期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 441, 期 2, 页码 1186-1200出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu639
关键词
stars: distances; stars: dwarf novae; novae, cataclysmic variables; galaxies: stellar content
资金
- U.S. National Science Foundation [AST-0909182, CNS-0540369]
- NASA [08-FERMI08-0025]
- Ajax Foundation
- National Aeronautics and Space Administration through the Science Mission Directorate NEOs Observations Program [NNG05GF22G]
- NASA through Hubble Fellowship [HF-51261.01-A]
- STScI [NAS 5-26555]
- Ministry for the Economy, Development
- Tourism's Programa Iniciativa Cientifica Milenio [P07-021-F]
- Proyecto FONDECYT [1110326]
- Alfred P. Sloan Foundation
- Participating Institutions
- National Science Foundation
- U.S. Department of Energy Office of Science
- National Aeronautics and Space Administration
- European Research Council under the European Union [320964]
- UK's Science and Technology Facilities Council [ST/I001719/1]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1313422] Funding Source: National Science Foundation
We present 855 cataclysmic variable candidates detected by the Catalina Real-time Transient Survey (CRTS) of which at least 137 have been spectroscopically confirmed and 705 are new discoveries. The sources were identified from the analysis of five years of data, and come from an area covering three quarters of the sky. We study the amplitude distribution of the dwarf novae cataclysmic variables (CVs) discovered by CRTS during outburst, and find that in quiescence they are typically 2 mag fainter compared to the spectroscopic CV sample identified by the Sloan Digital Sky Survey. However, almost all CRTS CVs in the SDSS footprint have ugriz photometry. We analyse the spatial distribution of the CVs and find evidence that many of the systems lie at scale heights beyond those expected for a Galactic thin disc population. We compare the outburst rates of newly discovered CRTS CVs with the previously known CV population, and find no evidence for a difference between them. However, we find significant evidence for a systematic difference in orbital period distribution. We discuss the CVs found below the orbital period minimum and argue that many more are yet to be identified among the full CRTS CV sample. We cross-match the CVs with archival X-ray catalogues and find that most of the systems are dwarf novae rather than magnetic CVs.
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