A RING NEBULA SURROUNDING EVOLVED MASSIVE STARS IN THE POST-STARBURSTGALAXY NGC-1569

Authors
DRISSEN L ROY JR
Citation
L. Drissen et Jr. Roy, A RING NEBULA SURROUNDING EVOLVED MASSIVE STARS IN THE POST-STARBURSTGALAXY NGC-1569, Publications of the Astronomical Society of the Pacific, 106(703), 1994, pp. 974-977
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
106
Issue
703
Year of publication
1994
Pages
974 - 977
Database
ISI
SICI code
0004-6280(1994)106:703<974:ARNSEM>2.0.ZU;2-4
Abstract
Broad stellar emission lines have been detected in the optical spectru m of a small cluster in the post-starburst galaxy NGC 1569. These line s, He I 5876, Ha, and He I 6678, have a full width at half maximum of 600 km s(-1), and are attributed to a late-type WN star. The cluster, located in the outskirts of the galaxy, is surrounded by a large (radi us=30 pc) ring nebula. This detection of a Wolf-Rayet star is a direct evidence of recent (less than or equal to 5 Myrs) massive (M(i) great er than or equal to 40M.) star formation in NGC 1569.