Spectroscopic Orbital Periods for 29 Cataclysmic Variables from the Sloan Digital Sky Survey

Abstract

We report follow-up spectroscopy of 29 cataclysmic variables from the Sloan Digital Sky Survey (SDSS), 22 of which were discovered by SDSS and seven other previously known systems that were recovered in SDSS. The periods for 16 of these objects were included in the tabulation by Gaensicke et al. (2009). While most of the systems have periods less than 2 hours, only one has a period in the 80-86 minute 'spike' found by Gaensicke et al. (2009), and 11 have periods longer than 3 hours, indicating that the present sample is skewed toward longer-period, higher-luminosity objects. Seven of the objects have spectra resembling dwarf novae, but have apparently never been observed in outburst, suggesting that many cataclysmics with relatively low variability amplitude remain to be discovered. Some of the objects are notable. SDSS J07568+0858 and SDSS J08129+1911 were previously known to have deep eclipses; in addition to spectroscopy, we use archival data from the CRTTS to refine their periods. We give a parallax-based distance of 195 (+54, -39) pc for LV Cnc (SDSS J09197+0857), which at Porb = 81 m has the shortest orbital period in our sample. SDSS J08091+3814 shows both the spectroscopic phase offset and phase-dependent absorption found in SW Sextantis stars. The average spectra of SDSS J08055+0720 and SDSS J16191+1351 show contributions from K-type secondaries, and SDSS J080440+0239 shows a contribution from an early M star. We use these to constrain the distances. SDSS J09459+2922 has characteristics typical of a magnetic system. SDSS11324+6249 may be a novalike variable, and if so, its orbital period (99 min) is unusually short for that subclass.

arXiv commentAccepted for Astronomical Journal. 43 pages, 10 figures

References in corpus (40)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The USNO-B Catalog
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• First Results from the Catalina Real-time Transient Survey
• RVSAO 2.0: Digital Redshifts and Radial Velocities
• The Donor Stars of Cataclysmic Variables
• Low-Mass Dwarf Template Spectra from the Sloan Digital Sky Survey
• A Catalog and Atlas of Cataclysmic Variables - The Living Edition
• SDSS unveils a population of intrinsically faint cataclysmic variables at the minimum orbital period
• Cataclysmic Variables from SDSS II. The Second Year
• Cataclysmic Variables from SDSS I. The First Results
• The 2001 Superoutburst of WZ Sagittae
• Parallax and Distance Estimates for Fourteen Cataclysmic Variable Stars
• 1RXS J232953.9+062814: A Dwarf Nova with a 64-minute Orbital Period and a Conspicuous Secondary Star
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II: The Second Year (2009-2010)
• Cataclysmic Variables from SDSS. VIII. The Final Year (2007-2008)
• On the late spectral types of cataclysmic variable secondaries
• SW Sextantis stars: the dominant population of CVs with orbital periods between 3-4 hours
• High speed photometry of faint Cataclysmic Variables: IV. V356 Aql, Aqr1, FIRST J1023+0038, Ha 0242-2802, GI Mon, AO Oct, V972 Oph, SDSS 0155+00, SDSS 0233+00, SDSS 1240-01, SDSS 1556-00, SDSS 2050-05, FH Ser
• Cataclysmic Variables from SDSS VII. The Seventh Year (2006)
• One thousand cataclysmic variables from the Catalina Real-time Transient Survey
• The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae
• The Dwarf Novae of Shortest Period
• SDSS J150722.30+523039.8: a CV formed directly from a detached white dwarf/brown dwarf binary?
• Orbital periods of cataclysmic variables identified by the SDSS. III. Time-series photometry obtained during the 2004/5 International Time Project on La Palma
• Data Mining for Dwarf Novae in SDSS, GALEX and Astrometric Catalogues
• SDSS 1507+02: A Halo Cataclysmic Variable?
• High speed photometry of faint Cataclysmic Variables - VII. Targets selected from the Sloan Digital Sky Survey and the Catalina Real-time Transient Survey
• Parallax and Distance Estimates for Twelve Cataclysmic Variable Stars
• Spectroscopy and Photometry of Cataclysmic Variable Candidates from the Catalina Real Time Survey
• Dwarf novae in the Hamburg Quasar Survey: Rarer than expected
• Orbital periods of cataclysmic variables identified by the SDSS. II. Measurements for six objects, including two eclipsing systems
• Discovery of two new accreting pulsating white dwarf stars
• The minimum period problem in cataclysmic variables
• Photometric Selection of QSO Candidates From GALEX Sources
• Orbital periods of cataclysmic variables identified by the SDSS. V. VLT, NTT and Magellan observations of nine equatorial systems
• On the SW Sex-Type Eclipsing Cataclysmic Variable SDSS0756+0858
• An Illustration of Modeling Cataclysmic Variables: HST, FUSE, SDSS Spectra of SDSSJ080908.39+381406.2
• Optical polarimetry and infrared photometry of two AM Her binaries: 1RXS J161008.0+035222 and 1RXS J231603.9-052713
• CCD Photometry of a Newly Confirmed SU UMa-Type Dwarf Nova, NSV 4838

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• A 9-Hr CV With One Outburst in 4 Years of Kepler Data
• New evidence for the precession of tilted disk in SDSS J081256.85+191157.8
• Spectroscopic Studies of 30 Short-period Cataclysmic Variable Stars, and Remarks on the Evolution and Population of Similar Objects
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