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Title: Observations of the pulsating white dwarf G 185-32
Authors: Castanheira, B. G.
Kepler, S. O.
Moskalik, P.
Moskalik, P.
Zola, S.
Pajdosz, G.
Krzensiński, J.
O'Donoghue, D.
Katz, M.
Buckley, D.
Vauclair, G.
Dolez, N.
Chevreton, M.
Barstow, M. A.
Kanaan, A.
Giovannini, O.
Provencal, J.
Kawaler, S. D.
Clemens, J. C.
Nather, R. E.
Winget, D. E.
Yanagida, K.
Dixson, J. S.
Watson, T. K.
Hansen, C. J.
Bradley, P. A.
Wood, M. A.
Sullivan, D. J.
Kleinman, S. J.
Meištas, E.
Solheim, J. -. E.
Bruvold, A.
Leibowitz, E.
Mazeh, T.
Koester, D.
Montgomery, M. H.
First Published: Jan-2004
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2004, 413 (2), pp. 623-634
Abstract: We observed the pulsating hydrogen atmosphere white dwarf G 185-32 with the Whole Earth Telescope in 1992. We report on a weighted Fourier transform of the data detecting 18 periodicities in its light curve. Using the Hubble Space Telescope Faint Object Spectrograph time resolved spectroscopy, and the wavelength dependence of the relative amplitudes, we identify the spherical harmonic degree ( $\ell$) for 14 pulsation signals. We also compare the determinations of effective temperature and surface gravity using the excited modes and atmospheric methods, obtaining $T_{{\rm eff}}=11\,960$ $\pm$ 80 K, $\log g=8.02$ $\pm$ 0.04 and M=0.617 $\pm$ $0.024~M_{\odot}$.
DOI Link: 10.1051/0004-6361:20031567
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2004 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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