Cataclysmic Variables from SDSS VII. The Seventh Year (2006)

TL;DR

This paper reports the discovery and analysis of 39 cataclysmic variables from SDSS spectra, providing new orbital period estimates and identifying various subclasses such as Polars and eclipsing systems.

Contribution

It presents the seventh-year data of SDSS CVs, including new discoveries, classifications, and orbital period estimates, expanding the catalog of known cataclysmic variables.

Findings

39 CVs identified from SDSS spectra in 2006

3 orbital periods estimated from follow-up observations

Identification of new Polars and eclipsing systems

Abstract

Coordinates, magnitudes and spectra are presented for 39 cataclysmic variables found in Sloan Digital Sky Survey spectra that were primarily obtained in 2006. Of these, 12 were CVs identified prior to the SDSS spectra (GY Cnc, GO Com, ST LMi, NY Ser, MR Ser, QW Ser, EU UMa, IY UMa, HS1340+1524, RXJ1610.1+0352, Boo 1, Leo 5). Follow-up spectroscopic observations of seven systems (including one from year 2005 and another from year 2004) were obtained, resulting in estimates of the orbital periods for 3 objects. The new CVs include two candidates for high inclination, eclipsing systems, 4 new Polars and three systems whose spectra clearly reveal atmospheric absorption lines from the underlying white dwarf.