High-velocity molecular outflows hear massive young stellar objects

Citation
Yf. Wu et al., High-velocity molecular outflows hear massive young stellar objects, SCI CHINA A, 42(7), 1999, pp. 732-738
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY
ISSN journal
1001-6511 → ACNP
Volume
42
Issue
7
Year of publication
1999
Pages
732 - 738
Database
ISI
SICI code
1001-6511(199907)42:7<732:HMOHMY>2.0.ZU;2-S
Abstract
By mapping the (CO)-C-12 J = 1-0 lines in IRAS 05391-0217, 06114 + 1745 and 06291 + 0421, three new high-velocity bipolar molecular outflows are found . Parameters of these outflows are derived, which suggest that they are mas sive and energetic outflows with total kinetic energies of about 10(36) J a nd mass loss rates about 10(-5) H./a. The driving sources are identified by analyzing the positions, intensities and color temperatures of the associa ted infrared sources. These outflows are most likely driven by single sourc es which correspond to massive young stellar objects. In the se regions H2O masers have been detected located near the embedded infrared sources, whic h indicates that their exciting mechanism may be correlated with that of th e CO outflows. The relationship between the parameters of outflows anti cen tral sources shows that high-velocity outflow and thermal radiation of a st ar are two basic correlated but different features in the evolution of youn g stars.