2014A&A...562A..95G


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.22CEST15:33:46

2014A&A...562A..95G - Astronomy and Astrophysics, volume 562A, 95-95 (2014/2-1)

Orbital solutions of eight close sdB binaries and constraints on the nature of the unseen companions.

GEIER S., OSTENSEN R.H., HEBER U., KUPFER T., MAXTED P.F.L., BARLOW B.N., VUCKOVIC M., TILLICH A., MUELLER S., EDELMANN H., CLASSEN L. and McLEOD A.F.

Abstract (from CDS):

The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars (sdBs) with massive compact companions such as white dwarfs, neutron stars, or stellar-mass black holes. In a supplementary programme we obtained time-resolved spectroscopy of known hot subdwarf binary candidates. Here we present orbital solutions of eight close sdB binaries with orbital periods ranging from ∼0.1d to 10d, which allow us to derive lower limits on the masses of their companions. Additionally, a dedicated photometric follow-up campaign was conducted to obtain light curves of the reflection-effect binary HS 2043+0615. We are able to constrain the most likely nature of the companions in all cases but one, making use of information derived from photometry and spectroscopy. Four sdBs have white dwarf companions, while another three are orbited by low-mass main sequence stars of spectral type M.

Abstract Copyright:

Journal keyword(s): binaries: spectroscopic - subdwarfs

VizieR on-line data: <Available at CDS (J/A+A/562/A95): table1.dat rv.dat>

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PG 2359+197 HS* 00 02 08.4740092058 +19 59 13.139488666   14.40       sdB 11 0
2 FBS 0117+396 HS* 01 20 22.9394543891 +39 50 59.432523537   15.15 15.34     sdB 18 0
3 HE 0230-4323 HS* 02 32 54.6776909015 -43 10 27.797963721     13.78     sdB 25 0
4 V* IQ Cam HS* 04 26 06.8650071405 +54 28 17.100742176 14.21 14.86 14.66     sdB 58 0
5 KUV 04421+1416 HS* 04 44 56.8984561294 +14 21 50.176087928   15.28       sdB 24 0
6 Ton 22 HS* 09 43 54.5491806280 +27 46 59.171256831   12.95 13.24     sdB 14 0
7 BD-07 3477 HS* 12 44 20.2386520980 -08 40 16.848587212   10.46 10.594 10.895   sdB2VIIHe3 260 1
8 V* NY Vir HS* 13 38 48.1466489725 -02 01 49.209465866   13.43 13.66 13.75   sdB1VIIHe1 199 1
9 V* V361 Hya ** 14 05 33.00 -27 01 34.1   15.45 15.26 15.16   sdB+ 110 0
10 CD-30 11223 HS* 14 11 16.1539612427 -30 53 03.692295694   11.90 11.90     sdB+DA 48 0
11 HE 1415-0309 HS* 14 18 20.9258199665 -03 22 53.996510033   16.6   16.3   sdB 8 0
12 OGLE BUL-SC16 335 HS* 18 09 48.2261053694 -26 41 49.488098209       16.04   sdB+dM 16 0
13 KPD 1946+4340 HS* 19 47 42.8878643002 +43 47 30.757113602 13.05 14.06 14.23 14.92   sdOB+D 50 0
14 HS 2043+0615 HS* 20 46 20.7938017614 +06 26 25.337245421   16.9   16.20   sdB 10 0
15 BPS CS 22879-0149 HS* 20 57 15.2707354393 -38 11 51.424436356 13.11 14.11 14.24 14.61   sdB 7 0
16 LB 1516 HS* 23 01 56.1479060808 -48 03 48.478650608   12.74 13.02     sdB 26 0
17 PG 2345+318 HS* 23 48 07.5062970948 +32 04 48.037660206   13.99 14.19 14.66   sdB 27 0

    Equat.    Gal    SGal    Ecl

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2021.06.22-15:33:46

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