Results 61 to 70 of about 238,168 (251)

Turbulent Driving Scales in Molecular Clouds

, 2009
Supersonic turbulence in molecular clouds is a dominant agent that strongly affects the clouds' evolution and star formation activity. Turbulence may be initiated and maintained by a number of processes, acting at a wide range of physical scales.
Anathpindika, Ballesteros-Paredes, Ballesteros-Paredes, Bally, Banerjee, Basu, Bergin, Brunt, Brunt, Brunt, Brunt, Brunt, C. M. Brunt, Dale, Dobbs, Elmegreen, Elmegreen, Falgarone, Glover, Goldsmith, Hartmann, Heitsch, Heyer, Heyer, Heyer, Heyer, Kim, Klessen, Knee, Koda, Larson, Lazarian, Lazarian, M. H. Heyer, M.-M. Mac Low, Mac Low, Mac Low, Mac Low, Matzner, Miesch, Offner, Ossenkopf, Ostriker, Pan, Price, Quillen, Ridge, Ridge, Rosolowsky, Scalo, Schneider, Shu, Stone, Stone, Stone, Swift, Walawender   +56 more
core   +1 more source

The energetics of molecular clouds. II - The S140 molecular cloud

The Astrophysical Journal, 1978
Techniques of analysis which allow estimates of kinetic temperature, gas density, gas cooling rate, and dust cooling rate are applied to the S140 molecular cloud. Maps of this cloud in various molecular lines are examined which reveal the existence of a strong temperature and density peak near the H-alpha rim and the presence of a strong near-IR source
William L. Peters, G. N. Blair, N. J. Evans, P. A. Vanden Bout   +3 more
openaire   +2 more sources

Characterizing the 3D Structure of Molecular Cloud Envelopes in the Cloud Factory Simulations

The Astrophysical Journal
We leverage recent numerical simulations of highly resolved star-forming regions in a Milky Way–like galaxy to explore the nature of extended gaseous envelopes around molecular clouds.
Elijah Mullens, Catherine Zucker, Claire E. Murray, Rowan Smith   +3 more
doaj   +1 more source

The simulation of molecular clouds formation in the Milky Way [PDF]

, 2012
Using 3D hydrodynamic calculations we simulate formation of molecular clouds in the Galaxy. The simulations take into account molecular hydrogen chemical kinetics, cooling and heating processes.
A. M. Sobolev, A. V. Khoperskov, Amores, Asplund, Baba, Bakes, Balbus, Ballesteros-Paredes, Barnes, Beaumont, Begeman, Bergin, Binney, Blitz, Bobylev, Cazaux, Cen, Chou, Cohen, Cox, Dame, Dame, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Draine, E. O. Vasiliev, Elmegreen, Elmegreen, Elmegreen, Englmaier, Falgarone, Feldmann, Field, Fridman, Galli, Glover, Goldsmith, Habing, Heyer, Hollenbach, Hollenbach, Kalberla, Kauffmann, Khoperskov, Khoperskov, Kim, Kirsanova, Kwan, Lada, Lada, Larson, Lepine, Levine, Levinson, Mac Low, Maloney, McClure-Griffiths, McKee, Mishurov, Nelson, Rathborne, Roberts, Roberts, Rodriguez-Fernandez, Román-Duval, Román-Zúñiga, S. A. Khoperskov, Shetty, Shetty, Shu, Sofue, Solomon, Stecker, Sutherland, Tasker, Tielens, Tomisaka, Vallee, van Leer, Wada, Wada, Wada, Wada, Wolfire, Zhang   +88 more
core   +1 more source

In Search of Infall Motion in Molecular Clumps. IV. Mapping of the Global Infall Sources

The Astrophysical Journal, 2023
We have used the IRAM 30 m telescope to map some targets with HCO ^+ (1–0) and H ^13 CO ^+ (1–0) lines in order to search for evidence of gas infall in clumps. In this paper, we report the mapping results for 13 targets.
Yang Yang, Xi Chen, Zhibo Jiang, Zhiwei Chen, Shuling Yu, Jun Li   +5 more
doaj   +1 more source

Formation of Massive Molecular Cloud Cores by Cloud-cloud Collision [PDF]

, 2013
Recent observations of molecular clouds around rich massive star clusters including NGC3603, Westerlund 2, and M20 revealed that the formation of massive stars could be triggered by a cloud-cloud collision. By using three-dimensional, isothermal, magnetohydrodynamics simulations with the effect of self-gravity, we demonstrate that massive ...
arxiv   +1 more source

Magnetohydrodynamic Simulations of the Formation of Molecular Clouds toward the Stellar Cluster Westerlund 2: Interaction of a Jet with Clumpy Interstellar Medium [PDF]

The Astrophysical Journal, Volume 836, Number 2, (2017), 2017
The formation mechanism of CO clouds observed with NANTEN2 and Mopra telescope toward the stellar cluster Westerlund 2 is studied by three-dimensional magnetohydrodynamic (MHD) simulations taking into account the interstellar cooling. These molecular clouds show a peculiar shape composing of an arc-shaped cloud in one side of a TeV-ray source HESS ...
arxiv   +1 more source

Turbulence in Molecular Clouds [PDF]

, 1999
24 pages, 1 Latex file, 2 style files. To appear in ``Millimetric and Sub-Millimetric Astronomy. INAOE 1996 Summer School''
openaire   +3 more sources

Warm Molecular Clouds [PDF]

Symposium - International Astronomical Union, 1992
Warm molecular gas is important in a large range of astronomical contexts. We discuss here determinations of the temperature and mass of warm material in protostellar disks and cores, photon dominated regions, and molecular material shocked by protostellar outflows. We then compare these results to heating and cooling models.
openaire   +2 more sources

Molecular-Cloud Clusters and Chains [PDF]

Symposium - International Astronomical Union, 1985
We report some preliminary results from the Massachusetts - Stony Brook CO survey of the first galactic quadrant using the 14-meter millimeterwave telescope of the Five College Radio Astronomy Observatory. The survey contains approximately 50 000 observations spaced every 3 arcminutes in 1 and b between longitudes 0° and 90° and latitudes −1° and 1 ...
Sanders, D. B., Clemens, D. P., Scoville, N. Z., Solomon, P. M.   +3 more
openaire   +5 more sources