2003A&A...405.1057V


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.18CEST10:04:48

2003A&A...405.1057V - Astronomy and Astrophysics, volume 405, 1057-1062 (2003/7-3)

η Carinae: The optical flare-like events during low-excitation passages.

VAN GENDEREN A.M., STERKEN C. and ALLEN W.H.

Abstract (from CDS):

The 1992.5 and 1998.0 low-excitation events of the possible binary in the core of η Carinae show a conspicuous flare-like event in optical and near-ultraviolet light. These events last a couple of months and have a light amplitude of 0.1-0.2mag in V. Considering the presence of a dense (bi-polar) stellar wind, one explanation could be that some type of a hot area is created by an increased mass flow from the S Dor primary near the hypothetical periastron. These flare-like events are terminated by sharp dips. The magnitude differences between the underlying light source and the central light (``Component A'') are derived. It turns out that they are fainter than Component A by ∼2.5mag. The luminosity could be of the order of 105L. It was possible to derive two new continuum values in the near-UV, reinforcing the impression derived from the HST fluxes that Component A has a very strong radiation peak in the Balmer continuum. This can probably be explained by the strong emission of the stellar wind.

Abstract Copyright:

Journal keyword(s): technique: photometric - stars: individual: η Carinae - stars: variables: general - stars: supergiants

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * q Car LP* 10 17 04.9753050 -61 19 56.288301   4.899 3.350     K2.5II 122 0
2 * p Car Be* 10 32 01.4629679 -61 41 07.196308 2.46 3.18 3.27 3.22 3.28 B4Vne 217 0
3 * w Car LP? 10 43 32.2901493 -60 33 59.830760   6.219 4.545     K4III 41 0
4 * eta Car Em* 10 45 03.5362075818 -59 41 04.053436648 6.37 6.82 6.21 4.90 4.41 OBepec 2143 0

    Equat.    Gal    SGal    Ecl

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2019.09.18-10:04:48

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