AustralieFrV1, Main, Exploration, bibRecord, 003132

Asteroseismology can reveal strong internal magnetic fields in red giant stars.

Identifieur interne : 003132 ( Main/Exploration ); précédent : 003131; suivant : 003133

Asteroseismology can reveal strong internal magnetic fields in red giant stars.

Auteurs : Jim Fuller [États-Unis] ; Matteo Cantiello [États-Unis] ; Dennis Stello [Danemark] ; Rafael A. Garcia [France] ; Lars Bildsten [États-Unis]

Source :

Science (New York, N.Y.) [ 1095-9203 ] ; 2015.

RBID : pubmed:26494754

Abstract

Internal stellar magnetic fields are inaccessible to direct observations, and little is known about their amplitude, geometry, and evolution. We demonstrate that strong magnetic fields in the cores of red giant stars can be identified with asteroseismology. The fields can manifest themselves via depressed dipole stellar oscillation modes, arising from a magnetic greenhouse effect that scatters and traps oscillation-mode energy within the core of the star. The Kepler satellite has observed a few dozen red giants with depressed dipole modes, which we interpret as stars with strongly magnetized cores. We find that field strengths larger than ~10(5) gauss may produce the observed depression, and in one case we infer a minimum core field strength of ≈10(7) gauss.

DOI: 10.1126/science.aac6933
PubMed: 26494754

Affiliations:

Le document en format XML

<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Asteroseismology can reveal strong internal magnetic fields in red giant stars.</title>
<author><name sortKey="Fuller, Jim" sort="Fuller, Jim" uniqKey="Fuller J" first="Jim" last="Fuller">Jim Fuller</name>
<affiliation wicri:level="2"><nlm:affiliation>TAPIR, Walter Burke Institute for Theoretical Physics, Mailcode 350-17 California Institute of Technology, Pasadena, CA 91125, USA. Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. jfuller@caltech.edu matteo@kitp.ucsb.edu.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>TAPIR, Walter Burke Institute for Theoretical Physics, Mailcode 350-17 California Institute of Technology, Pasadena, CA 91125, USA. Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Cantiello, Matteo" sort="Cantiello, Matteo" uniqKey="Cantiello M" first="Matteo" last="Cantiello">Matteo Cantiello</name>
<affiliation wicri:level="2"><nlm:affiliation>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. jfuller@caltech.edu matteo@kitp.ucsb.edu.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Stello, Dennis" sort="Stello, Dennis" uniqKey="Stello D" first="Dennis" last="Stello">Dennis Stello</name>
<affiliation wicri:level="4"><nlm:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.</nlm:affiliation>
<country xml:lang="fr">Danemark</country>
<wicri:regionArea>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C</wicri:regionArea>
<orgName type="university">Université de Sydney</orgName>
<placeName><settlement type="city">Sydney</settlement>
<region type="état">Nouvelle-Galles du Sud</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Garcia, Rafael A" sort="Garcia, Rafael A" uniqKey="Garcia R" first="Rafael A" last="Garcia">Rafael A. Garcia</name>
<affiliation wicri:level="1"><nlm:affiliation>Laboratoire Astrophysique Interactions Multi-échelles, Commissariat á l'Énergie Atomique/Direction des Sciences de la Matiére, CNRS, Université Paris Diderot, Institut de Recherches sur les lois Fondamentales de l'Univers/Service d'Astrophysique Centre de Saclay, 91191 Gif-sur-Yvette Cedex, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire Astrophysique Interactions Multi-échelles, Commissariat á l'Énergie Atomique/Direction des Sciences de la Matiére, CNRS, Université Paris Diderot, Institut de Recherches sur les lois Fondamentales de l'Univers/Service d'Astrophysique Centre de Saclay, 91191 Gif-sur-Yvette Cedex</wicri:regionArea>
<wicri:noRegion>91191 Gif-sur-Yvette Cedex</wicri:noRegion>
<wicri:noRegion>91191 Gif-sur-Yvette Cedex</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Bildsten, Lars" sort="Bildsten, Lars" uniqKey="Bildsten L" first="Lars" last="Bildsten">Lars Bildsten</name>
<affiliation wicri:level="2"><nlm:affiliation>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. Department of Physics, University of California, Santa Barbara, CA 93106, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. Department of Physics, University of California, Santa Barbara, CA 93106</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PubMed</idno>
<date when="2015">2015</date>
<idno type="RBID">pubmed:26494754</idno>
<idno type="pmid">26494754</idno>
<idno type="doi">10.1126/science.aac6933</idno>
<idno type="wicri:Area/PubMed/Corpus">002873</idno>
<idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">002873</idno>
<idno type="wicri:Area/PubMed/Curation">002804</idno>
<idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">002804</idno>
<idno type="wicri:Area/PubMed/Checkpoint">002804</idno>
<idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">002804</idno>
<idno type="wicri:Area/Ncbi/Merge">002C61</idno>
<idno type="wicri:Area/Ncbi/Curation">002C61</idno>
<idno type="wicri:Area/Ncbi/Checkpoint">002C61</idno>
<idno type="wicri:Area/Main/Merge">003133</idno>
<idno type="wicri:Area/Main/Curation">003132</idno>
<idno type="wicri:Area/Main/Exploration">003132</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en">Asteroseismology can reveal strong internal magnetic fields in red giant stars.</title>
<author><name sortKey="Fuller, Jim" sort="Fuller, Jim" uniqKey="Fuller J" first="Jim" last="Fuller">Jim Fuller</name>
<affiliation wicri:level="2"><nlm:affiliation>TAPIR, Walter Burke Institute for Theoretical Physics, Mailcode 350-17 California Institute of Technology, Pasadena, CA 91125, USA. Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. jfuller@caltech.edu matteo@kitp.ucsb.edu.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>TAPIR, Walter Burke Institute for Theoretical Physics, Mailcode 350-17 California Institute of Technology, Pasadena, CA 91125, USA. Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Cantiello, Matteo" sort="Cantiello, Matteo" uniqKey="Cantiello M" first="Matteo" last="Cantiello">Matteo Cantiello</name>
<affiliation wicri:level="2"><nlm:affiliation>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. jfuller@caltech.edu matteo@kitp.ucsb.edu.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Stello, Dennis" sort="Stello, Dennis" uniqKey="Stello D" first="Dennis" last="Stello">Dennis Stello</name>
<affiliation wicri:level="4"><nlm:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.</nlm:affiliation>
<country xml:lang="fr">Danemark</country>
<wicri:regionArea>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C</wicri:regionArea>
<orgName type="university">Université de Sydney</orgName>
<placeName><settlement type="city">Sydney</settlement>
<region type="état">Nouvelle-Galles du Sud</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Garcia, Rafael A" sort="Garcia, Rafael A" uniqKey="Garcia R" first="Rafael A" last="Garcia">Rafael A. Garcia</name>
<affiliation wicri:level="1"><nlm:affiliation>Laboratoire Astrophysique Interactions Multi-échelles, Commissariat á l'Énergie Atomique/Direction des Sciences de la Matiére, CNRS, Université Paris Diderot, Institut de Recherches sur les lois Fondamentales de l'Univers/Service d'Astrophysique Centre de Saclay, 91191 Gif-sur-Yvette Cedex, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire Astrophysique Interactions Multi-échelles, Commissariat á l'Énergie Atomique/Direction des Sciences de la Matiére, CNRS, Université Paris Diderot, Institut de Recherches sur les lois Fondamentales de l'Univers/Service d'Astrophysique Centre de Saclay, 91191 Gif-sur-Yvette Cedex</wicri:regionArea>
<wicri:noRegion>91191 Gif-sur-Yvette Cedex</wicri:noRegion>
<wicri:noRegion>91191 Gif-sur-Yvette Cedex</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Bildsten, Lars" sort="Bildsten, Lars" uniqKey="Bildsten L" first="Lars" last="Bildsten">Lars Bildsten</name>
<affiliation wicri:level="2"><nlm:affiliation>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. Department of Physics, University of California, Santa Barbara, CA 93106, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. Department of Physics, University of California, Santa Barbara, CA 93106</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
</analytic>
<series><title level="j">Science (New York, N.Y.)</title>
<idno type="eISSN">1095-9203</idno>
<imprint><date when="2015" type="published">2015</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Internal stellar magnetic fields are inaccessible to direct observations, and little is known about their amplitude, geometry, and evolution. We demonstrate that strong magnetic fields in the cores of red giant stars can be identified with asteroseismology. The fields can manifest themselves via depressed dipole stellar oscillation modes, arising from a magnetic greenhouse effect that scatters and traps oscillation-mode energy within the core of the star. The Kepler satellite has observed a few dozen red giants with depressed dipole modes, which we interpret as stars with strongly magnetized cores. We find that field strengths larger than ~10(5) gauss may produce the observed depression, and in one case we infer a minimum core field strength of ≈10(7) gauss.</div>
</front>
</TEI>
<affiliations><list><country><li>Danemark</li>
<li>France</li>
<li>États-Unis</li>
</country>
<region><li>Californie</li>
<li>Nouvelle-Galles du Sud</li>
</region>
<settlement><li>Sydney</li>
</settlement>
<orgName><li>Université de Sydney</li>
</orgName>
</list>
<tree><country name="États-Unis"><region name="Californie"><name sortKey="Fuller, Jim" sort="Fuller, Jim" uniqKey="Fuller J" first="Jim" last="Fuller">Jim Fuller</name>
</region>
<name sortKey="Bildsten, Lars" sort="Bildsten, Lars" uniqKey="Bildsten L" first="Lars" last="Bildsten">Lars Bildsten</name>
<name sortKey="Cantiello, Matteo" sort="Cantiello, Matteo" uniqKey="Cantiello M" first="Matteo" last="Cantiello">Matteo Cantiello</name>
</country>
<country name="Danemark"><region name="Nouvelle-Galles du Sud"><name sortKey="Stello, Dennis" sort="Stello, Dennis" uniqKey="Stello D" first="Dennis" last="Stello">Dennis Stello</name>
</region>
</country>
<country name="France"><noRegion><name sortKey="Garcia, Rafael A" sort="Garcia, Rafael A" uniqKey="Garcia R" first="Rafael A" last="Garcia">Rafael A. Garcia</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Main/Exploration

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 003132 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 003132 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Asie
   |area=    AustralieFrV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:26494754
   |texte=   Asteroseismology can reveal strong internal magnetic fields in red giant stars.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:26494754" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a AustralieFrV1

This area was generated with Dilib version V0.6.33.
Data generation: Tue Dec 5 10:43:12 2017. Site generation: Tue Mar 5 14:07:20 2024

Serveur d'exploration sur les relations entre la France et l'Australie

Asteroseismology can reveal strong internal magnetic fields in red giant stars.

Asteroseismology can reveal strong internal magnetic fields in red giant stars.

Source :

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration sur les relations entre la France et l'Australie
	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.