Results 91 to 100 of about 4,621,719 (221)

The Molecular Clouds of M31

The Astrophysical Journal
Abstract Deep interferometric observations of CO and dust continuum emission are obtained with the Submillimeter Array at 230 GHz to investigate the physical nature of the giant molecular cloud (GMC) population in the Andromeda galaxy (M31).
Charles J. Lada, Jan Forbrich, Glen Petitpas, Sébastien Viaene   +3 more
openaire   +3 more sources

Angular Momentum in Giant Molecular Clouds. I. The Milky Way

, 2011
We present a detailed analysis comparing the velocity fields in molecular clouds and the atomic gas that surrounds them in order to address the origin of the gradients.
Blitz, Blitz, Blitz, Burkert, Burkert, Carpenter, Castets, Celnik, Crutcher, de Zeeuw, Elmegreen, Engargiola, Falgarone, Flaccomio, Furész, Heiles, Heyer, Kim, Kuchar, Leo Blitz, Mestel, Mizuno, Mouschovias, Nagahama, Nia Imara, Ramírez, Rosolowsky, Sagar, Sancisi   +28 more
core   +1 more source

Gravitational Collapse and Filament Formation: Comparison with the Pipe Nebula [PDF]

, 2009
Recent models of molecular cloud formation and evolution suggest that such clouds are dynamic and generally exhibit gravitational collapse. We present a simple analytic model of global collapse onto a filament and compare this with our numerical ...
Ballesteros-Paredes, Ballesteros-Paredes, Ballesteros-Paredes, Ballesteros-Paredes, Bernes, Burkert, Covey, Elmegreen, Fabian Heitsch, Forbrich, Gong, Gómez, Hartmann, Hartmann, Hartmann, Heitsch, Heitsch, Heitsch, Heitsch, Heyer, Javier Ballesteros-Paredes, Kim, Kirk, Kirk, Klessen, Koyama, Lada, Lee Hartmann, Li, McKee, Muench, Onishi, Padoan, Patel, Rathborne, Rathborne, Schnee, Stone, Tobin, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Walsh, Walsh   +43 more
core   +3 more sources

A CO Line and Infrared Continuum Study of the Active Star-Forming Complex W51

, 2010
We present the results of an extensive observational study of the active star-forming complex W51 that was observed in the J=2-1 transition of the 12CO and 13CO molecules over a 1.25 deg x 1.00 deg region with the University of Arizona Heinrich Hertz ...
Arnal, Beuther, Bieging, Brand, Burton, Carey, Carpenter, Craig A. Kulesa, Crampton, Cyganowski, Downes, Elmegreen, Fazio, Figuerêdo, Genzel, Goss, Goudis, Gritschneder, Habe, Imai, Israel, Jackson, John H. Bieging, Kang, Kang, Klein, Koo, Koo, Koo, Kulesa, Kundu, Miju Kang, Minho Choi, Pankonin, Povich, Rieke, Robitaille, Sakamoto, Sault, Shepherd, Skrutskie, Smith, Subrahmanyan, van Gorkom, Walborn, William L. Peters, Williams, Wilson, Xu, Youngung Lee   +49 more
core   +1 more source

Molecular outflows identified in the FCRAO CO survey of the Taurus Molecular Cloud [PDF]

, 2012
Jets and outflows are an integral part of the star formation process. While there are many detailed studies of molecular outflows towards individual star-forming sites, few studies have surveyed an entire star-forming molecular cloud for this phenomenon.
G. Narayanan, R. Snell, A. Bemis
semanticscholar   +1 more source

The alignment of molecular cloud magnetic fields with the spiral arms in M33 [PDF]

Nature, 2011
The formation of molecular clouds, which serve as stellar nurseries in galaxies, is poorly understood. A class of cloud formation models suggests that a large-scale galactic magnetic field is irrelevant at the scale of individual clouds, because the ...
Hua-b. Li, T. Henning
semanticscholar   +1 more source

The Dark Molecular Gas

, 2010
The mass of molecular gas in an interstellar cloud is often measured using line emission from low rotational levels of CO, which are sensitive to the CO mass, and then scaling to the assumed molecular hydrogen H_2 mass.
Abdo, Badnell, Bloemen, Bolatto, Burgh, Christopher F. McKee, Dame, David Hollenbach, Dubernet, Dufour, Gillmon, Glover, Goldsmith, Goodman, Habing, Heyer, Hollenbach, Indriolo, Israel, Kaufman, Kaufman, Krumholz, Krumholz, Larson, Le Petit, Leroy, Mark G. Wolfire, McCall, McKee, Mizuno, Nahar, Ostriker, Padoan, Piontek, Rachford, Rathborne, Sanders, Sheffer, Sofia, Sonnentrucker, Strong, Weingartner, Williams, Wolfire, Wolfire, Yamamoto   +45 more
core   +1 more source

How long does it take to form a molecular cloud [PDF]

, 2012
We present the first numerical simulations that self-consistently follow the formation of dense molecular clouds in colliding flows. Our calculations include a time-dependent model for the H2 and CO chemistry that runs alongside a detailed treatment of ...
P. Clark, S. Glover, R. Klessen, I. Bonnell   +3 more
semanticscholar   +1 more source

Cosmic Rays and Molecular Clouds [PDF]

, 2013
To appear in the proceedings of the San Cugat Forum on Astrophysics 2012, 27 pages, 10 ...
openaire   +4 more sources

RETHINKING A MYSTERIOUS MOLECULAR CLOUD [PDF]

The Astrophysical Journal, 2015
Accepted for publication in ApJ. 16 pages, 13 figures.
openaire   +4 more sources