Optical characterization of two cataclysmic variables: RBS 0490 and SDSS J075939.79+191417.3

Abstract

We present optical photometric and spectroscopic observations of two Cataclysmic Variables (CVs), namely RBS 0490 and SDSS J075939.79+191417.3. The optical variations of RBS 0490 have been found to occur at the period of 1.689$\pm$0.001 hr which appears to be a probable orbital period of the system. Present photometric observations of SDSS J075939.79+191417.3 confirm and refine the previously determined orbital period as 3.14240928$\pm$0.00000096 hr. The presence of long-duration eclipse features in the light curves of SDSS J075939.79+191417.3 indicates eclipses might be due to an accretion disc and bright spot. The orbital inclination of SDSS J075939.79+191417.3 is estimated to be $\sim$ 78 ${}^{\circ }$ using the eclipse morphology. The phased-light curve variations during the orbital cycle of RBS 0490 provide evidence of the emission from an independent second accretion region or a second fainter pole. Optical spectra of RBS 0490 and SDSS J075939.79+191417.3 show the presence of strong Balmer, weak He II ($\lambda$4686) emission lines, along with the detection of strong $H\beta$ emission lines with a large value of equivalent width. The characteristic features of RBS 0490 seem to favour low-field polars, while SDSS J075939.79+191417.3 appears to be similar to the non-magnetic systems.

arXiv comment13 pages, 9 figures, 5 tables, Accepted for publication in AJ

References in corpus (15)

• The Transiting Exoplanet Survey Satellite
• First Results from the Catalina Real-time Transient Survey
• The Zwicky Transient Facility: Science Objectives
• The Donor Stars of Cataclysmic Variables
• The Zwicky Transient Facility: Observing System
• SDSS unveils a population of intrinsically faint cataclysmic variables at the minimum orbital period
• Post-common-envelope binaries from SDSS. XI: The white dwarf mass distributions of CVs and pre-CVs
• Gaia Early Data Release 3: Summary of the contents and survey properties
• Cataclysmic Variables from the Catalina Real-time Transient Survey
• The Secondary Star in Cataclysmic Variables and Low Mass X-ray Binaries
• The census of cataclysmic variables in the ROSAT Bright Survey
• Hard X-ray properties of magnetic cataclysmic variables
• Variability of the Accretion Stream in the Eclipsing Polar EP Dra
• The Unusual Cataclysmic Binary Star RBS 0490 and the Space Density of Cataclysmics
• Indirect imaging of the accretion stream in eclipsing polars IV: V895 Cen