Evidence for an accretion steam in the low-accretion-rate polar J2048
Identifieur interne : 000063 ( Main/Exploration ); précédent : 000062; suivant : 000064Evidence for an accretion steam in the low-accretion-rate polar J2048
Auteurs : S. Kafka [États-Unis] ; C. Tappert [Chili] ; R. K. Honeycutt [États-Unis]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2010-04-01.
Abstract
We present new red/near-infrared spectra of the low-accretion-rate polar J204827.9+005008.9. Compared to 2004 spectra in the literature, our 2008 data show more structured emission-line profiles. All emission lines in our spectra have two components at most orbital phases. The stronger component has a sinusoidal velocity variation (K∼ 120 km s−1) and is likely due to irradiation of the inner hemisphere of the secondary star by the white dwarf. Based on the appearance of the Hα Doppler tomogram, the weaker, larger amplitude, line component likely originates in a ballistic stream from the L1 point. J2048 is thought to be accreting via a wind from the secondary star, so the detection of velocity features consistent with the velocities of Roche lobe overflow is unexpected. It appears that J2048 was experiencing an interval of enhanced mass transfer during our observations. We briefly discuss scenarios that might lead to such a situation, such as changes in the chromospheric activity level on the secondary star.
Url:
DOI: 10.1111/j.1365-2966.2009.16063.x
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Evidence for an accretion steam in the low-accretion-rate polar J2048</title><author><name sortKey="Kafka, S" sort="Kafka, S" uniqKey="Kafka S" first="S." last="Kafka">S. Kafka</name></author><author><name sortKey="Tappert, C" sort="Tappert, C" uniqKey="Tappert C" first="C." last="Tappert">C. Tappert</name></author><author><name sortKey="Honeycutt, R K" sort="Honeycutt, R K" uniqKey="Honeycutt R" first="R. K." last="Honeycutt">R. K. Honeycutt</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:F5BBBF5FE583D4ED1D7DCDD9859970EB356FB493</idno><date when="2010" year="2010">2010</date><idno type="doi">10.1111/j.1365-2966.2009.16063.x</idno><idno type="url">https://api.istex.fr/document/F5BBBF5FE583D4ED1D7DCDD9859970EB356FB493/fulltext/pdf</idno><idno type="wicri:Area/Main/Corpus">000733</idno><idno type="wicri:Area/Main/Curation">000733</idno><idno type="wicri:Area/Main/Exploration">000063</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Exploration">000063</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Evidence for an accretion steam in the low-accretion-rate polar J2048</title><author><name sortKey="Kafka, S" sort="Kafka, S" uniqKey="Kafka S" first="S." last="Kafka">S. Kafka</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Spitzer Science Center/Caltech, MC 220-6, 1200 E.California Blvd, Pasadena, CA 91125</wicri:regionArea><wicri:noRegion>CA 91125</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">États-Unis</country></affiliation></author><author><name sortKey="Tappert, C" sort="Tappert, C" uniqKey="Tappert C" first="C." last="Tappert">C. Tappert</name><affiliation wicri:level="1"><country xml:lang="fr">Chili</country><wicri:regionArea>Departamento de Astronomia y Astrofisica, Pontificia Universidad Catolica, Vicuna Mackenna 4860, 782-0436 Macul</wicri:regionArea><wicri:noRegion>782-0436 Macul</wicri:noRegion></affiliation></author><author><name sortKey="Honeycutt, R K" sort="Honeycutt, R K" uniqKey="Honeycutt R" first="R. K." last="Honeycutt">R. K. Honeycutt</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Indiana University, Astronomy Department, Swain Hall West, Bloomington, IN 47405</wicri:regionArea><wicri:noRegion>IN 47405</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="abbrev">Monthly Notices of the Royal Astronomical Society</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2010-04-01">2010-04-01</date><biblScope unit="volume">403</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="755">755</biblScope><biblScope unit="page" to="759">759</biblScope></imprint><idno type="ISSN">0035-8711</idno></series><idno type="istex">F5BBBF5FE583D4ED1D7DCDD9859970EB356FB493</idno><idno type="DOI">10.1111/j.1365-2966.2009.16063.x</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">We present new red/near-infrared spectra of the low-accretion-rate polar J204827.9+005008.9. Compared to 2004 spectra in the literature, our 2008 data show more structured emission-line profiles. All emission lines in our spectra have two components at most orbital phases. The stronger component has a sinusoidal velocity variation (K∼ 120 km s−1) and is likely due to irradiation of the inner hemisphere of the secondary star by the white dwarf. Based on the appearance of the Hα Doppler tomogram, the weaker, larger amplitude, line component likely originates in a ballistic stream from the L1 point. J2048 is thought to be accreting via a wind from the secondary star, so the detection of velocity features consistent with the velocities of Roche lobe overflow is unexpected. It appears that J2048 was experiencing an interval of enhanced mass transfer during our observations. We briefly discuss scenarios that might lead to such a situation, such as changes in the chromospheric activity level on the secondary star.</div></front></TEI><affiliations><list><country><li>Chili</li><li>États-Unis</li></country></list><tree><country name="États-Unis"><noRegion><name sortKey="Kafka, S" sort="Kafka, S" uniqKey="Kafka S" first="S." last="Kafka">S. Kafka</name></noRegion><name sortKey="Honeycutt, R K" sort="Honeycutt, R K" uniqKey="Honeycutt R" first="R. K." last="Honeycutt">R. K. Honeycutt</name><name sortKey="Kafka, S" sort="Kafka, S" uniqKey="Kafka S" first="S." last="Kafka">S. Kafka</name></country><country name="Chili"><noRegion><name sortKey="Tappert, C" sort="Tappert, C" uniqKey="Tappert C" first="C." last="Tappert">C. Tappert</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Amerique/explor/CaltechV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000063 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000063 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Amerique
|area= CaltechV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:F5BBBF5FE583D4ED1D7DCDD9859970EB356FB493
|texte= Evidence for an accretion steam in the low-accretion-rate polar J2048
}}
| This area was generated with Dilib version V0.6.32. |  |