Time‐Resolved Spectroscopy and Photometry of CT Serpentis and V825 Herculis

Autor:	David S. Reynolds, F. A. Ringwald, Daniel W. Chase
Rok vydání:	2005
Předmět:	Radial velocity Physics Photometry (optics) Space and Planetary Science Astronomy Astronomy and Astrophysics Astrophysics Time-resolved spectroscopy Spectroscopy Orbital period Light curve Dwarf nova
Zdroj:	Publications of the Astronomical Society of the Pacific. 117:1223-1229
ISSN:	1538-3873 0004-6280
DOI:	10.1086/491721
Popis:	Time-resolved spectroscopy and photometry of two cataclysmic variables (CVs) are presented. A radial velocity study shows CT Ser (Nova Ser 1948) has an orbital period of 0.195 ± 0.002 days. Its light curve shows only erratic flickering. A radial velocity study shows that V825 Her (PG 1717+413) has an orbital period of 0.206 ± 0.002 days. This CV's spectrum is similar to that of a dwarf nova in outburst, or an old nova: the long-term light curve shows only small, "stunted" outbursts, so it is likely to be a luminous nova-like CV, similar to a dwarf nova stuck in outburst all the time. We use time-resolved photometry to discover quasi-periodic oscillations (QPOs), with periods between 15 and 24 minutes, not unlike those seen in other luminous CVs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b88786ed612a3682afac3c76b026bfaf https://doi.org/10.1086/491721 Zobrazit plný text záznamu