English

ASAS J071404+7004.3 -- a close, bright nova-like cataclysmic variable with gusty winds

Solar and Stellar Astrophysics 2021-12-22 v2 High Energy Astrophysical Phenomena

Abstract

Despite being bright (V=12V=12) and nearby (d=212d=212 pc) ASAS J071404+7004.3 has only recently been identified as a nova-like cataclysmic variable. We present time-resolved optical spectroscopy obtained at the Isaac Newton Telescope together with Swift\textit{Swift} X-ray and ultraviolet observations. We combined these with TESS\textit{TESS} photometry and find a period of 3.28h and a mass transfer rate of 49×109Msun/yr4-9 \times 10^{-9} M_{sun}/yr. Historical photometry shows at least one low state establishing the system as a VY Scl star. Our high-cadence spectroscopy also revealed rapidly changing winds emanating from the accretion disc. We have modelled these using the Monte Carlo PYTHON code and shown that all the emission lines could emanate from the wind - which would explain the lack of double-peaked lines in such systems. In passing,we discuss the effect of variability on the position of cataclysmic variables in the Gaia\textit{Gaia} Hertzsprung-Russell diagram.

Keywords

Cite

@article{arxiv.2109.14514,
  title  = {ASAS J071404+7004.3 -- a close, bright nova-like cataclysmic variable with gusty winds},
  author = {keith Inight and Boris Gaensicke and Dominic Blondel and David Boyd and Richard Ashley and Christian Knigge and Knox Long and Tom Marsh and Jack McCleery and Simone Scaringi and Danny Steeghs and John Thorstensen and Tonny Vanmunster and Peter Wheatley},
  journal= {arXiv preprint arXiv:2109.14514},
  year   = {2021}
}

Comments

Accepted for publication by MNRAS. 20 pages, 14 figures