VSX J074727.6+065050: a new WZ Sagittae star in Canis minor

Дата и время публикации : 2009-05-01T07:46:35Z

Авторы публикации и институты :
Jeremy Shears
Steve Brady
Greg Bolt
Tut Campbell
Donald F. Collins
Lewis M. Cook
Timothy R. Crawford
Robert Koff
Tom Krajci
Jennie McCormick
Peter Nelson
Joseph Patterson
Pierre de Ponthiere
Mike Potter
Robert Rea
George Roberts
Richard Sabo
Bart Staels
Tonny Vanmunster

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 20 pages, 11 figures. Accepted for publication in the Journal of the British Astronomical Association
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR

Краткий обзор статьи: We present photometry of the first reported superoutburst of the dwarf nova VSX J074727.6+065050 during 2008 January and February. At its brightest the star reached magnitude 11.4 and this was followed by a slow decline at 0.09 mag/d for 19 days, corresponding to the plateau phase. There was then a rapid decline at 1.66 mag/d to a temporary minimum at magnitude 16.6 where it stayed for 2 to 3 days after which there were six remarkable echo outbursts before the star gradually faded back towards quiescence at ~magnitude 19.5. The overall outburst amplitude was at least 8 magnitudes and it lasted more than 80 days. During the plateau phase we observed common superhumps with Psh = 0.06070(6) d, but the period increased to Psh = 0.06151(5) d coinciding with the end of the plateau phase and the onset of the rapid decline. This corresponds to a continuous period change with P^dot = +4.4(9) x 10-5. During the echo outbursts there was a superhump regime with Psh = 0.06088(49) d. Evidence is presented which is consistent with the star being a member of the WZ Sge family of dwarf novae.

Category: Physics