1999A&AS..139...75S


Query : 1999A&AS..139...75S

1999A&AS..139...75S - Astron. Astrophys., Suppl. Ser., 139, 75-88 (1999/October-1)

The peculiar binary V Sagittae: Properties of its long-term light changes.

SIMON V. and MATTEI J.A.

Abstract (from CDS):

Analysis of the AAVSO and AFOEV visual data (more than 6000 one-day means) revealed that V Sge displayed intervals of the suppressed brightness variations (flat segments), interchanging with intervals of the pronounced changes (active segments). The borderlines of the segments are sharp and are just several days long while the length of the segment is several years. The character of the brightness variations in the active segments evolves and depends on the mean level of brightness in the given segment. The low level gives rise to the separated relatively narrow outbursts while the high state/low state transitions occur in segments with higher mean brightness. We discuss the long-term activity in terms of the divergent models for V Sge and conclude that the mass accreting white-dwarf primary and variable mass transfer offer a viable explanation for the photometric activity of V Sge. Our analysis therefore brings an additional support to the model by Williams et al. (1986MNRAS.219..809W) and Patterson et al. (1998PASP..110..380P).

Abstract Copyright:

Journal keyword(s): stars: activity - binaries: close - circumstellar matter - novae, cataclysmic variables - stars: individual: V Sge

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 - 2023
#notes
1 V* QR And CV* 00 19 49.9252996176 +21 56 52.169584416   12.38 12.73 11.86   Ss 128 0
2 SV* HV 5682 XB* 05 13 50.7836696744 -69 51 47.483136927     16.566 16.606 16.62 ~ 312 0
3 2E 1550 XB* 05 43 34.1600044704 -68 22 22.191505716   15.9   17.2 16.54 ~ 317 0
4 OGLE LMC-SC20 113500 EB* 05 46 46.54 -71 08 53.9     19.163   18.886 ~ 250 0
5 V* KR Aur CV* 06 15 43.9189295136 +28 35 08.553579540           ~ 157 0
6 V* V442 Oph CV* 17 32 15.1362474864 -16 15 22.068343152       14.120   ~ 84 0
7 HD 164270 WR* 18 01 43.1453595672 -32 42 55.161329040 8.52 8.97 8.74 9.51   WC9d+? 221 0
8 HD 168206 WR* 18 19 07.3629298440 -11 37 59.164994424 9.65 9.88 9.10     WC8+O8/9III/V 294 1
9 V* V Sge CV* 20 20 14.6911060272 +21 06 10.437106644   11.27 11.22 11.54   Be 209 0

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2022.12.04-10:32:54

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