2001PASP..113...72P


Query : 2001PASP..113...72P

2001PASP..113...72P - Publ. Astron. Soc. Pac., 113, 72-81 (2001/January-0)

Superhumps in cataclysmic binaries. XX. V751 Cygni.

PATTERSON J., THORSTENSEN J.R., FRIED R., SKILLMAN D.R., COOK L.M. and JENSEN L.

Abstract (from CDS):

We report photometric and spectroscopic observations of the nova-like variable V751 Cygni. The radial velocities indicate an underlying binary period of 0.1445(2) day; the long-term cycle count is not firmly decided, but the best choice implies a period of 0.144464(1) day. The star shows a moderately low excitation spectrum with transient P Cygni absorption suggestive of a wind origin, occasionally seen in cataclysmic variables accreting at a high rate. Curiously, the P Cygni absorption appears correlated with binary phase in our two most extensive data sets. A photometric wave with P=0.1394(1) day, slightly shorter than Porb, rumbles through the light curve, as well as a low-frequency wiggle at 3.94(6) days. We identify the former as a ``negative superhump'' and the latter as the wobble period of a tilted accretion disk. These characteristics all suggest classification as an ordinary, accretion-powered cataclysmic variable of the VY Sculptoris class. We discuss possible origins for the observed soft X-rays at quiescence.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Novae, Cataclysmic Variables - stars: individual (V751 Cygni)

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 EGB 4 CV* 06 29 33.9600353880 +71 04 36.394613580   13.29 13.27 13.04   ~ 156 0
2 IC 5070 HII 20 51.0 +44 22           ~ 206 1
3 EM* LkHA 170 Ae* 20 52 12.7783926120 +44 19 26.086865808   14.958 14.578 14.261   A0e 116 0

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