1998A&A...336..626G

Query : 1998A&A...336..626G

1998A&A...336..626G - Astronomy and Astrophysics, volume 336626-636 (1998/8-2)

Soft X-ray emission of VY Sculptoris stars during optical high state.

GREINER J.

Abstract (from CDS):

I have collected all available ROSAT observations of VY Scl stars including those during the all-sky survey to investigate the presence, strength and spectrum of soft X-ray emission (0.1-2.4keV) of this group of nova-like variables. A total of 9 out of the 14 VY Scl stars are detected with ROSAT, mostly during optical high states. Interestingly, all detections during the optical high state have very similar X-ray spectral characteristics. I find that a simple blackbody model gives a reasonably good fit in all cases, with temperatures falling in the narrow range between 0.25-0.5keV. Possible emission mechanisms are discussed.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - instabilities - X-rays: stars - stars: novae, cataclysmic variables

Simbad objects: 14

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Number of rows : 14
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 V* PX And CV* 00 30 05.8083597744 +26 17 26.437695936   15.38 14.88 14.69   ~ 124 0
2 V* TT Ari CV* 02 06 53.0797508832 +15 17 41.851038804   10.73 10.20     Bep: 459 0
3 V* KR Aur CV* 06 15 43.9189295136 +28 35 08.553579540           ~ 170 0
4 EGB 4 CV* 06 29 33.9600353880 +71 04 36.394613580   13.29 13.27 13.04   ~ 170 0
5 PG 0818+513 CV* 08 22 36.0475955184 +51 05 24.558779364   15.73       ~ 127 0
6 V* DW UMa CV* 10 33 52.8751411128 +58 46 54.717259044   14.33   14.33 14.35 ~ 254 0
7 V* LX Ser CV* 15 38 00.0938074584 +18 52 03.244681812     15.06     G8Ve 162 0
8 V* V442 Oph CV* 17 32 15.1362474864 -16 15 22.068343152       14.120   ~ 93 0
9 V* MV Lyr CV* 19 07 16.2886463256 +44 01 07.869892008   13.040 12.920 12.489 12.578 M5Ve 307 0
10 V* V794 Aql CV* 20 17 33.9158772576 -03 39 50.960495196           ~ 105 0
11 EM* LkHA 170 Ae* 20 52 12.7783926120 +44 19 26.086865808   14.958 14.578 14.261   A0e 124 0
12 V* V425 Cas CV* 23 03 46.6579196928 +53 17 14.863773048           ~ 58 0
13 GD 1662 CV* 23 29 00.4713595416 -29 46 45.980660100   13.054 12.980 13.099   OBe 191 0
14 V* VZ Scl CV* 23 50 09.2550871008 -26 22 52.701610656           ~ 85 0

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