2001A&A...369..882A


Query : 2001A&A...369..882A

2001A&A...369..882A - Astronomy and Astrophysics, volume 369, 882-888 (2001/4-3)

Solar-type cycles of the secondary stars in cataclysmic variables.

AK T., OZKAN M.T. and MATTEI J.A.

Abstract (from CDS):

We found cyclical variations in the quiescent magnitudes and outburst intervals of 21 dwarf novae, 1 nova and 1 nova-like star produced by the solar-type cycles of the late-type secondary components. More than 70% of individual systems in this work are first studied by Fourier periodogram analysis. It seems that the mean cycle amplitudes of the quiescent magnitudes are considerably larger for SU UMa stars. Cyclical modulations of quiescent magnitudes found for the stars, which have orbital periods below the period gap, support the hypothesis that even almost fully convective secondaries may possess activity cycles. The estimated probability density functions show peaks at 9.7, 7.9 and 8.6 yrs for cataclysmic variables (CVs), single main-sequence stars (MS) and all stars (CVs+MS), respectively. Using a larger set of data, we confirm that there is no correlation of the cycle period with the rotational regime of the secondary star. It is also confirmed that cycle periods of CVs are in the range of those of single main-sequence stars. We note that the observational cycle parameters (i.e. cycle period, Pcyc, and cycle amplitude of quiescent magnitudes, Δm) do not seem in relation with any other parameter such as masses of primary and secondary stars, mean outburst interval, mean outburst duration, mean decline and rise rate of outbursts, absolute magnitudes in quiescent and outburst states etc.

Abstract Copyright:

Journal keyword(s): stars: cataclysmic variables - stars: activity

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 V* WW Cet CV* 00 11 24.7726635744 -11 28 43.204518696           ~ 177 0
2 V* GK Per No* 03 31 12.0098863320 +43 54 15.469951212   14.139 13.090 12.589   K1IV 935 0
3 V* TU Men CV* 04 41 40.7061732720 -76 36 45.942303384         14.057 ~ 154 0
4 V* SS Aur CV* 06 13 22.4340408984 +47 44 25.345431780   16.06 15.81     sdBe 261 0
5 V* CZ Ori CV* 06 16 43.2247568736 +15 24 11.297210616   12.81 12.81 16.17   OB- 96 0
6 V* HL CMa CV* 06 45 17.2108297512 -16 51 34.544944080   12.60 12.41     ~ 104 0
7 V* UY Pup CV* 07 46 31.2402238920 -12 57 08.997056712         15.09 K2/6+? 36 0
8 V* BV Pup CV* 07 49 05.2533624216 -23 34 00.396724440           ~ 63 0
9 V* U Gem CV* 07 55 05.2323858391 +22 00 05.045435077   15.3 14.54     DA 1101 0
10 V* Z Cha CV* 08 07 27.7517751528 -76 32 00.665029356           M5.5 605 1
11 V* Z Cam CV* 08 25 13.1986690656 +73 06 39.284964108   12.006 11.927 11.712   ~ 525 0
12 V* SW UMa CV* 08 36 42.7492998204 +53 28 37.976599017           ~ 307 0
13 V* OY Car CV* 10 06 22.0793274312 -70 14 04.584660540           ~ 569 0
14 V* V436 Cen CV* 11 14 00.0568720872 -37 40 47.763655572           ~ 145 0
15 V* V442 Cen CV* 11 24 51.9051069168 -35 54 36.729015624           ~ 53 0
16 V* TT Crt CV* 11 34 47.1765755496 -11 45 30.370189860   16.598 16.029 15.945   ~ 50 0
17 V* EX Hya CV* 12 52 24.2222471899 -29 14 55.999766523   13.51 13.49 13.55   M5-6V 695 0
18 V* EK TrA CV* 15 14 01.3761801610 -65 05 32.305864520           ~ 126 0
19 V* AH Her CV* 16 44 10.0057431264 +25 15 01.942541352   12.44 12.71     K7V 236 0
20 V* FQ Sco CV* 17 08 04.50720 -32 42 02.2428           ~ 26 0
21 V* UZ Ser CV* 18 11 24.8662110657 -14 55 34.506663591           ~ 73 0
22 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20     DAepv 947 0
23 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1291 1

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