2017A&A...606A..45D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST05:52:32

2017A&A...606A..45D - Astronomy and Astrophysics, volume 606A, 45-45 (2017/10-1)

Quiescent photometric modulations of two low-inclination cataclysmic variables KZ Geminorum and TW Virginis.

DAI Z., SZKODY P., TAANI A., GARNAVICH P.M. and KENNEDY M.

Abstract (from CDS):

Aims. The quiescent periodic photometric modulations of two low-inclination cataclysmic variables observed in Kepler K2 Campaigns 0 and 1, KZ Gem and TW Vir, are investigated.
Methods. A phase-correcting method was successfully used to detect the orbital modulations of KZ Gem and TW Vir and improve their orbital periods. The light curve morphologies of both CVs were further analyzed by defining flux ratios and creating colormaps.
Results. KZ Gem shows ellipsoidal modulations with an orbital period of 0.22242(1) day, twice the period listed in the updated RK catalogue (Edition 7.24). With this newly determined period, KZ Gem is no longer a CV in the period gap, but a long-period CV. A part of the quiescent light curve of TW Vir that had the highest stability was used to deduce its improved orbital period of 0.182682(3) day. The flat patterns shown in the colormaps of the flux ratios for KZ Gem demonstrate the stability of their orbital modulations, while TW Vir show variable orbital modulations during the K2 datasets. In TW Vir, the single versus double-peaked nature of the quiescent orbital variations before and after superoutburst may be related to the effect of the superoutburst on the accretion disk.

Abstract Copyright: © ESO, 2017

Journal keyword(s): binaries close - novae, cataclysmic variables - stars: individual: KZ Gem - stars: individual: TW Vir - stars: individual: TW Vir

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 1A 0620-00 HXB 06 22 44.5420315454 -00 20 44.289428950 10.60 11.40 11.2     K3V-K7V 1040 0
2 UCAC3 232-65219 CV* 06 32 13.1150519827 +25 36 22.893634415   15.86 15.22 14.97   ~ 6 0
3 V* UV Gem DN* 06 38 44.0 +18 16 12           ~ 30 0
4 V* KZ Gem DN* 06 53 02.7465565509 +16 39 49.897905665           ~ 12 2
5 V* TT Crt DN* 11 34 47.1766985214 -11 45 30.370184613   12.5       ~ 46 0
6 V* RZ Leo DN* 11 37 22.2523056583 +01 48 58.617841432     19.6     DA+dM2 146 0
7 V* QZ Vir DN* 11 38 26.8240425768 +03 22 07.110214355     15.81     ~ 240 1
8 V* TW Vir DN* 11 45 21.1712747240 -04 26 05.778821560   17.38   15.03   M2 134 0
9 LBQS 1144+0111 WD* 11 46 33.9379501686 +00 55 10.273391361           DA+Me 10 1
10 V* V1239 Her CV* 17 02 13.2466307450 +32 29 54.158773442           M1.5e 37 0
11 V* FO Aqr DQ* 22 17 55.3796324299 -08 21 03.755362145           ~ 323 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-05:52:32

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