GY Cnc

An Eclipsing Cataclysmic Variable Star

GY Cnc is an Eclipsing Dwarf Nova, a common type of Cataclysmic Variable (CV) star. It is a close binary system where a low-mass companion star transfers mass to a White Dwarf, forming an Accretion Disk. The system is observed at a high orbital inclination, which causes the companion star to periodically and regularly eclipse the bright White Dwarf and the accretion disk's central regions during its orbit. This makes it an Eclipsing CV. As a Dwarf Nova, it also exhibits typical intermittent outbursts where its brightness temporarily increases significantly due to instabilities in the accretion disk.

Photometry & Images

Catalogue Gaia
RA 137.460534921°
DEC 18.829770707°
U --
B --
V --
Parallax (mas) 3.64 ± 0.06
Light curve

TESS Data

44 45 46

AAVSO Data

aavsodataimage

Spectroscopy

Spectrum of GY Cnc

References

1. Littlefair S. P. et al. The donor star radial velocity curve in the cataclysmic variable GY Cnc confirms white dwarf eclipse modelling mass //Monthly Notices of the Royal Astronomical Society. – 2024. – Т. 527. – №. 2. – С. 4353-4358.

2. Feline W. J. et al. ULTRACAM photometry of the eclipsing cataclysmic variables GY Cnc, IR Com and HT Cas //Monthly Notices of the Royal Astronomical Society. – 2005. – Т. 364. – №. 4. – С. 1158-1167.