2010MNRAS.407.1819R


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.23CEST04:04:32

2010MNRAS.407.1819R - Mon. Not. R. Astron. Soc., 407, 1819-1825 (2010/September-3)

Multiwavelength observations of the helium dwarf nova KL Dra through its outburst cycle.

RAMSAY G., KOTKO I., BARCLAY T., COPPERWHEAT C.M., ROSEN S., JEFFERY C.S., MARSH T.R., STEEGHS D. and WHEATLEY P.J.

Abstract (from CDS):

We present multiwavelength observations of the helium-dominated accreting binary KL Dra which has an orbital period of 25 min. Our ground-based optical monitoring programme using the Liverpool Telescope has revealed KL Dra to show frequent outbursts. Although our coverage is not uniform, our observations are consistent with the outbursts recurring on a time-scale of ∼60 d. Observations made using Swift show that the outbursts occur with a similar amplitude and duration (2 weeks) at both UV and optical energies. Although KL Dra is a weak X-ray source, we find no significant evidence that the X-ray flux varies over the course of an outburst cycle. We can reproduce the main features of the 60-d outburst cycle using the disc instability model and a helium-dominated accretion flow. Although the outbursts of KL Dra are very similar to those of the hydrogen-accreting dwarf novae, we cannot exclude the fact that they are the AM CVn equivalent of WZ Sge-type outbursts. With outbursts occurring every ∼2 months, KL Dra is an excellent target to study helium-dominated accretion flows in general.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

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

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* U Gem CV* 07 55 05.2323858391 +22 00 05.045435077   15.3 14.54     DA 1056 0
2 G 61-29 CV* 13 05 42.4008232413 +18 01 03.765282516   15.59   15.9   DBe 244 0
3 V* V803 Cen CV* 13 23 44.5334901172 -41 44 29.260966080   16.8 14.42     ~ 140 0
4 V* CR Boo CV* 13 48 55.1859261603 +07 57 35.927051968     15.00     ~ 168 0
5 V* GW Lib CV* 15 19 55.3336459070 -25 00 24.613958659   9.0       ~ 183 0
6 V* KL Dra CV* 19 24 38.2451670877 +59 41 46.722317032   16.8       DB+ 53 1
7 V* WZ Sge CV* 20 07 36.5036203067 +17 42 14.733657651   15.30 15.20     DAepv 901 0
8 V* SS Cyg CV* 21 42 42.8034554117 +43 35 09.863763484 11.07 8.2 7.70     K5V 1230 1

    Equat.    Gal    SGal    Ecl

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2021.06.23-04:04:32

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