1H0551 - 819: discovery of a new cataclysmic variable from the HEAO-1 Survey

Autor:	Brian Warner, Denis J. Sullivan, Ron Remillard, D. A. H. Buckley, I. R. Tuohy
Rok vydání:	1993
Předmět:	Radial velocity Physics Photometry (optics) Intermediate polar Space and Planetary Science Astronomy Cataclysmic variable star Astronomy and Astrophysics Astrophysics Emission spectrum Orbital period Light curve Astronomical spectroscopy
Zdroj:	Monthly Notices of the Royal Astronomical Society. 265:926-940
ISSN:	1365-2966 0035-8711
DOI:	10.1093/mnras/265.4.926
Popis:	We report the discovery of a cataclysmic variable that was detected as an X-ray source by the HEAO-1 modulation collimator. The spectrum is typical of a weak-lined nova-like system, with moderately strong He II λ4686-A emission (∼0.3 Hβ) and a very blue continuum. Extensive photometric observations (∼94 h in total) from 1989 February to 1990 March reveal the presence of a 3.34-h quasi-sinusoidal, ∼5 per cent modulation. We confirm with a radial velocity study that this variation occurs at, or very near to, the orbital period. Furthermore, the relative phasing of the photometry and emission-line velocities, and the light curve structure, points to a similar origin to that proposed for several other X-ray-selected CVs (e.g. AO Psc and FO Aqr), namely an X-ray-illuminated disc bright-spot
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d91d8b1f31bdfcebb8da9583999e3e0 https://doi.org/10.1093/mnras/265.4.926 Zobrazit plný text záznamu