Light curves of SDSS J100658.40+233724.4

DOI

We present time-resolved spectroscopy and photometry of SDSS J100658.40+233724.4, which we have discovered to be an eclipsing cataclysmic variable with an orbital period of 0.18591324 days (267.71507min). The observed velocity amplitude of the secondary star is 276+/-7km/s, which an irradiation correction reduces to 258+/-12km/s. Doppler tomography of emission lines from the infrared calcium triplet supports this measurement. We have modelled the light curve using the LCURVE code and Markov Chain Monte Carlo simulations, finding a mass ratio of 0.51+/-0.08. From the velocity amplitude and the light curve analysis we find the mass of the white dwarf to be 0.78+/-0.12M_{sun} and the masses and radii of the secondary star to be 0.40+/-0.10M{sun} and 0.466+/-0.036R{sun}_, respectively. The secondary component is less dense than a normal main sequence star but its properties are in good agreement with the expected values for a CV of this orbital period. By modelling the spectral energy distribution of the system we find a distance of 676+/-40pc and estimate a white dwarf effective temperature of 16500+/-2000K.

Identifier
DOI http://doi.org/10.26093/cds/vizier.35070929
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/507/929
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/507/929
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/507/929
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/507/929
Provenance
Creator Southworth J.; Hickman R.D.G.; Marsh T.R.; Rebassa-Mansergas A.,Gansicke B.T.; Copperwheat C.M.; Rodriguez-Gil P.
Publisher CDS
Publication Year 2010
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy