Premium
V4332 Sgr in ‘Quiescence’
Author(s) -
Kimeswenger S.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200510482
Subject(s) - photometry (optics) , physics , astrophysics , red giant , astronomy , stars
Abstract In 1994 V4332 Sgr underwent a mysterious eruption. Somehow its fast evolution towards a red giant star was, lacking alternative classifications, connected to the red variable M31 RV, which had its eruption in 1988. The red eruptive variable V838 Mon draw the attention back to its ‘older twin’ V4332 Sgr in February 2002. The new precise photometry of the progenitor given here shows that the object started to rise years before the 1994 event. Post‐outburst photometry and spectroscopy from 2002 and 2003 show that the object stopped its decline and seems now to become hotter. The progenitor data and the new high quality spectra provide a supplement and completion to the data around the outburst given by Martini et al. (1999). They thus allow theorists to give new boundaries for modelling this unusual object. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)