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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2011

The pulsations of PG 1351+489

M. Redaelli (1) , S. O. Kepler (1) , José Eduardo Costa (1) , D. E. Winget (2) , Gerald Handler (3) , B. G. Castanheira (1) , A. Kanaan (4) , L. Fraga (5) , P. Henrique (4) , O. Giovannini (6) , J. L. Provençal (7) , H. L. Shipman (7) , J. Dalessio (7) , S. E. Thompson (8) , Fergal Mullally (9) , M. M. Brewer (10) , D. Childers (11) , Mary E. Oksala (12) , R. Rosen (13) , M. A. Wood (14) , M. D. Reed (15) , B. Walter (16) , W. Strickland (16) , D. Chandler (16) , T. K. Watson (17) , R. E. Nather (2) , M. H. Montgomery (2) , A. Bischoff-Kim (18) , Candice J. Hansen (19) , A. Nitta (20) , S. J. Kleinman (20) , C. F. Claver (21) , Timothy M. Brown (22) , D. J. Sullivan (23) , S.-L. Kim (24) , Wen-Ping Chen (25) , M. Yang (25) , C.-Y. Shih (25) , X. Zhang (26) , X. Jiang (26) , J.-N. Fu (27) , S. Seetha (28) , B. N. Ashoka (28) , T. M. K. Marar (28) , Kiran S. Baliyan (29) , H. O. Vats (29) , A. V. Chernyshev (30) , P. Ibbetson (31) , E. M. Leibowitz (31) , S. Hemar (31) , A. V. Sergeev (32) , M. V. Andreev (32) , R. Janulis (33) , E. G. Meistas (33) , P. A. Moskalik (34) , G. Pajdosz (34) , A. Baran (35) , M. Winiarski (35) , S. Zola (35) , W. Ogloza (35) , M. Siwak (36) , Zs. Bognar (37) , J.-E. Solheim (38) , R. Sefako (39) , D. Buckley (39) , Darragh O'Donoghue (39) , T. Nagel (40) , R. Silvotti (41) , I. Bruni (41) , Jean-René Fremy (42, 43, 44) , Gérard Vauclair (45) , Michel Chevreton (42, 43, 44) , N. Dolez (45) , B. Pfeiffer (45) , Martin A. Barstow (46) , Orlagh L. Creevey (47) , Steven D. Kawaler (48) , J. C. Clemens (49)
1 Instituto de Física, Universidade Federal do Rio Grande do Sul
2 University of Texas at Austin [Austin]
3 IfA - Institut für Astronomie, Universität Wien
4 Departamento de Física, Universidade Federal de Santa Catarina
5 SOAR - Southern Observatory for Astrophysical Research
6 Departamento de Física e Química, Universidade de Caxias do Sul
7 Department of Physics and Astronomy, University of Delaware
8 Delaware Asteroseismic Research Center, Mt Cuba Observatory, Greenville
9 SETI Institute, NASA Ames Research Center, Moffett Field
10 William Jewell College
11 Department of Math and Science, Delaware County Community College
12 Bartol Research Institute, University of Delaware
13 NRAO - National Radio Astronomy Observatory [Green Bank]
14 Department of Physics and Space Sciences, Florida Institute of Technology [Melbourne]
15 Baker Observatory, Missouri State University
16 Meyer Observatory and Central Texas Astronomical Society, Waco
17 Southwestern University
18 Department of Chemistry, Physics and Astronomy, Georgia College and State University
19 JILA - University of Colorado, Joint Institute for Laboratory Astrophysics
20 Gemini Observatory
21 KPNO - Kitt Peak National Observatory
22 Las Cumbres Observatory, Goleta
23 Victoria University of Wellington
24 Korea Astronomy and Space Science Institute (KASI)
25 Lulin Observatory
26 National Astronomical Observatoires-CAS
27 BNU - Beijing Normal University
28 Indian Space Research Organization
29 Physical Research Laboratory, Astronomy & Astrophysics Division
30 Astronomical Institute
31 TAU - Tel Aviv University
32 Main Astronomical Observatory, Academy of Sciences of Ukraine
33 Vilnius University [Vilnius]
34 CAMK - Centrum Astronomiczne im. M. Kopernika, Warszawa
35 Mount Suhora Observatory, Cracow Pedagogical University
36 Astronomical Observatory, Jagiellonia University
37 Konkoly Observatory, Research Center for Astronomy and Earth Sciences
38 UiO - University of Oslo
39 SAAO - South African Astronomical Observatory
40 Eberhard Karls Universität Tübingen = Eberhard Karls University of Tuebingen
41 INAF-OATo - INAF-Osservatorio Astrofisico di Torino
42 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
43 Etoile
44 Ingénierie
45 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
46 Department of Astronomy, Leicester University
47 IAC - Instituto de Astrofisica de Canarias
48 Department of Physics and Astronomy, Iowa State University
49 Department of Physics and Astronomy, University of North Carolina
A. Nitta
  • Fonction : Auteur
Wen-Ping Chen
  • Fonction : Auteur
M. Yang
  • Fonction : Auteur
C.-Y. Shih
  • Fonction : Auteur
P. Ibbetson
  • Fonction : Auteur
S. Hemar
  • Fonction : Auteur
J.-E. Solheim
  • Fonction : Auteur

Résumé

PG 1351+489 is one of the 20 DBVs - pulsating helium-atmosphere white dwarf stars - known and has the simplest power spectrum for this class of star, making it a good candidate to study cooling rates. We report accurate period determinations for the main peak at 489.334 48 s and two other normal modes using data from the Whole Earth Telescope (WET) observations of 1995 and 2009. In 2009, we detected a new pulsation mode and the main pulsation mode exhibited substantial change in its amplitude compared to all previous observations. We were able to estimate the star's rotation period, of 8.9 h, and discuss a possible determination of the rate of period change of (2.0 ± 0.9) × 10-13 s s -1, the first such estimate for a DBV.
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Dates et versions

hal-03732498 , version 1 (24-10-2022)

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M. Redaelli, S. O. Kepler, José Eduardo Costa, D. E. Winget, Gerald Handler, et al.. The pulsations of PG 1351+489. Monthly Notices of the Royal Astronomical Society, 2011, 415, pp.1220-1227. ⟨10.1111/j.1365-2966.2011.18743.x⟩. ⟨hal-03732498⟩
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