OBSERVATIONS OF THE BRIGHT-RIMMED MOLECULAR CLOUDS NEAR THE CEPHEUS OB2 ASSOCIATION

Citation
C. Indrani et Tk. Sridharan, OBSERVATIONS OF THE BRIGHT-RIMMED MOLECULAR CLOUDS NEAR THE CEPHEUS OB2 ASSOCIATION, Journal of astrophysics and astronomy, 15(2), 1994, pp. 157-163
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
0250-6335
Volume
15
Issue
2
Year of publication
1994
Pages
157 - 163
Database
ISI
SICI code
0250-6335(1994)15:2<157:OOTBMC>2.0.ZU;2-H
Abstract
Massive stars have significant influence on the evolution of the inter stellar medium. Bright rims, cometary morphology of clouds, as well as their motion are some examples of the influence of massive stars on n earby molecular clouds. The cometary clouds in the Gum-Vela region are very good examples. In an attempt to understand the kinematics of the clouds in such regions we have carried out CO line observations towar ds bright-rimmed clouds near the OB Association Cep OB2. The radial ve locities of the clouds are consistent with an expansion of the system at almost-equal-to 4 kms-1 away from the dominant O6.5V star in the as sociation, HD206267. We find the rocket mechanism to be the most likel y cause for expansion as found for both the Gum-Vela and the Rosette g lobules. We conclude that such expanding motions are quite common in r egions near massive stars and make a brief comparison of the Cepheus s ystem with the Gum-Vela system.