2002A&A...394..231H


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET21:12:51

2002A&A...394..231H - Astronomy and Astrophysics, volume 394, 231-239 (2002/10-4)

VY Sculptoris stars as magnetic cataclysmic variables.

HAMEURY J.-M. and LASOTA J.-P.

Abstract (from CDS):

We show that the absence of outbursts during low states of VY Scl stars is easily explained if white dwarfs in these systems are weakly magnetized (µ>5x1030G.cm3). However, some of the VY Scl stars are observed to have very slow declines to minimum and similarly slow rises to maximum. The absence of outbursts during such intermediate (as opposed to low) states, which last much longer than typical disc viscous times, can be explained only if accretion discs are absent when their temperatures would correspond to an unstable state. This requires magnetic fields stronger than those explaining outburst absence during low states, since white dwarfs in this sub-class of VY Scl stars should have magnetic moments µ>1.5x1033G.cm3 i.e. similar to those of Intermediate Polars. Since at maximum brightness several VY Scl stars are SW Sex stars, this conclusion is in agreement with recent claims about the magnetic nature of these systems.

Abstract Copyright:

Journal keyword(s): accretion, accretion discs - instabilities - stars: novae, cataclysmic variables - stars: binaries: close

Simbad objects: 22

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Number of rows : 22

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* PX And CV* 00 30 05.8083590217 +26 17 26.438854924   15.38 14.88 14.69   ~ 99 0
2 V* RX And DN* 01 04 35.5373041151 +41 17 57.783687786   11.99 12.43     ~ 302 0
3 V* RW Tri NL* 02 25 36.1555561414 +28 05 50.893091344   13.50 12.50     M0V 289 0
4 V* TV Col No* 05 29 25.5292527066 -32 49 03.900974253     13.60     K1 309 0
5 V* KR Aur No* 06 15 43.9180386147 +28 35 08.574183087           ~ 149 0
6 PG 0818+513 CV* 08 22 36.0477126559 +51 05 24.558776170   15.73       ~ 98 0
7 V* SW Sex NL* 10 15 09.3650789592 -03 08 32.962346997           ~ 182 0
8 V* DW UMa CV* 10 33 52.8751166936 +58 46 54.719916520   14.33   14.33 14.35 ~ 216 0
9 V* UX UMa NL* 13 36 40.9533414077 +51 54 49.424110262   12.78 13.26     Oev: 503 0
10 V* LX Ser NL* 15 38 00.0940371086 +18 52 03.246645222     15.06     G8V 133 0
11 V* V795 Her No* 17 12 56.1686428004 +33 31 19.239210099   12.53 12.64 12.69   ~ 167 0
12 V* V442 Oph No* 17 32 15.1362979610 -16 15 22.067845629   12.60       ~ 80 0
13 V* AM Her AM* 18 16 13.2546541781 +49 52 04.759861155     12.30     M4.5 915 0
14 V* V1223 Sgr DQ* 18 55 02.3109253503 -31 09 49.589704079           ~ 305 0
15 V* MV Lyr No* 19 07 16.2886975947 +44 01 07.867270712   12.18 12.843   12.578 M5Ve 252 0
16 V* V794 Aql No* 20 17 33.9157230491 -03 39 50.961851201           ~ 84 0
17 V* AE Aqr DQ* 20 40 09.1598509019 -00 52 15.057042857   12.46 10.40   10.191 K3-5IV/V 618 0
18 EM* LkHA 170 Ae* 20 52 12.7784292502 +44 19 26.087626178           A0e 104 0
19 V* LS Peg DN* 21 51 57.9372002301 +14 06 53.267732979   11.89 12.10 12.18   ~ 82 0
20 V* FO Aqr DQ* 22 17 55.3796324299 -08 21 03.755362145           ~ 328 0
21 V* AO Psc DQ* 22 55 17.9860142780 -03 10 39.982033015           ~ 290 0
22 V* V425 Cas No* 23 03 46.6580438884 +53 17 14.863094817           ~ 43 0

    Equat.    Gal    SGal    Ecl

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