The Evolution of Disk Accreting Proto-Stars and Their Role in Driving Bipolar Outflows

1993 ◽  
pp. 257-262
Author(s):  
G. S. Stringfellow
Keyword(s):  
Bipolar Outflows

Mapping of bipolar outflows and methanol masers in the CS(2-1)line

2001 ◽  
Vol 45 (5) ◽  
pp. 331-338
Author(s):  
G. M. Larionov ◽  
V. G. Promyslov ◽  
I. E. Val'tts
Keyword(s):  
Bipolar Outflows ◽  
Methanol Masers

SiO as a chemical signature of outflows from bright, compact sources in MSX IR-dark clouds

2004 ◽  
Vol 82 (6) ◽  
pp. 740-743 ◽  
Author(s):  
P A Feldman ◽  
R O Redman ◽  
L W Avery ◽  
J Di Francesco ◽  
J D Fiege ◽  
...  
Keyword(s):  
Star Formation ◽  
Young Stellar Objects ◽  
Line Profiles ◽  
Bipolar Outflows ◽  
Dark Cloud ◽  
Stellar Objects ◽  
Dark Clouds ◽  
Dense Cores ◽  
Infrared Dark Clouds ◽  
Compact Sources

The line profiles of dense cores in infrared-dark clouds indicate the presence of young stellar objects (YSOs), but the youth of the YSOs and the large distances to the clouds make it difficult to distinguish the outflows that normally accompany star formation from turbulence within the cloud. We report here the first unambiguous identification of a bipolar outflow from a young stellar object (YSO) in an infrared-dark cloud, using observations of SiO to distinguish the relatively small amounts of gas in the outflow from the rest of the ambient cloud. Key words: infrared-dark clouds, star formation, bipolar outflows, SiO, G81.56+0.10.

scholarly journals High-pressure, low-abundance water in bipolar outflows

2013 ◽  
Vol 551 ◽  
pp. A116 ◽  
Author(s):  
M. Tafalla ◽  
R. Liseau ◽  
B. Nisini ◽  
R. Bachiller ◽  
J. Santiago-García ◽  
...  
Keyword(s):  
High Pressure ◽  
Bipolar Outflows

A Unified Model for Bipolar Outflows from Young Stars: The Interplay of Magnetized Wide-angle Winds and Isothermal Toroids

2020 ◽  
Vol 905 (2) ◽  
pp. 116
Author(s):  
Hsien Shang ◽  
Ruben Krasnopolsky ◽  
Chun-Fan Liu ◽  
Liang-Yao Wang
Keyword(s):  
Unified Model ◽  
Young Stars ◽  
Wide Angle ◽  
Bipolar Outflows

scholarly journals Disks and Toroids Around Young Stars

1987 ◽  
Vol 115 ◽  
pp. 239-253 ◽  
Author(s):  
L.F. Rodríguez
Keyword(s):  
Star Formation ◽  
Main Sequence ◽  
Observational Evidence ◽  
Young Stars ◽  
The Other ◽  
Main Sequence Star ◽  
Circumstellar Disk ◽  
The Sun ◽  
Bipolar Outflows ◽  
The One

We review the observational evidence for interstellar and circumstellar size gaseous structures that appear to be collimating the bipolar outflows observed in regions of star formation. In particular, there is growing evidence for circumstellar disk-like objects that may be related to a protoplanetary cloud like the one that once surrounded the Sun. There are similarities between these disks around young stars and that found around the main sequence star β Pictoris. Both flattened structures around L1551 IRS5 and β Pictoris appear to have an inner “hole” with radius of a few tens of AU. On the other hand, there is observational support for focusing and collimation processes acting on the same source from tens of AU (circumstellar dimensions) to tenths of pc (interstellar dimensions).

scholarly journals Bipolar Outflows and Stellar Jets

1987 ◽  
Vol 115 ◽  
pp. 213-237 ◽  
Author(s):  
Ronald L. Snell
Keyword(s):  
Physical Properties ◽  
High Velocity ◽  
Molecular Clouds ◽  
Early Stage ◽  
Young Stellar Objects ◽  
Molecular Gas ◽  
Bipolar Outflows ◽  
Stellar Objects ◽  
Stellar Jets ◽  
Almost All

A wealth of data is now available on the energetic mass outflows that are associated with young stellar objects. This phenomenon is thought to occur at a very early stage in the evolution of stars of almost all masses. The discovery of this energetic event was first made through observations of the rapidly expanding molecular gas that surrounds many of these young stellar objects. A review of the physical properties, including the energetics and morphology, of the expanding molecular gas is presented in this paper. In addition, the role these energetic winds play in affecting the dynamics of the parental molecular clouds is also discussed. Finally, the results of detailed studies of the structure and kinematics of the high velocity molecular gas are reviewed and the evidence for existance of wind-swept cavities and molecular shells within the clouds are presented.

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