2012MNRAS.421.2769J


Query : 2012MNRAS.421.2769J

2012MNRAS.421.2769J - Mon. Not. R. Astron. Soc., 421, 2769-2773 (2012/April-3)

The short-period limit of contact binaries.

JIANG D., HAN Z., GE H., YANG L. and LI L.

Abstract (from CDS):

The stability of mass transfer is important in the formation of contact binaries from detached binaries when the primaries of the initially detached binaries fill their Roche lobes. Using Eggleton's stellar evolution code, we investigate the formation and the short-period limit of contact binaries by considering the effect of the instability of mass transfer. It is found that with decreasing initial primary mass from 0.89 to 0.63 M, the range of the initial mass ratio decreases for detached binaries that experience stable mass transfer and evolve into contact. If the initial primary mass is less than 0.63 M, detached binaries would experience dynamically unstable mass transfer when the primaries of detached binaries fill their Roche lobes. These systems would evolve into a common envelope situation and probably then to a complete merger of two components on a quite short time-scale. This results in a low mass limit at about 0.63 M for the primary mass of contact binaries, which might be the main reason why the period distribution of contact binaries has a short limit of about 0.22 d. By comparing the theoretical period distribution of contact binaries with the observational data, it is found that the observed contact binaries are above the low mass limit for the primary mass of contact binaries and no observed contact binaries are below this limit. This suggests that the short-period limit of contact binaries can be explained by the instability of the mass transfer that occurs when the primaries of the initially detached binaries fill their Roche lobes.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): instabilities - binaries: close - binaries: eclipsing - stars: evolution - stars: formation

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* BH Cas EB* 00 21 21.3765836256 +59 09 05.416013484   13.26 12.77     K4V 51 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3747 0
3 Cl* NGC 104 WSB V34 EB* 00 24 49.296 -71 56 19.84           ~ 10 0
4 V* V523 Cas EB* 00 40 06.2679105096 +50 14 15.518292216       10.405   K4V 162 0
5 NSVS 6507557 EB* 01 58 23.8767983544 +25 21 19.688871456   14.53 12.80     K9+M3 17 0
6 V* BX Tri EB* 02 20 50.850720 +33 20 47.55228   14.86 13.37 12.98 10.98 M2e 45 0
7 StKM 1-258 RS* 02 22 25.8585919224 +47 29 19.824973008   12.67 11.57     M0 22 0
8 2MASS J04463285+1901432 EB* 04 46 32.8622247312 +19 01 43.246330320   19.9 19.0     M 24 0
9 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 842 0
10 StKM 1-704 EB* 08 31 27.877776 +19 53 03.50628   11.52 10.38 10.04 9.125 K4 40 0
11 NSVS 7446320 EB* 09 16 12.2710150128 +36 15 33.524519148     13.012     M2 13 0
12 V* XY Leo EB* 10 01 40.4170488672 +17 24 32.602180644   10.66 9.68   8.474 K0V 269 0
13 V* CC Com EB* 12 12 06.0378799056 +22 31 58.682832024   13.09 11.42   10.085 K4/5V 208 0
14 FBS 1345+796 EB* 13 45 34.8710774664 +79 23 48.290145432     13.363 13.074   M4/5 40 0
15 V* TZ Boo EB* 15 08 09.1351483800 +39 58 12.863284788   10.60       G2Vn 200 0
16 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 91 0
17 V* FI Boo EB* 15 22 05.9658394344 +51 10 55.308179280   10.16 9.49     G5 52 0
18 V* V829 Her EB* 16 55 47.876544 +35 10 57.65916   10.96 10.33 10.12   G2V 69 0
19 OGLE BW3 V38 EB* 18 04 44.2025491872 -30 09 05.497738668     18.300   16.3335 ~ 42 0
20 V* FS CrA EB* 18 06 12.1976558568 -37 31 29.638682040           ~ 18 0
21 V* FG Sct EB* 18 45 03.6523226328 -06 06 15.512600268           ~ 28 0
22 V* BI Vul EB* 21 22 48.0350619264 +27 01 39.846690516           ~ 51 0
23 V* VZ Psc EB* 23 27 48.3881626645 +04 51 23.937175287   11.39 10.274 10.090 8.926 K4/5V 109 0

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2022.09.26-07:16:19

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