2018A&A...617A..16S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST06:20:11

2018A&A...617A..16S - Astronomy and Astrophysics, volume 617A, 16-16 (2018/9-1)

Catching VY Sculptoris in a low state.

SCHMIDTOBREICK L., MASON E., HOWELL S.B., LONG K.S., PALA A.F., POINTS S. and WALTER F.M.

Abstract (from CDS):


Context.In the context of a large campaign to determine the system parameters of high mass transfer cataclysmic variables, we found VY Scl in a low state in 2008.
Aims. Making use of this low state, we study the stellar components of the binary with little influence of the normally dominating accretion disc.
Methods. Time-resolved spectroscopy and photometry of VY Scl taken during the low state are presented. We analysed the lightcurve and radial velocity curve and use time-resolved spectroscopy to calculate Doppler maps of the dominant emission lines.
Results. The spectra show narrow emission lines of Hα, Hβ, HeI, NaI D, and FeII, as well as faint TiO absorption bands that trace the motion of the irradiated secondary star, and Hα and HeI emission line wings that trace the motion of the white dwarf. From these radial velocities, we find an orbital period of 3.84h, and put constraints on binary parameters such as the mass ratio M2/M1 of 0.43 and the inclination of 15°. With a secondary's mass between 0.3 and 0.35M, we derive the mass for the white dwarf as M1=0.6-1.1M.

Abstract Copyright: © ESO 2018

Journal keyword(s): accretion, accretion disks - binaries: spectroscopic - novae, cataclysmic variables - stars: individual: VY Scl

VizieR on-line data: <Available at CDS (J/A+A/617/A16): hjd.dat rvnad.dat rvtio.dat rvfeii.dat rvhe5876.dat rvhe6675.dat rvhe7065.dat rvha1.dat rvha2.dat rvhb.dat fits/*>

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 - 2020
#notes
1 V* BB Dor No* 05 29 28.5850788827 -58 54 46.184997516 13.68 15.57 15.52 14.83   ~ 38 0
2 V* DQ Her No* 18 07 30.2510755201 +45 51 32.564649735   12.99 15.16 11.46   M3+Ve 960 1
3 GD 1662 NL* 23 29 00.4711137193 -29 46 45.980626470           OBe 142 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-06:20:11

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