SIMBAD references

2000PASP..112..625P - Publ. Astron. Soc. Pac., 112, 625-631 (2000/May-0)

V803 Centauri: a helium-rich dwarf nova.

PATTERSON J., WALKER S., KEMP J., O'DONOGHUE D., BOS M. and STUBBINGS R.

Abstract (from CDS):

We report 1992-1999 photometry of the helium-rich cataclysmic variable V803 Centauri. In its high brightness state at V=13, the star shows a strong periodic signal with P=1618 s; this resembles the superhumps associated with many dwarf novae. However, it is unusual because the superhump appears to endure through all brightness states, including the very faint state at V=17. The star also becomes occasionally stuck in a ``cycling state'', in which the brightness varies in the range 13.4-14.5, with a period of 22±1 hr. This appears to be the recurrence pattern of ``normal'' dwarf nova outbursts. Thus the underlying physics is probably that of a dwarf nova, but with an accretion disk dominated by helium. Reckoned as a dwarf nova, V803 Cen presents an interesting test for accretion disk theory, because it appears to display two timescales for eruption recurrence: 0.94 day at V=14.5 and ∼5 days at V=17.2. This is roughly consistent with the general idea that recurrence time scales inversely with accretion rate.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Stars: Novae, Cataclysmic Variables - Stars: Individual: Constellation Name: V803 Centauri

Simbad objects: 6

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2021.06.25-03:11:01

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