Post-eruption detection of variable 12 in NGC 2403 (SN 1954j): Another etacarinae variable

Citation
N. Smith et al., Post-eruption detection of variable 12 in NGC 2403 (SN 1954j): Another etacarinae variable, PUB AST S P, 113(784), 2001, pp. 692-696
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
ISSN journal
0004-6280 → ACNP
Volume
113
Issue
784
Year of publication
2001
Pages
692 - 696
Database
ISI
SICI code
0004-6280(200106)113:784<692:PDOV1I>2.0.ZU;2-D
Abstract
We have obtained optical and near-infrared imaging photometry of the irregu lar variable V12 in NGC 2403 (SN 1954j), roughly 50 years after its giant e ruption. The observations confirm that the star survived the event and that it was therefore not a peculiar supernova but instead was an eta Carinae-l ike eruption. Variable 12 is now very faint and red, which could be due to extinction and reddening of a hot star by circumstellar dust that formed in ejecta from the giant eruption in 1954. A clear excess at similar to2 mum probably indicates thermal emission from hot circumstellar dust.