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The 2015 superoutburst of QZVirginis: Detection of growing superhumps between the precursor and main superoutburst.
- Source :
- Publications of the Astronomical Society of Japan; Aug2017, Vol. 69 Issue 4, p1-10, 10p
- Publication Year :
- 2017
-
Abstract
- We report on time-resolved photometry of the 2015 February-March superoutburst of QZVirginis. The superoutburst consisted of a separated precursor, main superoutburst, and rebrightening. We detected superhumps with a period of 0.061181(42) d between the precursor and main superoutburst. Based on analyses of period changes and amplitudes of superhumps, the observed superhumps were identified as growing superhumps (stage A superhumps). The duration of the stage A superhumps was about 5 d, unusually long for SUUMa-type dwarf novae. Using the obtained stage A superhump period, we estimated the mass ratio of QZ Vir to be 0.108(3). This value suggests that QZ Vir is an SUUMa-type dwarf nova evolving toward the period minimum. Based on the present and previous observations regarding long-lasting stage A superhumps, the time scale for stage A superhumps is likely to be determined by the mass ratio of the system and the temperature of the accretion disk. [ABSTRACT FROM AUTHOR]
- Subjects :
- STELLAR photometry
METEOR showers
DWARF novae
ACCRETION disks
TEMPERATURE
Subjects
Details
- Language :
- English
- ISSN :
- 00046264
- Volume :
- 69
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Publications of the Astronomical Society of Japan
- Publication Type :
- Academic Journal
- Accession number :
- 124636920
- Full Text :
- https://doi.org/10.1093/pasj/psx055