Issue |
A&A
Volume 413, Number 2, January II 2004
|
|
---|---|---|
Page(s) | 623 - 634 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20031567 | |
Published online | 18 December 2003 |
Observations of the Pulsating White Dwarf G 185–32
1
Instituto de Física, Universidade Federal do Rio Grande do Sul, 91501-900 Porto-Alegre, RS, Brazil
2
Copernicus Astronomical Center, Ul. Bartycka 18, 00-716 Warsaw, Poland
3
Mt. Suhora Observatory, Cracow Pedagogical University, Ul. Podchorazych 2, 30-084 Cracow, Poland
4
South African Astronomical Observatory, PO Box 9, Observatory 7935, SA
5
Université Paul Sabatier, Observatoire Midi-Pyrénées, CNRS/UMR5572, 14 av. E. Belin, 31400 Toulouse, France
6
Observatoire de Paris-Meudon, DAEC, 92195 Meudon, France
7
Department of Physics and Astronomy, Leicester University, University Road, Leicester, LE1 7RH, UK
8
Departamento de Física, Universidade Federal de Santa Catarina, CP 476, 88040-900, Florianópolis, Brazil
9
Departamento de Física e Química, Universidade de Caxias do Sul, Caxias do Sul, RS - CEP 95001-970, Brazil
10
Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
11
Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
12
Department of Physics, University of North Carolina, Chapel Hill, NC 27599-3255, USA
13
Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA
14
Southwestern University, Georgetown, USA
15
JILA, University of Colorado, Boulder, CO, USA
16
Los Alamos National Laboratory, X-2, MS T-085, Los Alamos, NM 87545, USA
17
Dept. of Physics and Space Sciences & The SARA Observatory, Florida Institute of Technology, Melbourne, FL 32901, USA
18
Victoria University of Wellington, PO Box 600, Wellington, New Zealand
19
Sloan Digital Sky Survey, Apache Pt. Observatory, PO Box 59, Sunspot, NM 88349, USA
20
Institute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, Lithuania
21
Institutt for Fysikk, Universitetet i Tromsø, 9037 Tromsø, Norway
22
Wise Observatory, Tel Aviv University, Tel Aviv 69978, Israel
23
Institut für Theoretische Physik und Astrophysik, Universität Kiel, Germany
24
Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK
Corresponding author: B. G. Castanheira, barbara@if.ufrgs.br
Received:
6
June
2003
Accepted:
23
September
2003
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 () for 14 pulsation signals. We also compare the
determinations of effective temperature and surface gravity using the excited
modes and atmospheric methods, obtaining
± 80 K,
± 0.04 and
±
.
Key words: stars: white dwarfs / stars: variables: general / stars: oscillations / stars: individual: G 185–32 / stars: evolution
© ESO, 2004
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