Discovery of ZZ Cetis in detached white dwarf plus main-sequence binaries

被引：18

作者：

Pyrzas, S. ^{[1
]}

Gaensicke, B. T. ^{[2
]}

Hermes, J. J. ^{[2
]}

Copperwheat, C. M. ^{[3
]}

Rebassa-Mansergas, A. ^{[4
]}

Dhillon, V. S. ^{[5
]}

Littlefair, S. P. ^{[5
]}

Marsh, T. R. ^{[2
]}

Parsons, S. G. ^{[6
]}

Savoury, C. D. J. ^{[5
]}

Schreiber, M. R. ^{[6
]}

Barros, S. C. C. ^{[7
]}

Bento, J. ^{[8
]}

Breedt, E. ^{[2
]}

Kerry, P. ^{[5
]}

机构：

[1] Univ Catolica Norte, Inst Astron, Antofagasta, Chile

[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[3] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England

[4] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China

[5] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[6] Univ Valparaiso, Dept Fis & Astron, Valparaiso, Chile

[7] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[8] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 447卷 / 01期

基金：

欧洲研究理事会; 中国国家自然科学基金;

关键词：

asteroseismology; binaries: close; binaries: eclipsing; stars: low-mass; white dwarfs; COMMON-ENVELOPE BINARIES; DIGITAL-SKY-SURVEY; EXTREMELY LOW-MASS; INSTABILITY STRIP; ORBITAL PERIOD; SDSS; EVOLUTION; STARS; PULSATIONS;

D O I：

10.1093/mnras/stu2412

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first results of a dedicated search for pulsating white dwarfs (WDs) in detached WD plus main-sequence (MS) binaries. Candidate systems were selected from a catalogue of WD+ MS binaries, based on the surface gravities and effective temperatures of the WDs. We observed a total of 26 systems using ULTRACAM mounted on ESO's 3.5 m New Technology Telescope at La Silla. Our photometric observations reveal pulsations in seven WDs of our sample, including the first pulsating WD with an MS companion in a post-common envelope (CE) binary, SDSS J1136+0409. Asteroseismology of these new pulsating systems will provide crucial insight into how binary interactions, particularly the CE phase, affect the internal structure and evolution of WDs. In addition, our observations have revealed the partially eclipsing nature of one of our targets, SDSS J1223-0056.

引用

页码：691 / 697

页数：7

共 70 条

[1]

Althaus LG, 2010, ASTRON ASTROPHYS REV, V18, P471, DOI [10.1007/s00159-010-0033-, 10.1007/s00159-010-0033-1]

[2] Pulsational instabilities in accreting white dwarfs [J].