VIBRATIONALLY EXCITED CS - A NEW PROBE OF CONDITIONS IN YOUNG PROTOSTELLAR SYSTEMS

Authors
WALKER CK MALONEY PR SERABYN E
Citation
Ck. Walker et al., VIBRATIONALLY EXCITED CS - A NEW PROBE OF CONDITIONS IN YOUNG PROTOSTELLAR SYSTEMS, The Astrophysical journal, 437(2), 1994, pp. 120000127-120000130
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
437
Issue
2
Year of publication
1994
Part
2
Pages
120000127 - 120000130
Database
ISI
SICI code
0004-637X(1994)437:2<120000127:VEC-AN>2.0.ZU;2-S
Abstract
We present the first detection of vibrationally excited (CS)-S-32 J = 10 --> 9 and J = 7 --> 6 emission toward a young stellar object. Towar d IRAS 16293-2422, the vibrationally excited (CS)-S-32 emission is red shifted similar to 3.9 km s(-1) from the systemic velocity of the core . The emission must arise in warm (T greater than or similar to 1000 K ), dense (n greater than or similar to 10(11)-10(12) cm(-3)) gas. The most plausible origin for the emission appears to be self-gravitating instabilities in a protostellar accretion disk, which produce waves an d shocks.