DETECTION OF EPISODIC MASS OUTFLOW IN THE NEWLY DISCOVERED HOT DO WHITE-DWARF RE-0503-289

被引：11

作者：

BARSTOW, MA ^{[1
]}

SION, EM ^{[1
]}

机构：

[1] VILLANOVA UNIV,DEPT ASTRON & ASTROPHYS,VILLANOVA,PA 19085

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1994年 / 271卷 / 03期

关键词：

STARS; ABUNDANCES; INDIVIDUAL; RE; 0503; 289; MASS-LOSS; WHITE DWARFS;

D O I：

10.1093/mnras/271.1.L52

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the unexpected detection of variable mass outflow from the very hot (T-eff = 70 000 K), He-rich DOZ1 degenerate RE 0503 - 289. This detection is based upon our analysis of absorption-line core strength variations and blueward asymmetries in two IUE echelle high-dispersion images obtained 13 months apart. The outflow has a terminal velocity of -600 km s(-1), with the PCygni-like line profiles exhibiting sharp flux declines near the rest velocity with gradual acceleration to the terminal speed. The presence of ongoing mass loss along the final white dwarf cooling tracks would significantly influence the evolution of white dwarf surface abundances.

引用

页码：L52 / L56

页数：5

共 5 条

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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1994, 267 (03) :653-659

[2] THE UV SPECTRA OF NEARBY WHITE-DWARFS AND THE NATURE OF THE LOCAL INTER-STELLAR MEDIUM [J].

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[3] HE-II LINES FROM CATACLYSMIC VARIABLE WINDS [J].

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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1994, 267 (01) :153-160

[4]

SION EM, 1989, MASS ANGULAR MOMENTU

[5]

WERNER K, 1992, ASTRON ASTROPHYS, V259, pL69

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