TY - JOUR
T1 - Long-term periodicities of cataclysmic variables with synoptic surveys
AU - Yang, Michael Ting Chang
AU - Chou, Yi
AU - Ngeow, Chow Choong
AU - Hu, Chin Ping
AU - Su, Yi Hao
AU - Prince, Thomas A.
AU - Kulkarni, Shrinivas R.
AU - Levitan, David
AU - Laher, Russ
AU - Surace, Jason
AU - Drake, Andrew J.
AU - Djorgovski, Stanislav G.
AU - Mahabal, Ashish A.
AU - Graham, Matthew J.
AU - Donalek, Ciro
N1 - Publisher Copyright:
© 2017, The Astronomical Society of the Pacific. All rights reserved.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - 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.
AB - 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.
KW - (stars:) novae-cataclysmic variables
KW - Close-surveys-catalogs-methods
KW - Data analysis-methods
KW - Observational
KW - Stars: binaries (including multiple)
UR - http://www.scopus.com/inward/record.url?scp=85028336176&partnerID=8YFLogxK
U2 - 10.1088/1538-3873/aa7a99
DO - 10.1088/1538-3873/aa7a99
M3 - 期刊論文
AN - SCOPUS:85028336176
SN - 0004-6280
VL - 129
JO - Publications of the Astronomical Society of the Pacific
JF - Publications of the Astronomical Society of the Pacific
IS - 979
M1 - 094202
ER -