2018MNRAS.473..693V

Query : 2018MNRAS.473..693V

2018MNRAS.473..693V - Mon. Not. R. Astron. Soc., 473, 693-709 (2018/January-1)

Composite hot subdwarf binaries - I. The spectroscopically confirmed sdB sample.

VOS J., NEMETH P., VUCKOVIC M., OSTENSEN R. and PARSONS S.

Abstract (from CDS):

Hot subdwarf-B (sdB) stars in long-period binaries are found to be on eccentric orbits, even though current binary-evolution theory predicts that these objects are circularized before the onset of Roche lobe overflow (RLOF). To increase our understanding of binary interaction processes during the RLOF phase, we started a long-term observing campaign to study wide sdB binaries. In this paper, we present a sample of composite binary sdBs, and the results of the spectral analysis of nine such systems. The grid search in stellar parameters (GSSP) code is used to derive atmospheric parameters for the cool companions. To cross-check our results and also to characterize the hot subdwarfs, we used the independent XTGRID code, which employs TLUSTY non-local thermodynamic equilibrium models to derive atmospheric parameters for the sdB component and PHOENIX synthetic spectra for the cool companions. The independent GSSP and XTGRID codes are found to show good agreement for three test systems that have atmospheric parameters available in the literature. Based on the rotational velocity of the companions, we make an estimate for the mass accreted during the RLOF phase and the minimum duration of that phase. We find that the mass transfer to the companion is minimal during the subdwarf formation.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - binaries: spectroscopic - stars: fundamental parameters - stars: horizontal branch - stars: mass-loss - subdwarfs - subdwarfs

Simbad objects: 36

goto Full paper

goto View the references in ADS

Number of rows : 36
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SB 7 HS* 00 03 24.4387214592 -16 21 06.386941404   12.6 12.7     sdBHe0+F/G 27 0
2 Ton S 155 HS* 00 23 59.3423963568 -23 09 53.796509928   16.00 15.94 16.04   sdB 18 0
3 MCT 0029-4054 HS* 00 31 36.4296552576 -40 37 55.035509448   14.80 14.72 14.78   sdBHe1+F/G 9 0
4 PB 6148 SB* 00 45 21.4894755576 +07 06 11.017989468   12.69 12.15 12.19   F+sd? 5 0
5 BD-11 162 HS* 00 52 15.0688737672 -10 39 46.074306924 9.987 11.102 11.184 11.133 11.039 sdO+G 48 0
6 PB 8555 ** 01 10 12.704760 -14 07 57.80424   12.61 12.31 12.26   sdBHe0+F/G 12 1
7 PG 0110+262 HS* 01 13 14.8740411528 +26 27 31.247071416   13.000 12.875 12.913   sdB+G0V 26 0
8 PB 6355 HS* 01 16 27.3119638104 +06 03 11.610863712   13.27 13.04 13.04   sdB+F6V 10 0
9 V* EO Cet HS* 01 23 43.2471248112 -05 05 45.831024564   12.21 12.65     sdOV+F4V 68 0
10 HS 0127+3146 HS* 01 29 52.6088842008 +32 02 09.715096860     14.423     sdB+? 14 1
11 PHL 1079 HS* 01 38 26.9920350720 +03 39 39.089787300   12.4 12.6     sdB+G7V 25 0
12 SB 744 HS* 01 48 44.0374557768 -26 36 12.821580144   12.28 12.31     sdO7He1+F/G 53 0
13 PB 8949 HS* 01 56 42.4338931728 -06 55 40.150812828   15.90 16.04 15.72   sdB 15 0
14 JL 277 HS* 02 01 34.3581667680 -53 43 43.531744944   13.181 13.091 13.352   sdB+G 12 0
15 GALEX J022836.7-362543 HS* 02 28 36.8610032712 -36 25 45.686665920   13.63 13.54 13.72   sdB+K0 5 0
16 1RXS J022917.1-395851 CV* 02 29 16.9431648984 -39 59 01.649985936   13.61 13.55 13.48 15.67 ~ 9 0
17 EC 03143-5945 HS* 03 15 30.0668968296 -59 34 04.938127608 12.79 13.477 13.376 13.542   sdB 12 0
18 Ton S 367 * 03 39 47.9428272696 -24 59 13.315231212   14.00 13.83 13.94   ~ 3 0
19 EC 03563-3618 HS* 03 58 14.8297287874 -36 09 38.453063031 13.36 13.918 13.600 13.686   sdB+F 6 1
20 HE 0430-2457 HS* 04 33 03.8447430432 -24 51 19.736820828 13.29 14.104 14.119 14.283   sdB(+F?) 15 0
21 CD-28 1974 ** 05 07 20.178432 -28 02 24.88308 11.06 11.793 11.697 11.744   sdB+F 16 0
22 BD+34 1543 HS* 07 10 07.7039318016 +34 24 53.808705504   10.29 10.17     sdB+F? 34 0
23 GALEX J071029.4+233322 HS* 07 10 29.3618937552 +23 33 22.543535160   14.25 14.34 14.55   sdO+F6V 8 0
24 PG 0948+041 HS* 09 51 01.2879260424 +03 47 56.959039356   15.770 15.895 16.059   sdB+D 33 0
25 Balloon 110607002 WD? 12 23 48.6229420464 +01 17 07.087280784   13.30 12.72 12.66   DA/sdB+K0? 2 0
26 EC 12473-3046 ** 12 50 02.077920 -31 02 55.25124   13.83 13.74 13.86   ~ 4 0
27 Ton 139 HS* 12 56 04.893960 +28 07 19.51716   12.922 12.759 12.866   sdB+F8V 54 0
28 Feige 87 HS* 13 40 14.6950103088 +60 52 47.566392996   11.56 11.71     sdB+G4V 49 0
29 Balloon 82800003 WD? 15 15 38.3465039784 +56 53 43.746923868   11.57 11.42 11.8   DA/sdB+K1? 16 0
30 EGGR 440 HS* 15 17 14.2689024744 +03 10 27.945158844 13.033 14.04 13.99 14.24 13.785 sdOB+G1V 35 0
31 BPS BS 16559-0077 HS* 15 24 03.0361794768 +01 34 21.712139508   13.993 13.961 14.083   sdB+K1V 18 0
32 PG 1629+081 HS* 16 32 01.3561336032 +07 59 40.037913528   12.611 12.762 13.122   sdBO 23 0
33 PG 1647+056 HS* 16 50 18.4606586856 +05 32 56.016804984 13.536 14.600 14.773 14.831 14.855 sdB 16 0
34 BD+29 3070 HS* 17 38 21.2004399672 +29 08 47.348080656   10.55 10.45     sdOB+F/G 35 0
35 Ton S 111 HS* 23 42 41.4167798640 -27 50 01.757927904   14.87 15.01 15.35   sdBHe1+F/G? 14 0
36 Ton S 131 HS* 23 59 07.1389258440 -26 38 39.934916844     13.5     sdBHe0+F/G 20 0

To bookmark this query, right click on this link: simbad:objects in 2018MNRAS.473..693V and select 'bookmark this link' or equivalent in the popup menu