SIMBAD references

2012MNRAS.425.1486R - Mon. Not. R. Astron. Soc., 425, 1486-1491 (2012/September-2)

Suppression of x-rays during an optical outburst of the helium dwarf nova KL Dra.

RAMSAY G., WHEATLEY P.J., ROSEN S., BARCLAY T. and STEEGHS D.

Abstract (from CDS):

KL Dra is a helium-accreting AM CVn binary system with an orbital period close to 25min. Approximately every 60d there is a 4-mag optical outburst lasting ∼ 10d. We present the most sensitive X-ray observations made of an AM CVn system during an outburst cycle. A series of eight observations were made using XMM–Newton which started shortly after the onset of an optical outburst. We find that X-rays are suppressed during the optical outburst. There is some evidence for a spectral evolution of the X-ray spectrum during the course of the outburst. A periodic modulation is seen in the ultraviolet data at three epochs – this is a signature of the binary orbital or the superhump period. The temperature of the X-ray-emitting plasma is cooler compared to dwarf novae, which may suggest that a wind is the origin of a significant fraction of the X-ray flux.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS

Journal keyword(s): accretion, accretion discs - binaries: general - stars: individual: KL Dra - stars: dwarf novae - novae, cataclysmic variables - X-rays: stars

Simbad objects: 6

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2021.05.17-13:10:00

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