Accretion flows in high-mass star formation [Book Chapter]
Conference
·
· Lecture Notes in Physics Structure and Dynamics of the Interstellar medium
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
We compare observed and simulated images of the accretion flows associated with high mass star formation in the regions G10.6-0.4 and DR21. We describe, as a result of the comparison, the temperature, density, and velocity fields. Our results indicate that the G10.6-0.4 cloud core is strongly condensed and has approximately equal velocities in rotation and infall at its current evolutionary state. The rapid collapse and lack of rotational support suggests that significant angular momentum transfer is occurring over scales at least as large as those observed (0.5 pc). A milligauss magnetic field would have sufficient energy to supply the required braking torque of 1047 ergs. The DR21 core shows approximately spherically symmetric radial accretion with no detectable rotation. Unlike the G10.6-0.4 core, the DR21 core does not contain an embedded HII region. Thus this core may represent a molecular cloud condensation undergoing gravitational collapse and accretion just prior to the formation of massive stars.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7163795
- Report Number(s):
- UCRL-101123; CONF-8904318--1; ON: DE90007251; ISBN: 978-3-540-46865-3
- Conference Information:
- Journal Name: Lecture Notes in Physics Structure and Dynamics of the Interstellar medium
- Country of Publication:
- United States
- Language:
- English
The molecular core associated with DR 21
|
journal | March 1985 |
Molecular clouds associated with compact H II regions. III - Spin-up and collapse in the core of G10.6 - 0.4
|
journal | May 1986 |
The observed structure of the accretion flow around G10.6-0.4
|
journal | January 1988 |
Temperature and density structure of the collapsing core of G10.6-0.4
|
journal | July 1987 |
VLA observations of DR 21 NH3 /1, 1/ absorption - Direct evidence for clumping
|
journal | November 1981 |
2(11)-2(12) formaldehyde emission from DR 21(OH)
|
journal | October 1984 |
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