The mode trapping properties of full DA white dwarf evolutionary models

被引:38
作者
Córsico, AH
Althaus, LG
Benvenuto, OG
Serenelli, AM
机构
[1] Natl Univ La Plata, Fac Ciencias Astron & Geofis, RA-1900 La Plata, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Inst Astrofis La Plata, RA-1033 Buenos Aires, DF, Argentina
关键词
stars : evolution; stars : interiors; stars : white dwarfs; stars : oscillations;
D O I
10.1051/0004-6361:20020384
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
An adiabatic, non-radial pulsation study of a 0.563 M-circle dot DA white dwarf model is presented on the basis of new evolutionary calculations performed in a self-consistent way with the predictions of time dependent element diffusion, nuclear burning and the history of the white dwarf progenitor. Emphasis is placed on the role played by the internal chemical stratification of these new models in the behaviour of the eigenmodes, and the expectations for the full g-spectrum of periods. The implications for the mode trapping properties are discussed at length. In this regard, we find that, for high periods, the viability of mode trapping as a mode selection mechanism is markedly weaker for our models, as compared with the situation in which the hydrogen-helium transition region is treated assuming equilibrium diffusion in the trace element approximation.
引用
收藏
页码:531 / 549
页数:19
相关论文
共 32 条
[1]   Evolution of a 3-M⊙ star from the main sequence to the ZZ Ceti stage:: the role played by element diffusion [J].
Althaus, LG ;
Serenelli, AM ;
Córsico, AH ;
Benvenuto, OG .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 330 (03) :685-698
[2]   Diffusion and the occurrence of hydrogen-shell flashes in helium white dwarf stars [J].
Althaus, LG ;
Serenelli, AM ;
Benvenuto, OG .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 323 (02) :471-483
[3]   A compilation of charged-particle induced thermonuclear reaction rates [J].
Angulo, C ;
Arnould, M ;
Rayet, M ;
Descouvemont, P ;
Baye, D ;
Leclercq-Willain, C ;
Coc, A ;
Barhoumi, S ;
Aguer, P ;
Rolfs, C ;
Kunz, R ;
Hammer, JW ;
Mayer, A ;
Paradellis, T ;
Kossionides, S ;
Chronidou, C ;
Spyrou, K ;
Degl'Innocenti, S ;
Fiorentini, G ;
Ricci, B ;
Zavatarelli, S ;
Providencia, C ;
Wolters, H ;
Soares, J ;
Grama, C ;
Rahighi, J ;
Shotter, A ;
Rachti, ML .
NUCLEAR PHYSICS A, 1999, 656 (01) :3-183
[4]  
Bohm-Vitense E., 1958, Z ASTROPHYS, V46, p[108, 108]
[5]   Asteroseismological constraints on the structure of the ZZ Ceti stars G117-B15A and R548 [J].
Bradley, PA .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1998, 116 (02) :307-319
[6]   Theoretical models for asteroseismology of DA white dwarf stars [J].
Bradley, PA .
ASTROPHYSICAL JOURNAL, 1996, 468 (01) :350-368
[7]   ADIABATIC PROPERTIES OF PULSATING DA WHITE-DWARFS .4. AN EXTENSIVE SURVEY OF THE PERIOD STRUCTURE OF EVOLUTIONARY MODELS [J].
BRASSARD, P ;
FONTAINE, G ;
WESEMAEL, F ;
TASSOUL, M .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1992, 81 (02) :747-794
[8]   ADIABATIC PROPERTIES OF PULSATING DA WHITE-DWARFS .1. THE TREATMENT OF THE BRUNT-VAISALA FREQUENCY AND THE REGION OF PERIOD FORMATION [J].
BRASSARD, P ;
FONTAINE, G ;
WESEMAEL, F ;
KAWALER, SD ;
TASSOUL, M .
ASTROPHYSICAL JOURNAL, 1991, 367 (02) :601-611
[9]   ADIABATIC PROPERTIES OF PULSATING DA WHITE-DWARFS .2. MODE TRAPPING IN COMPOSITIONALLY STRATIFIED MODELS [J].
BRASSARD, P ;
FONTAINE, G ;
WESEMAEL, F ;
HANSEN, CJ .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1992, 80 (01) :369-401
[10]   THE PULSATIONS OF ZZ-CETI STARS .3. THE DRIVING MECHANISM [J].
BRICKHILL, AJ .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 251 (04) :673-680