PittsburghV1, France, Analysis, bibRecord, 000149

Radial dependence of line profile variability in seven 09-B0.5 stars

Identifieur interne : 000149 ( France/Analysis ); précédent : 000148; suivant : 000150

Radial dependence of line profile variability in seven 09-B0.5 stars

Auteurs : F. Martins [Belgique] ; W. Marcolino [France] ; D. J. Hillier [États-Unis] ; J. F. Donati [France] ; J. C. Bouret [France]

Source :

Astronomy and Astrophysics - A&A [ 0004-6361 ] ; 2015-02.

RBID : Hal:hal-01439992

Abstract

Context. Massive stars show a variety of spectral variabilities: discrete absorption components in UV P-Cygni profiles. optical line profile variability, X-ray variability, and radial velocity modulations. Aims. Our goal is to study the spectral variability of single OB stars to better understand the relation between photospheric and wind variability. For that, we rely on high spectral resolution and on high signal-to-noise ratio optical spectra collected with the spectrograph NARVAL on the Telescope Bernard Lyot at Pic du Midi. Methods. We investigated the variability of twelve spectral lines by means of the temporal variance spectrum. The selected lines probe the radial structure of the atmosphere from the photosphere to the outer wind. We also performed a spectroscopic analysis with atmosphere models to derive the stellar and wind properties and to constrain the formation region of the selected lines. Results. We show that variability is observed in the wind lines of all bright giants and superelants on a daily tiniescale. Lines formed in the photosphere are sometimes variable, sometimes not The dwarf stars do not show any sign of variability, If variability is observed on a daily timescale, it can also (but not always) be observed on hourly timescales, albeit with lower amplitude. There is a very clear correlation between amplitude of the variability and fraction of the fine formed in the wind. Strong anti-correlations between the different parts of the temporal variance spectrum are observed. Conclusions. Our results indicate that variability is stronger in lines formed in the wind. A link between photospheric and wind variability is not obvious from our study, since wind variability is observed regardless of the level of photospheric variability. Different photospheric lines also show different degrees of variability.

Url:

https://hal.archives-ouvertes.fr/hal-01439992

DOI: 10.1051/0004-6361/201423882

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Hal, to step Corpus: 000493
to stream Hal, to step Curation: 000493
to stream Hal, to step Checkpoint: 000170
to stream Main, to step Merge: 000209
to stream Main, to step Curation: 000209
to stream Main, to step Exploration: 000209
to stream France, to step Extraction: 000149

Links to Exploration step

Hal:hal-01439992

Le document en format XML

<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Radial dependence of line profile variability in seven 09-B0.5 stars</title>
<author><name sortKey="Martins, F" sort="Martins, F" uniqKey="Martins F" first="F." last="Martins">F. Martins</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-146171" status="VALID">          <orgName>Institut de la matière condensée et des nanosciences / Institute of Condensed Matter and Nanosciences</orgName>
          <orgName type="acronym">IMCN</orgName>
          <desc>            <address>              <addrLine>1/6, Place L. Pasteur -1348 Louvain-la-Neuve</addrLine>
              <country key="BE"></country>
            </address>
            <ref type="url">http://www.uclouvain.be/imcn.html</ref>
          </desc>
          <listRelation>            <relation active="#struct-92863" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle active="#struct-92863" type="direct"><org type="institution" xml:id="struct-92863" status="VALID">          <orgName>Université Catholique de Louvain</orgName>
          <orgName type="acronym">UCL</orgName>
          <desc>            <address>              <addrLine>Place de l'Université 1 - 1348 Louvain-La-Neuve</addrLine>
              <country key="BE"></country>
            </address>
            <ref type="url">http://www.uclouvain.be/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>Belgique</country>
<placeName><settlement type="city">Louvain-la-Neuve</settlement>
<region type="region" nuts="1">Région wallonne</region>
<region type="province" nuts="1">Province du Brabant wallon</region>
</placeName>
<orgName type="university">Université catholique de Louvain</orgName>
</affiliation>
</author>
<author><name sortKey="Marcolino, W" sort="Marcolino, W" uniqKey="Marcolino W" first="W." last="Marcolino">W. Marcolino</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-179944" status="VALID">          <idno type="IdRef">157042596</idno>
          <idno type="RNSR">201220274P</idno>
          <orgName>Laboratoire d'Astrophysique de Marseille</orgName>
          <orgName type="acronym">LAM</orgName>
          <date type="start">2012</date>
          <desc>            <address>              <addrLine>Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.lam.fr/</ref>
          </desc>
          <listRelation>            <relation name="UMR7326" active="#struct-198056" type="direct"></relation>
            <relation active="#struct-300045" type="direct"></relation>
            <relation name="UMR7326" active="#struct-441569" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle name="UMR7326" active="#struct-198056" type="direct"><org type="institution" xml:id="struct-198056" status="VALID">          <idno type="IdRef">15863621X</idno>
          <idno type="ISNI">0000 0001 2176 4817</idno>
          <orgName>Aix Marseille Université</orgName>
          <orgName type="acronym">AMU</orgName>
          <date type="start">2012-01-01</date>
          <desc>            <address>              <addrLine>Aix-Marseille UniversitéJardins du Pharo58 Boulevard Charles Livon13284 Marseille cedex 7</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.univ-amu.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID">          <orgName>Institut national des sciences de l'Univers </orgName>
          <orgName type="acronym">INSU - CNRS</orgName>
          <date type="start">2007-04-19</date>
          <desc>            <address>              <addrLine>INSU-CNRS3 rue Michel-Ange, 75794 Paris Cedex 16</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.insu.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle name="UMR7326" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID">          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>            <address>              <country key="FR"></country>
            </address>
            <ref type="url">http://www.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
<placeName><settlement type="city">Marseille</settlement>
<region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region>
</placeName>
<orgName type="university">Université d'Aix-Marseille</orgName>
</affiliation>
</author>
<author><name sortKey="Hillier, D J" sort="Hillier, D J" uniqKey="Hillier D" first="D. J." last="Hillier">D. J. Hillier</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-5648" status="INCOMING">          <orgName>Department of Physics and Astronomy</orgName>
          <desc>            <address>              <addrLine>3941 O'Hara Street, Pittsburgh, PA 15260</addrLine>
              <country key="US"></country>
            </address>
          </desc>
          <listRelation>            <relation active="#struct-378064" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle active="#struct-378064" type="direct"><org type="institution" xml:id="struct-378064" status="INCOMING">          <orgName>University of Pittsburgh</orgName>
          <desc>            <address>              <country key="FR"></country>
            </address>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>États-Unis</country>
<placeName><settlement type="city">Pittsburgh</settlement>
<region type="state">Pennsylvanie</region>
</placeName>
<orgName type="university">Université de Pittsburgh</orgName>
</affiliation>
</author>
<author><name sortKey="Donati, J F" sort="Donati, J F" uniqKey="Donati J" first="J. F." last="Donati">J. F. Donati</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-135748" status="VALID">          <orgName>Institut de recherche en astrophysique et planétologie</orgName>
          <orgName type="acronym">IRAP</orgName>
          <desc>            <address>              <country key="FR"></country>
            </address>
          </desc>
          <listRelation>            <relation active="#struct-217752" type="direct"></relation>
            <relation active="#struct-302940" type="direct"></relation>
            <relation name="UMR5277" active="#struct-441569" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle active="#struct-217752" type="direct"><org type="institution" xml:id="struct-217752" status="VALID">          <orgName>Université Paul Sabatier - Toulouse 3</orgName>
          <orgName type="acronym">UPS</orgName>
          <desc>            <address>              <addrLine>118 route de Narbonne - 31062 Toulouse</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.univ-tlse3.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle active="#struct-302940" type="direct"><org type="institution" xml:id="struct-302940" status="VALID">          <orgName>Observatoire Midi-Pyrénées</orgName>
          <orgName type="acronym">OMP</orgName>
          <desc>            <address>              <addrLine>14 avenue Edouard Belin, 31400 TOULOUSE</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.obs-mip.fr</ref>
          </desc>
        </org>
</tutelle>
<tutelle name="UMR5277" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID">          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>            <address>              <country key="FR"></country>
            </address>
            <ref type="url">http://www.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
</affiliation>
</author>
<author><name sortKey="Bouret, J C" sort="Bouret, J C" uniqKey="Bouret J" first="J. C." last="Bouret">J. C. Bouret</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-179944" status="VALID">          <idno type="IdRef">157042596</idno>
          <idno type="RNSR">201220274P</idno>
          <orgName>Laboratoire d'Astrophysique de Marseille</orgName>
          <orgName type="acronym">LAM</orgName>
          <date type="start">2012</date>
          <desc>            <address>              <addrLine>Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.lam.fr/</ref>
          </desc>
          <listRelation>            <relation name="UMR7326" active="#struct-198056" type="direct"></relation>
            <relation active="#struct-300045" type="direct"></relation>
            <relation name="UMR7326" active="#struct-441569" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle name="UMR7326" active="#struct-198056" type="direct"><org type="institution" xml:id="struct-198056" status="VALID">          <idno type="IdRef">15863621X</idno>
          <idno type="ISNI">0000 0001 2176 4817</idno>
          <orgName>Aix Marseille Université</orgName>
          <orgName type="acronym">AMU</orgName>
          <date type="start">2012-01-01</date>
          <desc>            <address>              <addrLine>Aix-Marseille UniversitéJardins du Pharo58 Boulevard Charles Livon13284 Marseille cedex 7</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.univ-amu.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID">          <orgName>Institut national des sciences de l'Univers </orgName>
          <orgName type="acronym">INSU - CNRS</orgName>
          <date type="start">2007-04-19</date>
          <desc>            <address>              <addrLine>INSU-CNRS3 rue Michel-Ange, 75794 Paris Cedex 16</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.insu.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle name="UMR7326" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID">          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>            <address>              <country key="FR"></country>
            </address>
            <ref type="url">http://www.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
<placeName><settlement type="city">Marseille</settlement>
<region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region>
</placeName>
<orgName type="university">Université d'Aix-Marseille</orgName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">HAL</idno>
<idno type="RBID">Hal:hal-01439992</idno>
<idno type="halId">hal-01439992</idno>
<idno type="halUri">https://hal.archives-ouvertes.fr/hal-01439992</idno>
<idno type="url">https://hal.archives-ouvertes.fr/hal-01439992</idno>
<idno type="doi">10.1051/0004-6361/201423882</idno>
<date when="2015-02">2015-02</date>
<idno type="wicri:Area/Hal/Corpus">000493</idno>
<idno type="wicri:Area/Hal/Curation">000493</idno>
<idno type="wicri:Area/Hal/Checkpoint">000170</idno>
<idno type="wicri:explorRef" wicri:stream="Hal" wicri:step="Checkpoint">000170</idno>
<idno type="wicri:doubleKey">0004-6361:2015:Martins F:radial:dependence:of</idno>
<idno type="wicri:Area/Main/Merge">000209</idno>
<idno type="wicri:Area/Main/Curation">000209</idno>
<idno type="wicri:Area/Main/Exploration">000209</idno>
<idno type="wicri:Area/France/Extraction">000149</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en">Radial dependence of line profile variability in seven 09-B0.5 stars</title>
<author><name sortKey="Martins, F" sort="Martins, F" uniqKey="Martins F" first="F." last="Martins">F. Martins</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-146171" status="VALID">          <orgName>Institut de la matière condensée et des nanosciences / Institute of Condensed Matter and Nanosciences</orgName>
          <orgName type="acronym">IMCN</orgName>
          <desc>            <address>              <addrLine>1/6, Place L. Pasteur -1348 Louvain-la-Neuve</addrLine>
              <country key="BE"></country>
            </address>
            <ref type="url">http://www.uclouvain.be/imcn.html</ref>
          </desc>
          <listRelation>            <relation active="#struct-92863" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle active="#struct-92863" type="direct"><org type="institution" xml:id="struct-92863" status="VALID">          <orgName>Université Catholique de Louvain</orgName>
          <orgName type="acronym">UCL</orgName>
          <desc>            <address>              <addrLine>Place de l'Université 1 - 1348 Louvain-La-Neuve</addrLine>
              <country key="BE"></country>
            </address>
            <ref type="url">http://www.uclouvain.be/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>Belgique</country>
<placeName><settlement type="city">Louvain-la-Neuve</settlement>
<region type="region" nuts="1">Région wallonne</region>
<region type="province" nuts="1">Province du Brabant wallon</region>
</placeName>
<orgName type="university">Université catholique de Louvain</orgName>
</affiliation>
</author>
<author><name sortKey="Marcolino, W" sort="Marcolino, W" uniqKey="Marcolino W" first="W." last="Marcolino">W. Marcolino</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-179944" status="VALID">          <idno type="IdRef">157042596</idno>
          <idno type="RNSR">201220274P</idno>
          <orgName>Laboratoire d'Astrophysique de Marseille</orgName>
          <orgName type="acronym">LAM</orgName>
          <date type="start">2012</date>
          <desc>            <address>              <addrLine>Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.lam.fr/</ref>
          </desc>
          <listRelation>            <relation name="UMR7326" active="#struct-198056" type="direct"></relation>
            <relation active="#struct-300045" type="direct"></relation>
            <relation name="UMR7326" active="#struct-441569" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle name="UMR7326" active="#struct-198056" type="direct"><org type="institution" xml:id="struct-198056" status="VALID">          <idno type="IdRef">15863621X</idno>
          <idno type="ISNI">0000 0001 2176 4817</idno>
          <orgName>Aix Marseille Université</orgName>
          <orgName type="acronym">AMU</orgName>
          <date type="start">2012-01-01</date>
          <desc>            <address>              <addrLine>Aix-Marseille UniversitéJardins du Pharo58 Boulevard Charles Livon13284 Marseille cedex 7</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.univ-amu.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID">          <orgName>Institut national des sciences de l'Univers </orgName>
          <orgName type="acronym">INSU - CNRS</orgName>
          <date type="start">2007-04-19</date>
          <desc>            <address>              <addrLine>INSU-CNRS3 rue Michel-Ange, 75794 Paris Cedex 16</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.insu.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle name="UMR7326" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID">          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>            <address>              <country key="FR"></country>
            </address>
            <ref type="url">http://www.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
<placeName><settlement type="city">Marseille</settlement>
<region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region>
</placeName>
<orgName type="university">Université d'Aix-Marseille</orgName>
</affiliation>
</author>
<author><name sortKey="Hillier, D J" sort="Hillier, D J" uniqKey="Hillier D" first="D. J." last="Hillier">D. J. Hillier</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-5648" status="INCOMING">          <orgName>Department of Physics and Astronomy</orgName>
          <desc>            <address>              <addrLine>3941 O'Hara Street, Pittsburgh, PA 15260</addrLine>
              <country key="US"></country>
            </address>
          </desc>
          <listRelation>            <relation active="#struct-378064" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle active="#struct-378064" type="direct"><org type="institution" xml:id="struct-378064" status="INCOMING">          <orgName>University of Pittsburgh</orgName>
          <desc>            <address>              <country key="FR"></country>
            </address>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>États-Unis</country>
<placeName><settlement type="city">Pittsburgh</settlement>
<region type="state">Pennsylvanie</region>
</placeName>
<orgName type="university">Université de Pittsburgh</orgName>
</affiliation>
</author>
<author><name sortKey="Donati, J F" sort="Donati, J F" uniqKey="Donati J" first="J. F." last="Donati">J. F. Donati</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-135748" status="VALID">          <orgName>Institut de recherche en astrophysique et planétologie</orgName>
          <orgName type="acronym">IRAP</orgName>
          <desc>            <address>              <country key="FR"></country>
            </address>
          </desc>
          <listRelation>            <relation active="#struct-217752" type="direct"></relation>
            <relation active="#struct-302940" type="direct"></relation>
            <relation name="UMR5277" active="#struct-441569" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle active="#struct-217752" type="direct"><org type="institution" xml:id="struct-217752" status="VALID">          <orgName>Université Paul Sabatier - Toulouse 3</orgName>
          <orgName type="acronym">UPS</orgName>
          <desc>            <address>              <addrLine>118 route de Narbonne - 31062 Toulouse</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.univ-tlse3.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle active="#struct-302940" type="direct"><org type="institution" xml:id="struct-302940" status="VALID">          <orgName>Observatoire Midi-Pyrénées</orgName>
          <orgName type="acronym">OMP</orgName>
          <desc>            <address>              <addrLine>14 avenue Edouard Belin, 31400 TOULOUSE</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.obs-mip.fr</ref>
          </desc>
        </org>
</tutelle>
<tutelle name="UMR5277" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID">          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>            <address>              <country key="FR"></country>
            </address>
            <ref type="url">http://www.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
</affiliation>
</author>
<author><name sortKey="Bouret, J C" sort="Bouret, J C" uniqKey="Bouret J" first="J. C." last="Bouret">J. C. Bouret</name>
<affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-179944" status="VALID">          <idno type="IdRef">157042596</idno>
          <idno type="RNSR">201220274P</idno>
          <orgName>Laboratoire d'Astrophysique de Marseille</orgName>
          <orgName type="acronym">LAM</orgName>
          <date type="start">2012</date>
          <desc>            <address>              <addrLine>Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.lam.fr/</ref>
          </desc>
          <listRelation>            <relation name="UMR7326" active="#struct-198056" type="direct"></relation>
            <relation active="#struct-300045" type="direct"></relation>
            <relation name="UMR7326" active="#struct-441569" type="direct"></relation>
          </listRelation>
        <tutelles><tutelle name="UMR7326" active="#struct-198056" type="direct"><org type="institution" xml:id="struct-198056" status="VALID">          <idno type="IdRef">15863621X</idno>
          <idno type="ISNI">0000 0001 2176 4817</idno>
          <orgName>Aix Marseille Université</orgName>
          <orgName type="acronym">AMU</orgName>
          <date type="start">2012-01-01</date>
          <desc>            <address>              <addrLine>Aix-Marseille UniversitéJardins du Pharo58 Boulevard Charles Livon13284 Marseille cedex 7</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.univ-amu.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID">          <orgName>Institut national des sciences de l'Univers </orgName>
          <orgName type="acronym">INSU - CNRS</orgName>
          <date type="start">2007-04-19</date>
          <desc>            <address>              <addrLine>INSU-CNRS3 rue Michel-Ange, 75794 Paris Cedex 16</addrLine>
              <country key="FR"></country>
            </address>
            <ref type="url">http://www.insu.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
<tutelle name="UMR7326" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID">          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>            <address>              <country key="FR"></country>
            </address>
            <ref type="url">http://www.cnrs.fr/</ref>
          </desc>
        </org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
<placeName><settlement type="city">Marseille</settlement>
<region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region>
</placeName>
<orgName type="university">Université d'Aix-Marseille</orgName>
</affiliation>
</author>
</analytic>
<idno type="DOI">10.1051/0004-6361/201423882</idno>
<series><title level="j">Astronomy and Astrophysics - A&A</title>
<idno type="ISSN">0004-6361</idno>
<imprint><date type="datePub">2015-02</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Context. Massive stars show a variety of spectral variabilities: discrete absorption components in UV P-Cygni profiles. optical line profile variability, X-ray variability, and radial velocity modulations. Aims. Our goal is to study the spectral variability of single OB stars to better understand the relation between photospheric and wind variability. For that, we rely on high spectral resolution and on high signal-to-noise ratio optical spectra collected with the spectrograph NARVAL on the Telescope Bernard Lyot at Pic du Midi. Methods. We investigated the variability of twelve spectral lines by means of the temporal variance spectrum. The selected lines probe the radial structure of the atmosphere from the photosphere to the outer wind. We also performed a spectroscopic analysis with atmosphere models to derive the stellar and wind properties and to constrain the formation region of the selected lines. Results. We show that variability is observed in the wind lines of all bright giants and superelants on a daily tiniescale. Lines formed in the photosphere are sometimes variable, sometimes not The dwarf stars do not show any sign of variability, If variability is observed on a daily timescale, it can also (but not always) be observed on hourly timescales, albeit with lower amplitude. There is a very clear correlation between amplitude of the variability and fraction of the fine formed in the wind. Strong anti-correlations between the different parts of the temporal variance spectrum are observed. Conclusions. Our results indicate that variability is stronger in lines formed in the wind. A link between photospheric and wind variability is not obvious from our study, since wind variability is observed regardless of the level of photospheric variability. Different photospheric lines also show different degrees of variability.</div>
</front>
</TEI>
<affiliations><list><country><li>Belgique</li>
<li>France</li>
<li>États-Unis</li>
</country>
<region><li>Pennsylvanie</li>
<li>Provence-Alpes-Côte d'Azur</li>
<li>Province du Brabant wallon</li>
<li>Région wallonne</li>
</region>
<settlement><li>Louvain-la-Neuve</li>
<li>Marseille</li>
<li>Pittsburgh</li>
</settlement>
<orgName><li>Université catholique de Louvain</li>
<li>Université d'Aix-Marseille</li>
<li>Université de Pittsburgh</li>
</orgName>
</list>
<tree><country name="Belgique"><region name="Région wallonne"><name sortKey="Martins, F" sort="Martins, F" uniqKey="Martins F" first="F." last="Martins">F. Martins</name>
</region>
</country>
<country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Marcolino, W" sort="Marcolino, W" uniqKey="Marcolino W" first="W." last="Marcolino">W. Marcolino</name>
</region>
<name sortKey="Bouret, J C" sort="Bouret, J C" uniqKey="Bouret J" first="J. C." last="Bouret">J. C. Bouret</name>
<name sortKey="Donati, J F" sort="Donati, J F" uniqKey="Donati J" first="J. F." last="Donati">J. F. Donati</name>
</country>
<country name="États-Unis"><region name="Pennsylvanie"><name sortKey="Hillier, D J" sort="Hillier, D J" uniqKey="Hillier D" first="D. J." last="Hillier">D. J. Hillier</name>
</region>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Amérique/explor/PittsburghV1/Data/France/Analysis

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000149 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/France/Analysis/biblio.hfd -nk 000149 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Amérique
   |area=    PittsburghV1
   |flux=    France
   |étape=   Analysis
   |type=    RBID
   |clé=     Hal:hal-01439992
   |texte=   Radial dependence of line profile variability in seven 09-B0.5 stars
}}

This area was generated with Dilib version V0.6.38.
Data generation: Fri Jun 18 17:37:45 2021. Site generation: Fri Jun 18 18:15:47 2021

	Serveur d'exploration sur Pittsburgh
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.

Serveur d'exploration sur Pittsburgh

Radial dependence of line profile variability in seven 09-B0.5 stars

Radial dependence of line profile variability in seven 09-B0.5 stars

Source :

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri