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High speed photometry of faint Cataclysmic Variables - VII. Targets selected from the Sloan Digital Sky Survey and the Catalina Real-time Transient Survey | | Patrick A. Woudt
; Brian Warner
; Deanne de Bude
; Sally Macfarlane
; Matthew P. E. Schurch
; Ewald Zietsman
; | | Date: |
3 Jan 2012 | | Abstract: | We present high speed photometric observations of 20 faint cataclysmic
variables, selected from the Sloan Digital Sky Survey and Catalina catalogues.
Measurements are given of 15 new directly measured orbital periods, including
four eclipsing dwarf novae (SDSS0904+03, CSS0826-00, CSS1404-10 and
CSS1626-12), two new polars (CSS0810+00 and CSS1503-22) and two dwarf novae
with superhumps in quiescence (CSS0322+02 and CSS0826-00). Whilst most of the
dwarf novae presented here have periods below 2 h, SDSS0805+07 and SSS0617-36
have relatively long orbital periods of 5.489 and 3.440 h, respectively. The
double humped orbital modulations observed in SSS0221-26, CSS0345-01,
CSS1300+11 and CSS1443-17 are typical of low mass transfer rate dwarf novae.
The white dwarf primary of SDSS0919+08 is confirmed to have non-radial
oscillations and quasi-periodic oscillations were observed in the short-period
dwarf nova CSS1028-08 during outburst. We further report the detection of a new
nova-like variable (SDSS1519+06). The frequency distribution of orbital periods
of CVs in the Catalina survey has a high peak near ~80 min orbital period,
independently confirming that found by Gaensicke et al (2009) from SDSS
sources. We also observe a marked correlation between the median in the orbital
period distribution and the outburst class, in the sense that dwarf novae with
a single observed outburst (over the 5-year baseline of the CRTS coverage)
occur predominantly at shortest orbital period. | | Source: | arXiv, 1201.0671 | | Services: | Forum | Review | PDF | Favorites | |
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