EDP Sciences
Free access
Issue
A&A
Volume 438, Number 2, August I 2005
Page(s) 633 - 641
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20042410


A&A 438, 633-641 (2005)
DOI: 10.1051/0004-6361:20042410

Modelling of the fast rotating $\delta$ Scuti star Altair

J. C. Suárez1, H. Bruntt2, 3 and D. Buzasi2

1  Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain
    e-mail: jcsuarez@iaa.es
2  Department of Physics, US Air Force Academy, 2354 Fairchild Dr., Ste. 2A31, USAF Academy, CO, USA
    e-mail: derek.buzasi@usafa.af.mil
3  Copenhagen University, Astronomical Observatory, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
    e-mail: bruntt@phys.au.dk

(Received 22 November 2004 / Accepted 15 March 2005)

Abstract
We present an asteroseismic study of the fast rotating star HD 187642 ( Altair ), recently discovered to be a $\delta$ Scuti pulsator. We have computed models taking into account rotation for increasing rotational velocities. We investigate the relation between the fundamental radial mode and the first overtone in the framework of Petersen diagrams. The effects of rotation on such diagrams, which become important at rotational velocities above $150~\rm {km}\,\rm {s}^{-1}$, as well as the domain of validity of our seismic tools are discussed. We also investigate the radial and non-radial modes in order to constrain models fitting the five most dominant observed oscillation modes.


Key words: stars: variables: $\delta$ Sct -- stars: rotation -- stars: oscillations -- stars: fundamental parameters -- stars: interiors -- stars: individual: Altair

SIMBAD Objects



© ESO 2005

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.