Bibcode
Zharikov, S. V.; Tovmassian, G. H.; Neustroev, V. V.; Michel, R.; Zurita, C.; Echevarría, J.; Bikmaev, I. F.; Pavlenko, E. P.; Jeon, Y.-B.; Valyavin, G. G.; Aviles, A.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 486, Issue 2, 2008, pp.505-509
Fecha de publicación:
8
2008
Revista
Número de citas
32
Número de citas referidas
25
Descripción
Aims: 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. Methods: Multi-longitude, time-resolved,
photometric observations were acquired to analyze this uncommon
behavior, which has been found in two newly discovered CVs. Results: 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 0.4 mag brighter than the pre-outburst
magnitude. The light curve shows a sinusoidal variability with an
amplitude of about 0.07 mag and a periodicity of 42.48 min, which is
half of the orbital period of the system. We observed in addition two
“mini-outbursts” of the system of up to 0.6 mag, 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.
Table [see full textsee full textsee full text] and Fig. [see full
textsee full textsee full text] are only available in electronic form at
http://www.aanda.org Individual photometric measurements are only
available in electronic form at the CDS via anonymous ftp to
cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/486/505