2002A&A...382..910S


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET21:46:43

2002A&A...382..910S - Astronomy and Astrophysics, volume 382, 910-920 (2002/2-2)

Dramatic change of the recurrence time and outburst parameters of the intermediate polar GK Persei.

SIMON V.

Abstract (from CDS):

This analysis has shown that the intermediate polar GK Per experienced a very striking evolution. Its outbursts became wider and brighter in the last five decades. These changes were accompanied by striking variations of the recurrence time TC, from 385 days within the years 1948-1967 to 890 days in 1970. Nowadays, TC displays a strong trend of linear increase. Decrease of irradiation of the disk by the WD, combined with the decrease of viscosity, offers a plausible explanation. It is argued that variations of the mass transfer rate are unlikely to play a major role. The morphology of the outburst light curves in the optical and the X-ray region is also studied. The decay branch in the optical remains remarkably similar for all the events while the largest changes of the light curve occur in the rising branch. This can be explained if the thermal instability may start at different distances from the disk center. The quiescent level of brightness does not display any secular trend in recent decades but a wave on the time scale of about 30 years with the full amplitude of 0.3mv, probably due to activity of the cool star, is detected.

Abstract Copyright:

Journal keyword(s): stars: activity - binaries: close - binaries: general - stars: magnetic fields - novae, cataclysmic variables - stars: individual: GK Per

CDS comments: in ref list BIANCHINI A., SABBADIN F., FAVERO G.C., DALMERI I. 1986A&A. ..160..367B instead of A&A.367.373, KING 1979MNRAS.187p..77K inste ad of MNRAS.187.77

Simbad objects: 9

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Number of rows : 9

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* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 871 0
2 V* SW UMa CV* 08 36 42.7494852536 +53 28 37.976353343           ~ 292 0
3 V* CH UMa DN* 10 07 00.7219578828 +67 32 47.507173639   15.97       ~ 106 0
4 V* DO Dra DN* 11 43 38.4924789768 +71 41 20.559348288       13.747   DQ 197 1
5 V* V1017 Sgr No* 18 32 04.4737964965 -29 23 12.593546512           G5IIIp 126 0
6 V* V446 Her No* 18 57 21.5917264330 +13 14 29.319279140           ~ 133 0
7 V* WZ Sge DN* 20 07 36.5036203067 +17 42 14.733657651   15.30 15.20     DAepv 895 0
8 V* SS Cyg DN* 21 42 42.8034554117 +43 35 09.863763484 11.07 8.2 7.70     K5V 1218 1
9 V* DX And DN* 23 29 46.6839033611 +43 45 04.034386165   11.00       ~ 89 0

    Equat.    Gal    SGal    Ecl

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2020.11.28-21:46:43

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