Long-term Periodicities of Cataclysmic Variables with Synoptic Surveys
arXiv:1706.06731 · doi:10.1088/1538-3873/aa7a99
Abstract
A systematic study on the long-term periodicities of known Galactic cataclysmic variables (CVs) was conducted. Among 1580 known CVs, 344 sources were matched and extracted from the Palomar Transient Factory (PTF) data repository. The PTF light curves were combined with the Catalina Real-Time Transient Survey (CRTS) light curves and analyzed. Ten targets were found to exhibit long-term periodic variability, which is not frequently observed in the CV systems. These long-term variations are possibly caused by various mechanisms, such as the precession of the accretion disk, hierarchical triple star system, magnetic field change of the companion star, and other possible mechanisms. We discuss the possible mechanisms in this study. If the long-term period is less than several tens of days, the disk precession period scenario is favored. However, the hierarchical triple star system or the variations in magnetic field strengths are most likely the predominant mechanisms for longer periods.
arXiv comment33 pages, 9 figures (manuscript form), Accepted for publication in PASP
References in corpus (31)
- The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
- First Results from the Catalina Real-time Transient Survey
- The Palomar Transient Factory: System Overview, Performance and First Results
- The Fourth Data Release of the Sloan Digital Sky Survey
- Exploring the Optical Transient Sky with the Palomar Transient Factory
- A Catalog and Atlas of Cataclysmic Variables - The Living Edition
- Magnetic Cycles and Rotation Periods of Late Type Stars from photometric time series
- The 2001 Superoutburst of WZ Sagittae
- Cataclysmic Variables from the Catalina Real-time Transient Survey
- Binary and Long-Term (Triple?) Modulations of 4U 182030 in NGC 6624
- The giant planet orbiting the cataclysmic binary DP Leonis
- The IPAC Image Subtraction and Discovery Pipeline for the intermediate Palomar Transient Factory
- Characterizing X-ray binary long-term variability
- Possible detection of two giant extrasolar planets orbiting the eclipsing polar UZ Fornacis
- QZ Serpentis: A Dwarf Nova with a 2-Hour Orbital Period and an Anomalously Hot, Bright Secondary Star
- Infrared spectroscopy of cataclysmic variables: III. Dwarf novae below the period gap and novalike variables
- Spectroscopy of Nine Cataclysmic Variable Stars
- Cyclical period changes in HT Cas: a clear difference between systems above and below the period gap
- Accretion-disc precession in UX Ursae Majoris
- CC Sculptoris: A superhumping intermediate polar
- Detection of superhumps in the VY Scl-type nova-like variable KR Aur
- RR Pictoris: an old nova showing superhumps and QPOs
- Hubble Space Telescope STIS Spectroscopy of Three Peculiar Nova-Like Variables: BK Lyn, V751 Cygni and V380 Oph
- Predictions for Triple Stars with and without a Pulsar in Star Clusters
- A photometric study of the newly discovered eclipsing cataclysmic variable SDSS J040714.78-064425.1
- V2051 Oph's disc evolution on decline from superoutburst
- Discovery of the high-field polar RX J1724.0+4114
- A photometric study of V1193 Ori: detection of orbital and negative superhump periods
- SuperWASP observations of long timescale photometric variations in cataclysmic variables
- The Photometric Periods of the Nova-Like Cataclysmic Variable LQ Pegasi (PG 2133+115)
- NSV 1907 - A new eclipsing, nova-like cataclysmic variable