Complex asteroseismology of the hybrid B-type pulsator $\gamma$ Pegasi: a test of stellar opacities - INSPIRE

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Complex asteroseismology of the hybrid B-type pulsator $\gamma$ Pegasi: a test of stellar opacities

Apr, 2010

5 pages

Published in:

Astron.Nachr. 331 (2010) 1057

e-Print:

1004.2366 [astro-ph.SR]

DOI:

10.1002/asna.201011456

View in:

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Abstract: (arXiv)

Using the updated oscillation spectrum of

\gamma

Pegasi, we construct a set of seismic models which reproduce two pulsational frequencies corresponding to the

\ell=0

, p

_1

and

\ell=1

, g

_1

modes. Then, we single out models which reproduce other well identified modes. Finally, we extend our seismic modelling by a requirement of fitting also values of the complex, nonadiabatic parameter

f

associated to each mode frequency. Such complex asteroseismology of the B-type pulsators provides a unique test of stellar metallicity and opacities. In contrast to our previous studies, results for

\gamma

Peg indicate that both opacity tables, OPAL and OP, are equally preferred.

References(22)

Figures(4)

- Mon.Not.Roy.Astron.Soc. 347 463

The chemical composition of the Sun

Martin Asplund
(
- Garching, Max Planck Inst.
)
,
Nicolas Grevesse
(
- Liege U.
)
,
A.Jacques Sauval
(
- Royal Observ. of Belgium
)
,
Pat Scott
(
- Stockholm U. and
- Stockholm U., OKC
)

- Ann.Rev.Astron.Astrophys. 47 (2009) 481-522
•
e-Print:
- 0909.0948
•
DOI:
- 10.1146/annurev.astro.46.060407.145222

- Astron.Astrophys. 448 697

Constraints on stellar convection from multi-color photometry of delta Scuti stars

- Astron.Astrophys. 407 (2003) 999-1006
•
e-Print:
- astro-ph/0305539
•
DOI:
- 10.1051/0004-6361:20030947

Constraints on parameters of B-type pulsators from combined multicolour photometry and radial velocity data. 1. Beta Cephei stars

- Astron.Astrophys. 441 (2005) 641
•
e-Print:
- astro-ph/0507253
•
DOI:
- 10.1051/0004-6361:20052690

The RASS-SDSS Galaxy Cluster Survey. 3. Scaling relations of galaxy clusters

- Astron.Astrophys. 433 (2005) 431-445
•
e-Print:
- astro-ph/0411536
•
DOI:
- 10.1051/0004-6361:20041915

Constraints on opacities from complex asteroseismology of B-type pulsators: the $\beta$ Cephei star $\theta$ Ophiuchi

- Mon.Not.Roy.Astron.Soc. 398 (2009) 1961
•
e-Print:
- 0906.3121
•
DOI:
- 10.1111/j.1365-2966.2009.15229.x

Complex asteroseismology of the $\beta$ Cep/SPB pulsator $\nu$ Eridani: constraints on opacities

- Mon.Not.Roy.Astron.Soc. 403 (2010) 496
•
e-Print:
- 0912.0622
•
DOI:
- 10.1111/j.1365-2966.2009.16141.x

An asteroseismic study of the beta Cephei star 12 Lacertae: multisite spectroscopic observations, mode identification and seismic modelling

et al.

- Mon.Not.Roy.Astron.Soc. 396 (2009) 1460
•
e-Print:
- 0903.5477
•
DOI:
- 10.1111/j.1365-2966.2009.14790.x

- Astron.Astrophys. 27 203

Confirmation of simultaneous p and g mode excitation in HD 8801 and Gamma Peg from time-resolved multicolour photometry of six candidate 'hybrid' pulsators

G. Handler

- Mon.Not.Roy.Astron.Soc. 398 (2009) 1339
•
e-Print:
- 0904.4859
•
DOI:
- 10.1111/j.1365-2966.2009.15005.x

Asteroseismology of the Beta Cephei star Nu Eridani: Photometric observations and pulsational frequency analysis

et al.

- Mon.Not.Roy.Astron.Soc. 347 (2004) 454
•
e-Print:
- astro-ph/0501263
•
DOI:
- 10.1111/j.1365-2966.2004.07214.x

Asteroseismology of the beta cephei star 12 (dd) lacertae: photometric observations, pulsational frequency analysis and mode identification

et al.

- Mon.Not.Roy.Astron.Soc. 365 (2006) 327-338
•
e-Print:
- astro-ph/0510326
•
DOI:
- 10.1111/j.1365-2966.2005.09728.x

- Astrophys.J. 698 56

Stellar Rotation in Field and Cluster B-Stars

- Astrophys.J. 683 (2008) 1045
•
e-Print:
- 0805.2133
•
DOI:
- 10.1086/590106

Updated Opal Opacities

- Astrophys.J. 464 (1996) 943
•
DOI:
- 10.1086/177381

- Acta Astron. 20 93

Asteroseismology of the Beta Cephei star Nu Eridani. 4. The 2003-4 multisite photometric campaign and the combined 2002-4 data

et al.

- Mon.Not.Roy.Astron.Soc. 360 (2005) 619-630
•
e-Print:
- astro-ph/0504238
•
DOI:
- 10.1111/j.1365-2966.2005.09088.x

- Publ.Astron.Soc.Pac. 65 144

Abundance analysis of prime B-type targets for asteroseismology. 1. Nitrogen excess in slowly-rotating Beta Cephei stars

Thierry Morel
(
- Leuven U.
)
,
K. Butler
(
- Munich U. Observ.
)
,
C. Aerts
(
- Leuven U. and
- Nijmegen U.
)
,
C. Neiner
(
- Leuven U. and
- Meudon Observ.
)
,
M. Briquet
(
- Leuven U.
)

- Astron.Astrophys. 457 (2006) 651
•
e-Print:
- astro-ph/0607264
•
DOI:
- 10.1051/0004-6361:20065171

OP data on CD for mean opacities and radiative accelerations

M.J. Seaton
(
- University Coll. London
)

- Mon.Not.Roy.Astron.Soc. 362 (2005) 1
•
e-Print:
- astro-ph/0411010
•
DOI:
- 10.1111/j.1365-2966.2005.00019.x

- Astron.Astrophys. 452 945