Results 1 to 10 of about 238,168 (251)

Turbulent molecular clouds [PDF]

The Astronomy and Astrophysics Review, 2012
Stars form within molecular clouds but our understanding of this fundamental process remains hampered by the complexity of the physics that drives their evolution. We review our observational and theoretical knowledge of molecular clouds trying to confront the two approaches wherever possible.
Falgarone, Edith, Hennebelle, Patrick
arxiv   +10 more sources

Angular Momentum in Giant Molecular Clouds. I. The Milky Way [PDF]

, 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. To that end, we present first-moment intensity-weighted velocity maps of the molecular clouds and surrounding atomic gas. The maps are made from high-resolution 13CO observations and 21-
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
arxiv   +3 more sources

The Correlation Between Dust and Gas Contents in Molecular Clouds [PDF]

The Astronomical Journal
Molecular clouds are regions of dense gas and dust in space where new stars and planets are born. There is a strong correlation between the distribution of dust and molecular gas in molecular clouds.
Rui-Zhi Li, Bing-Qiu Chen, Guang-Xing Li, Bo-Ting Wang, Hao-Ming Ren, Qi-Ning Guo   +5 more
doaj   +2 more sources

The generation of low-energy cosmic rays in molecular clouds [PDF]

Astron.Rep. 49 (2005) 269-273, 2005
It is argued that if cosmic rays penetrate into molecular clouds, the total energy they lose can exceed the energy from galactic supernovae shocks. It is shown that most likely galactic cosmic rays interacting with the surface layers of molecular clouds are efficiently reflected and do not penetrate into the cloud interior. Low-energy cosmic rays ($E<1$
A. M. Bykov, A. M. Bykov, A. M. Bykov, C. J. Cesarsky, D. C. Ellison, E. Falgarone, E. Falgarone, E. J. O’Donnell, E. Vazquez-Semadeni, F. J. Vrba, I. N. Toptygin, J. A. Simpson, J. Ballesteros-Paredes, J. Bally, J. Barsuhn, J. G. Vestuto, J. P. Phillips, L. O’C. Drury, M. A. Lee, M. H. Heyer, P. C. Myers, P. C. Myers, P. Padoan, R. Blandford, R. Schlickeiser, S. Boldyrev, S. D. Doty, T. Nakano, W. D. Watson, W.-T. Kim, Yu. A. Shchekinov   +30 more
arxiv   +4 more sources

The Influence of Non-Uniform Cloud Cover on Transit Transmission Spectra [PDF]

, 2015
We model the impact of non-uniform cloud cover on transit transmission spectra. Patchy clouds exist in nearly every solar system atmosphere, brown dwarfs, and transiting exoplanets. Our major findings suggest that fractional cloud coverage can exactly mimic high mean molecular weight atmospheres and vice-versa over certain wavelength regions, in ...
Line, Michael R., Parmentier, Vivien
arxiv   +3 more sources

3D MC. I. X-Ray Tomography Begins to Unravel the 3D Structure of a Molecular Cloud in our Galaxy’s Center [PDF]

The Astrophysical Journal Letters
Astronomers have used observations of the Galactic gas and dust via infrared, microwave, and radio to study molecular clouds in extreme environments such as the Galactic center.
Samantha W. Brunker, Cara Battersby, Danya Alboslani, Maïca Clavel, Daniel L. Walker, Dani Lipman, H Perry Hatchfield, Régis Terrier   +7 more
doaj   +2 more sources

Magnetic field properties in star formation: A review of their analysis methods and interpretation

Frontiers in Astronomy and Space Sciences, 2022
Linearly polarized emission from dust grains and molecular spectroscopy is an effective probe of the magnetic field topology in the interstellar medium and molecular clouds.
Junhao Liu, Qizhou Zhang, Keping Qiu, Keping Qiu   +3 more
doaj   +1 more source

12CO (3–2) High-Resolution Survey (COHRS) of the Galactic Plane: Complete Data Release

The Astrophysical Journal Supplement Series, 2022
We present the full data release of the ^12 CO (3–2) High-Resolution Survey (COHRS), which has mapped the inner Galactic plane over the range of 9.°5 ≤ l ≤ 62.°3 and ∣ b ∣ ≤ 0.°5.
Geumsook Park, Malcolm J. Currie, Holly S. Thomas, Erik Rosolowsky, Jessica T. Dempsey, Kee-Tae Kim, Andrew J. Rigby, Yang Su, David J. Eden, Dario Colombo, Harriet Parsons, Toby J. T. Moore   +11 more
doaj   +1 more source

The Molecular Clouds in a Section of the Third Galactic Quadrant: Cloud Catalog

The Astronomical Journal, 2023
We present results of cloud catalogs of ^12 CO, ^13 CO, and C ^18 O ( J = 1–0) in a section of the third Galactic quadrant over (195° < l < 220°, ∣ b ∣ < 5°) from the Milky Way Imaging Scroll Painting project.
Chen Wang, Haoran Feng, Ji Yang, Xuepeng Chen, Yang Su, Qinq-Zeng Yan, Fujun Du, Yuehui Ma, Jiajun Cai   +8 more
doaj   +1 more source

A Mesofractal Model of Interstellar Cloudiness

Universe, 2022
The interstellar medium (ISM), serving as a background for the propagation of cosmic rays (CRs) and other information carriers, has a complex ragged structure.
Vladimir V. Uchaikin, Ilya I. Kozhemyakin   +1 more
doaj   +1 more source