2010A&A...510A.100S


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET22:09:47

2010A&A...510A.100S - Astronomy and Astrophysics, volume 510, A100-100 (2010/2-1)

Orbital periods of cataclysmic variables identified by the SDSS. VII. Four new eclipsing systems.

SOUTHWORTH J., COPPERWHEAT C.M., GAENSICKE B.T. and PYRZAS S.

Abstract (from CDS):

We present photometry of nine cataclysmic variable stars identified by the Sloan Digital Sky Survey, aimed at measuring the orbital periods of these systems. Four of these objects show deep eclipses, from which we measure their orbital periods. The light curves of three of the eclipsing systems are also analysed using the lcurve code, and their mass ratios and orbital inclinations determined. SDSS J075059.97+141150.1 has an orbital period of 134.1564±0.0008min, making it a useful object with which to investigate the evolutionary processes of cataclysmic variables. SDSS J092444.48+080150.9 has a period of 131.2432±0.0014min and is probably magnetic. The white dwarf ingress and egress phases are very deep and short, and there is no clear evidence that this object has an accretion disc. SDSS J115207.00+404947.8 and SDSS J152419.33+220920.1 are nearly identical twins, with periods of 97.5±0.4 and 93.6±0.5min and mass ratios of 0.14±0.03 and 0.17±0.03, respectively. Their eclipses have well-defined white dwarf and bright spot ingress and egress features, making them excellent candidates for detailed study. All four of the orbital periods presented here are shorter than the 2-3h period gap observed in the known population of cataclysmic variables.

Abstract Copyright:

Journal keyword(s): dwarf novae - novae, cataclysmic variables - binaries: eclipsing - binaries: spectroscopic - white dwarfs

VizieR on-line data: <Available at CDS (J/A+A/510/A100): stars.dat j0310b.dat j0743b.dat j0746b.dat j0750b.dat j0750v.dat j0758b.dat j0906b.dat j0906r.dat j0906g.dat j0924b.dat j0924v.dat j1152v.dat j1524v.dat>

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* KY Eri DN* 03 10 51.666 -07 55 00.29           ~ 13 0
2 SDSS J074355.56+183834.8 CV* 07 43 55.56 +18 38 34.8   20.18 19.65     ~ 3 0
3 CRTS J074640.6+173412 CV* 07 46 40.6201925625 +17 34 12.804051705           ~ 11 0
4 CRTS J075100.0+141150 CV* 07 50 59.9740529566 +14 11 50.230528780           ~ 9 0
5 2MASS J07580882+1043453 EB* 07 58 08.8169680617 +10 43 45.556044892     17.20     ~ 6 0
6 SDSS J090628.24+052656.9 CV* 09 06 28.17 +05 26 57.8           sdB+G 10 0
7 V* HU Leo CV* 09 24 44.4786024744 +08 01 51.005758948           M0 15 0
8 SDSS J103533.02+055158.4 CV* 10 35 33.0223106272 +05 51 58.347085513   18.57 18.80     DA 45 0
9 SDSS J115207.00+404947.9 RR? 11 52 07.0055314990 +40 49 47.905014344           ~ 16 0
10 CRTS CSS090329 J152419+220920 DN* 15 24 19.3417207114 +22 09 20.052660557     19.32     ~ 15 0
11 V* QZ Ser DN* 15 56 54.4739950450 +21 07 19.082928416           ?+K4Ve 39 0

    Equat.    Gal    SGal    Ecl

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2020.11.28-22:09:47

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