2004A&A...423L...1V


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.30CEST13:29:10

2004A&A...423L...1V - Astronomy and Astrophysics, volume 423, L1-4 (2004/8-3)

η Carinae: The 1998 brightening and the smearing-out effect.

VAN GENDEREN A.M. and STERKEN C.

Abstract (from CDS):

A comparison of broad-band photometry of the Homunculus (ground-based data) and of broad-band and narrow-band photometry of the central region (HST-based) from 1997 to 2003 reveals that, apart from the brightening in 1998, the Homunculus as well as the central star varied in a very similar way. This excludes smearing-out effects as an explanation for the difference between the brightening of the central region and that of the Homunculus during 1998. A plausible reason for the homologous light behaviour is enhanced extinction decrease in the line-of-sight to the central region during a global brightening occurring after the 1998.0 spectroscopic event. From 1998 to 2004 there is indeed a brightness excess of ∼0.3mag between the Homunculus and the extrapolated secular brightening. We also illustrate that ground-based aperture photometry of the Homunculus is a reliable diagnostic tool for studying the variability of the central star.

Abstract Copyright:

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

Status at CDS:  

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 319 1
2 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2178 0

    Equat.    Gal    SGal    Ecl

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2020.03.30-13:29:10

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