The minimum period problem in cataclysmic variables

被引:32
作者
Barker, J [1 ]
Kolb, U [1 ]
机构
[1] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England
关键词
binaries : close; stars : evolution; stars : mass-loss; novae; cataclysmic variables;
D O I
10.1046/j.1365-8711.2003.06323.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate whether consequential angular momentum losses or an intrinsic deformation of the donor star in cataclysmic variables (CVs) could increase the CV bounce period from the canonical theoretical value similar to65 min to the observed value P(min)approximate to77 min, and whether a variation of these effects in a CV population could wash out the theoretically predicted accumulation of systems near the minimum period (the period spike). We are able to construct suitably mixed CV model populations that a statistical test cannot rule out as the parent population of the observed CV sample. However, the good quality of the fit is never convincing, and is always slightly worse than for a simple, flat period distribution. Generally, the quality of the fit is much improved if all CVs are assumed to form at long orbital periods. The weighting suggested by King, Schenker and Hameury does not constitute an improvement if a realistically shaped input period distribution is used.
引用
收藏
页码:623 / 631
页数:9
相关论文
共 32 条
[1]  
[Anonymous], NUMERICAL RECIPES C
[2]  
[Anonymous], 1958, CLASSICAL THEORY FIE
[3]   On the late spectral types of cataclysmic variable secondaries [J].
Baraffe, I ;
Kolb, U .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 318 (02) :354-360
[4]  
DANTONA F, 2000, ASP C SER, V229, P21
[5]  
DEKOOL M, 1992, ASTRON ASTROPHYS, V261, P188
[6]  
KING AR, 1988, Q J ROY ASTRON SOC, V29, P1
[7]   Blunting the spike: the cataclysmic variable minimum period [J].
King, AR ;
Schenker, K ;
Hameury, JM .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 335 (03) :513-516
[8]   CONSEQUENTIAL ANGULAR-MOMENTUM LOSS AND THE PERIOD GAP OF CATACLYSMIC VARIABLES [J].
KING, AR ;
KOLB, U .
ASTROPHYSICAL JOURNAL, 1995, 439 (01) :330-336
[9]  
KING AR, 2002, ASP C SER, V261
[10]   Brown dwarfs and the cataclysmic variable period minimum [J].
Kolb, U ;
Baraffe, I .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 309 (04) :1034-1042