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MODELING KEPLER OBSERVATIONS OF SOLAR-LIKE OSCILLATIONS IN THE RED GIANT STAR HD 186355

Identifieur interne : 006935 ( Main/Exploration ); précédent : 006934; suivant : 006936

MODELING KEPLER OBSERVATIONS OF SOLAR-LIKE OSCILLATIONS IN THE RED GIANT STAR HD 186355

Auteurs : C. Jiang [République populaire de Chine] ; B. W. Jiang [République populaire de Chine] ; J. Christensen-Dalsgaard [Danemark] ; T. R. Bedding [Australie] ; D. Stello [Australie] ; D. Huber [Australie] ; S. Frandsen [Danemark] ; H. Kjeldsen [Danemark] ; C. Karoff [Danemark] ; B. Mosser [France] ; P. Demarque [États-Unis] ; M. N. Fanelli [États-Unis] ; K. Kinemuchi [États-Unis] ; F. Mullally [États-Unis]

Source :

RBID : Pascal:12-0025843

Descripteurs français

English descriptors

Abstract

We have analyzed oscillations of the red giant star HD 186355 observed by the NASA Kepler satellite. The data consist of the first five quarters of science operations of Kepler, which cover about 13 months. The high-precision time-series data allow us to accurately extract the oscillation frequencies from the power spectrum. We find that the frequency of the maximum oscillation power, νmax, and the mean large frequency separation, Δν, are around 106 and 9.4 μHz, respectively. A regular pattern of radial and non-radial oscillation modes is identified by stacking the power spectra in an echelle diagram. We use the scaling relations of Δν and νmax to estimate the preliminary asteroseismic mass, which is confirmed with the modeling result (M = 1.45 ± 0.05 M◦.) using the Yale Rotating stellar Evolution Code (YREC7). In addition, we constrain the effective temperature, luminosity, and radius from comparisons between observational constraints and models. A number of mixed l = 1 modes are also detected and taken into account in our model comparisons. We find a mean observational period spacing for these mixed modes of about 58 s, suggesting that this red giant branch star is in the shell hydrogen-burning phase.


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Le document en format XML

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<term>Géante rouge</term>
<term>Etoile géante</term>
<term>Satellite Kepler</term>
<term>Série temporelle</term>
<term>Fréquence oscillation</term>
<term>Spectre puissance</term>
<term>Mode oscillation</term>
<term>Evolution stellaire</term>
<term>Température effective</term>
<term>Luminosité</term>
<term>Modèle</term>
<term>Combustion hydrogène</term>
<term>Analyse donnée</term>
<term>Etoile type solaire</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">We have analyzed oscillations of the red giant star HD 186355 observed by the NASA Kepler satellite. The data consist of the first five quarters of science operations of Kepler, which cover about 13 months. The high-precision time-series data allow us to accurately extract the oscillation frequencies from the power spectrum. We find that the frequency of the maximum oscillation power, ν
<sub>max</sub>
, and the mean large frequency separation, Δν, are around 106 and 9.4 μHz, respectively. A regular pattern of radial and non-radial oscillation modes is identified by stacking the power spectra in an echelle diagram. We use the scaling relations of Δν and ν
<sub>max</sub>
to estimate the preliminary asteroseismic mass, which is confirmed with the modeling result (M = 1.45 ± 0.05 M
<sub>◦.</sub>
) using the Yale Rotating stellar Evolution Code (YREC7). In addition, we constrain the effective temperature, luminosity, and radius from comparisons between observational constraints and models. A number of mixed l = 1 modes are also detected and taken into account in our model comparisons. We find a mean observational period spacing for these mixed modes of about 58 s, suggesting that this red giant branch star is in the shell hydrogen-burning phase.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>Danemark</li>
<li>France</li>
<li>République populaire de Chine</li>
<li>États-Unis</li>
</country>
<region>
<li>Nouvelle-Galles du Sud</li>
<li>Île-de-France</li>
</region>
<settlement>
<li>Paris</li>
<li>Pékin</li>
<li>Sydney</li>
</settlement>
<orgName>
<li>Université Pierre-et-Marie-Curie</li>
<li>Université de Sydney</li>
</orgName>
</list>
<tree>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Jiang, C" sort="Jiang, C" uniqKey="Jiang C" first="C." last="Jiang">C. Jiang</name>
</noRegion>
<name sortKey="Jiang, B W" sort="Jiang, B W" uniqKey="Jiang B" first="B. W." last="Jiang">B. W. Jiang</name>
</country>
<country name="Danemark">
<noRegion>
<name sortKey="Christensen Dalsgaard, J" sort="Christensen Dalsgaard, J" uniqKey="Christensen Dalsgaard J" first="J." last="Christensen-Dalsgaard">J. Christensen-Dalsgaard</name>
</noRegion>
<name sortKey="Frandsen, S" sort="Frandsen, S" uniqKey="Frandsen S" first="S." last="Frandsen">S. Frandsen</name>
<name sortKey="Karoff, C" sort="Karoff, C" uniqKey="Karoff C" first="C." last="Karoff">C. Karoff</name>
<name sortKey="Kjeldsen, H" sort="Kjeldsen, H" uniqKey="Kjeldsen H" first="H." last="Kjeldsen">H. Kjeldsen</name>
</country>
<country name="Australie">
<region name="Nouvelle-Galles du Sud">
<name sortKey="Bedding, T R" sort="Bedding, T R" uniqKey="Bedding T" first="T. R." last="Bedding">T. R. Bedding</name>
</region>
<name sortKey="Huber, D" sort="Huber, D" uniqKey="Huber D" first="D." last="Huber">D. Huber</name>
<name sortKey="Stello, D" sort="Stello, D" uniqKey="Stello D" first="D." last="Stello">D. Stello</name>
</country>
<country name="France">
<region name="Île-de-France">
<name sortKey="Mosser, B" sort="Mosser, B" uniqKey="Mosser B" first="B." last="Mosser">B. Mosser</name>
</region>
</country>
<country name="États-Unis">
<noRegion>
<name sortKey="Demarque, P" sort="Demarque, P" uniqKey="Demarque P" first="P." last="Demarque">P. Demarque</name>
</noRegion>
<name sortKey="Fanelli, M N" sort="Fanelli, M N" uniqKey="Fanelli M" first="M. N." last="Fanelli">M. N. Fanelli</name>
<name sortKey="Kinemuchi, K" sort="Kinemuchi, K" uniqKey="Kinemuchi K" first="K." last="Kinemuchi">K. Kinemuchi</name>
<name sortKey="Mullally, F" sort="Mullally, F" uniqKey="Mullally F" first="F." last="Mullally">F. Mullally</name>
</country>
</tree>
</affiliations>
</record>

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