2008A&A...486..505Z


Query : 2008A&A...486..505Z

2008A&A...486..505Z - Astronomy and Astrophysics, volume 486, 505-509 (2008/8-1)

Cyclic brightening in the short-period WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2.

ZHARIKOV S.V., TOVMASSIAN G.H., NEUSTROEV V.V., MICHEL R., ZURITA C., ECHEVARRIA J., BIKMAEV I.F., PAVLENKO E.P., JEON Y.-B., VALYAVIN G.G. and AVILES A.

Abstract (from CDS):

We observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 to study the origin of long-term variability found in its light curve. Multi-longitude, time-resolved, photometric observations were acquired to analyze this uncommon behavior, which has been found in two newly discovered CVs. This study of SDSS J080434.20+510349.2 concerns primarily the understanding of the nature of the observed, double-humped, light curve and its relation to a cyclic brightening that occurs during quiescence. The observations were obtained early in 2007, when the object was at about V∼17.1, about 0.4mag brighter than the pre-outburst magnitude. The light curve shows a sinusoidal variability with an amplitude of about 0.07mag and a periodicity of 42.48min, which is half of the orbital period of the system. We observed in addition two ``mini-outbursts'' of the system of up to 0.6mag, which have a duration of about 4-days each. The ``mini-outburst'' has a symmetric profile and is repeated in approximately every 32-days. Subsequent monitoring of the system shows a cyclical behavior of such ``mini-outbursts'' with a similar recurrence period. The origin of the double-humped light curve and the periodic brightening is discussed in the light of the evolutionary state of SDSS J080434.20+510349.2.

Abstract Copyright:

Journal keyword(s): stars: dwarf novae - stars: novae, cataclysmic variables - methods: observational - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/486/505): lc.dat lc.fits>

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* EZ Lyn CV* 08 04 34.2185575584 +51 03 49.366034352       17.4   ~ 60 0
2 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 169 0
3 V* AL Com CV* 12 32 25.7951754648 +14 20 42.292188276     16.2     ~ 240 0
4 V* V406 Vir CV* 12 38 13.7337832872 -03 39 32.965818228           DA3e 42 0
5 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20     DAepv 914 0

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2022.05.28-22:27:21

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