2013A&A...559A..35O


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST14:35:23

2013A&A...559A..35O - Astronomy and Astrophysics, volume 559A, 35-35 (2013/11-1)

Binaries discovered by the MUCHFUSS project. FBS 0117+396 : An sdB+dM binary with a pulsating primary.

OSTENSEN R.H., GEIER S., SCHAFFENROTH V., TELTING J.H., BLOEMEN S., NEMETH P., BECK P.G., LOMBAERT R., PAPICS P.I., TILLICH A., ZIEGERER E., FOX MACHADO L., LITTLEFAIR S., DHILLON V., AERTS C., HEBER U., MAXTED P.F.L., GAENSICKE B.T. and MARSH T.R.

Abstract (from CDS):

The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims to discover subdwarf-B stars with massive compact companions such as overmassive white dwarfs (M>1.0M), neutron stars or black holes. From the 127 subdwarfs with substantial radial-velocity variations discovered in the initial survey, a number of interesting objects have been selected for extensive follow-up. After an initial photometry run with BUSCA revealed that FBS0117+396 is photometrically variable both on long and short timescales, we chose it as an auxiliary target during a 6-night multi-color photometry run with Ultracam. Spectroscopy was obtained at a number of observatories in order to determine the binary period and obtain a radial-velocity amplitude. After establishing an orbital period of P=0.252d, and removing the signal associated with the irradiated hemisphere of the M-dwarf companion, we were able to detect ten pulsation periods in the Fourier spectrum of the light curve. Two pulsation modes are found to have short periods of 337 and 379s, and at least eight modes are found with periods between 45min and 2.5h. This establishes that FBS0117+396 is an sdB+dM reflection binary, in which the primary is a hybrid pulsator, and the first one found with this particular melange of flavours.

Abstract Copyright:

Journal keyword(s): subdwarfs - surveys - binaries: close - stars: oscillations - stars: individual: FBS 0117+396

VizieR on-line data: <Available at CDS (J/A+A/559/A35): ucam.dat merc.dat oan.dat>

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 FBS 0117+396 HS* 01 20 22.9394543891 +39 50 59.432523537   15.15 15.34     sdB 17 0
2 HE 0230-4323 HS* 02 32 54.6776909015 -43 10 27.797963721     13.78     sdB 24 0
3 Cl Melotte 20 488 HS* 03 21 39.6299805376 +47 27 18.797888080   11.54 11.73 11.83 11.55 sdB 12 0
4 KUV 04421+1416 HS* 04 44 56.8984561294 +14 21 50.176087928   15.28       sdB 22 0
5 HD 269696 HS* 05 31 40.3598545037 -69 53 02.158611829 9.74 10.92 11.15     sdB+dM 171 0
6 GALEX J063952.0+515658 HS* 06 39 52.1820981518 +51 57 01.262039165   11.84 12.00     sdB 5 0
7 V* DW Lyn HS* 07 07 09.7959993247 +60 38 50.158351555   14.7   15.34   sdB 46 1
8 GALEX J080656.7+152718 HS* 08 06 56.6844594524 +15 27 19.968716788   14.30 14.69 14.72 14.80 sdB 11 0
9 Feige 48 HS* 11 47 14.4977747924 +61 15 31.790488292   13.12 13.28     sdB 111 0
10 V* NY Vir HS* 13 38 48.1466489725 -02 01 49.209465866   13.43 13.66 13.75   sdB1VIIHe1 191 1
11 NGC 6791 OpC 19 20 53 +37 46.3   10.52 9.5     ~ 869 0
12 KIC 10139564 HS* 19 24 58.1495860117 +47 07 53.671623446           sdB 27 0
13 Kepler-451 HS* 19 38 32.6124172412 +46 03 59.139156733   12.17 12.69 12.46 12.399 sdB+dM 52 0
14 TYC 1077-218-1 * 20 13 37.6118158066 +09 28 01.412671901   12.02 12.23 12.82   ~ 4 0
15 JL 87 HS* 21 48 37.7347483725 -76 20 44.615921478 11.04 11.96 12.07     sdBHe 29 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-14:35:23

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