2014MNRAS.442L..61J

Query : 2014MNRAS.442L..61J

2014MNRAS.442L..61J - Mon. Not. R. Astron. Soc., 442, L61-L65 (2014/July-3)

K2 observations of the pulsating subdwarf B star EQ Piscium: an sdB+dM binary.

JEFFERY C.S. and RAMSAY G.

Abstract (from CDS):

K2, the two-wheel mission of the Kepler space telescope, observed the pulsating subdwarf B star EQ PSc during engineering tests in 2014 February. In addition to a rich spectrum of g-mode pulsation frequencies, the observations demonstrate a light variation with a period of 19.2 h and full amplitude of 2 percent. We suggest that this is due to reflection from a cool companion, making EQ Psc the longest-period member of some 30 binaries comprising a hot subdwarf and a cool dwarf companion (sdB+dM), and hence useful for exploring the common-envelope ejection mechanism in low-mass binaries.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): binaries: close - stars: individual: EQ Psc - stars: oscillations - subdwarfs - stars: variables: general

Simbad objects: 32

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Number of rows : 32
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 FBS 0117+396 HS* 01 20 22.9396883304 +39 50 59.434295604   15.15 15.34     sdB+dM 33 0
2 HE 0230-4323 HS* 02 32 54.6772339416 -43 10 27.791218308     13.78     sdB 35 0
3 Lan 30 HS* 03 28 55.2613544112 +50 35 29.669633016 13.644 14.3 14.3     sdB 19 0
4 KUV 04421+1416 HS* 04 44 56.8983457992 +14 21 50.176351836   15.28       sdB 46 0
5 HD 269696 HS* 05 31 40.3594532592 -69 53 02.153902236 9.74 10.92 11.15     sdB+dM 202 0
6 V* V470 Cam HS* 07 10 42.0513241680 +66 55 43.521505680           sdB+dM 118 0
7 FBS 0747+725 WD* 07 53 28.8623588808 +72 24 24.459543504   16.06 16.32     DA: 11 0
8 GALEX J082053.6+000843 HS* 08 20 53.5359673248 +00 08 43.502407800   15.03 15.17 15.54 15.91 sdB 48 0
9 V* XY Sex HS* 10 20 14.4716431344 -08 53 46.406162688   14.46 14.43     sdB 40 0
10 ASAS J102322-3737.0 HS* 10 23 21.8946607008 -37 36 59.909184792   11.43 11.51     sdB+dM 30 0
11 EC 10246-2707 HS* 10 26 56.4747793032 -27 22 57.097779564   14.56 14.77 14.85   sdB+dM 31 0
12 Feige 48 HS* 11 47 14.4978515760 +61 15 31.789400364   13.12 13.28     sdB 125 0
13 BD-07 3477 HS* 12 44 20.2386233232 -08 40 16.846099536   10.46 10.594 10.895   sdB2VIIHe3 303 1
14 Feige 81 HS* 13 31 53.5517863824 +15 41 17.573728740   13.24 13.507     sdBpec 53 0
15 V* NY Vir HS* 13 38 48.1466908176 -02 01 49.207286748   13.43 13.66 13.75   sdB1VIIHe1 237 1
16 PG 1438-029 HS* 14 40 52.8282561960 -03 08 52.656678456   13.64 13.79 14.23   sdBHe0 24 0
17 FBS 1531+381 HS* 15 33 49.4441301600 +37 59 28.095378720     13.08     sdB+dM 52 0
18 PG 1621+476 HS* 16 22 56.6652852936 +47 30 51.128501040   16.07 16.19     sdB+dM 61 0
19 OGLE BUL-SC16 335 * 18 09 48.2260900608 -26 41 49.486723692       16.04   M 18 1
20 GALEX J190221.9+485052 HS* 19 02 21.9425643552 +48 50 52.195229160   17.1   17.1   sdB+dM 36 0
21 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
22 ATO J291.5394+37.3356 HS* 19 26 09.4422931056 +37 20 08.163008556   13.60 13.63 14.05 13.96 sdB+dM 41 0
23 SDSS J192715.88+380808.2 HS* 19 27 15.8823018024 +38 08 08.280985956   16.3   16.9   sdB+dM 30 0
24 KPD 1930+2752 HS* 19 32 14.8088063952 +27 58 35.445679608 12.80 13.75 13.82     sdB 167 0
25 Kepler-451 HS* 19 38 32.6123816016 +46 03 59.135231952   12.17 12.69 12.46 12.399 sdB+dM 103 0
26 V* V1828 Aql HS* 20 20 00.4587151080 +04 37 56.517736296   12.9   13.34   sdOB+dM 77 1
27 HS 2043+0615 HS* 20 46 20.7938414832 +06 26 25.336612716   16.9   16.20   sdB 15 0
28 JL 82 HS* 21 36 01.2957494184 -72 48 27.222290172 11.26 12.44 12.41 12.67   sdB 42 0
29 HS 2231+2441 HS* 22 34 21.4832585640 +24 56 57.392918196     14.20     sdB+dM 58 0
30 PG 2303+019 HS* 23 06 22.3561075224 +02 09 05.952751128   16.2 16.23 16.2   sdB 20 0
31 V* EQ Psc HS* 23 34 34.6314973464 -01 19 36.929325288   12.823 12.780 13.556 13.243 sdB 34 0
32 HS 2333+3927 HS* 23 35 42.5025647712 +39 44 27.064626936     14.53     sdOB 48 0

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