Hydrogen in hot subdwarfs formed by double helium white dwarf mergers
作者： Philip D. Hall , C. Simon Jeffery
关键词:
摘要: Isolated hot subdwarfs might be formed by the merging of two helium-core white dwarfs. Before merging, dwarfs have hydrogen-rich envelopes and some this hydrogen may survive merger. We calculate mass that is present at start such mergers and, with assumption mixed throughout disrupted dwarf in merger process, estimate how much can survive. find a up to about $2 \times 10^{-3}\,\mathrm{M}_{\odot}$ remnants. make model remnants include appropriate their total compare atmospheric parameters sample apparently isolated subdwarfs, sdBs. The majority these stars explained as double helium mergers.
core.ac.uk
arxiv.org
harvard.edu
arxiv-vanity.com参考文章(144)
J. P. Cox, R. T. Giuli, Principles of stellar structure Principles of stellar structure. ,(1968)
Icko, Jr. Iben, Common envelope formation and the merging of degenerate dwarf binaries The Astrophysical Journal. ,vol. 324, pp. 355- 362 ,(1988) , 10.1086/165900
Icko, Jr. Iben, On the consequences of low-mass white dwarf mergers The Astrophysical Journal. ,vol. 353, pp. 215- 235 ,(1990) , 10.1086/168609
C. Simon Jeffery, C. Simon Jeffery, Xianfei Zhang, Can R Coronae Borealis stars form from the merger of two helium white dwarfs Monthly Notices of the Royal Astronomical Society: Letters. ,vol. 426, ,(2012) , 10.1111/J.1745-3933.2012.01330.X
N. Grevesse, A.J. Sauval, Standard Solar Composition Space Science Reviews. ,vol. 85, pp. 161- 174 ,(1998) , 10.1023/A:1005161325181
W. Raphael Hix, Alexei M. Khokhlov, J. Craig Wheeler, Friedrich‐Karl Thielemann, The QSE-reduced \alpha Network arXiv: Astrophysics. ,(1998) , 10.1086/305968
Stéphane Vennes, Adéla Kawka, Péter Németh, A selection of hot subluminous stars in the GALEX survey – II. Subdwarf atmospheric parameters† Monthly Notices of the Royal Astronomical Society. ,vol. 427, pp. 2180- 2211 ,(2012) , 10.1111/J.1365-2966.2012.22009.X
Marius Dan, Stephan Rosswog, Marcus Brüggen, Philipp Podsiadlowski, The structure and fate of white dwarf merger remnants Monthly Notices of the Royal Astronomical Society. ,vol. 438, pp. 14- 34 ,(2014) , 10.1093/MNRAS/STT1766
G. E. Brown, Neutron Star Accretion and Binary Pulsar Formation The Astrophysical Journal. ,vol. 440, pp. 270- 279 ,(1995) , 10.1086/175268
Hans Van Winckel, Post-AGB Stars Annual Review of Astronomy and Astrophysics. ,vol. 41, pp. 391- 427 ,(2003) , 10.1146/ANNUREV.ASTRO.41.071601.170018