Results 1 to 10 of about 3,373,419 (307)

Polarization calibration of spaceborne lidar using dense cirrus–scattered solar background with molecular scattering correction [PDF]

Atmospheric Measurement Techniques
Accurate calibration is essential for spaceborne polarization-sensitive lidars, as biases in depolarization ratio measurements can significantly affect the retrieval of cloud and aerosol properties.
Z. Liu, M. A. Vaughan, M. A. Vaughan, P. Zhai, A. E. Garnier, A. E. Garnier, S. Zeng, S. D. Rodier, S. D. Rodier, Y. Hu, A. H. Omar, C. R. Trepte   +11 more
doaj   +1 more source

Star Formation in Molecular Clouds [PDF]

Symposium - International Astronomical Union, 1985
We examine how star formation occurs in the Galaxy and come to the following conclusions. (1) The distribution of newly-born stars in the Galaxy depends on the origin of giant-molecular-cloud complexes. For individual complexes, we favor the mechanism of Parker's instability behind galactic shocks.
openaire   +1 more source

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

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   +1 more source

Velocity Structure and Molecular Formation in the Polaris Molecular Cloud

The Astrophysical Journal
We present a wide-field $(60^{\prime} \times 30^{\prime} )$ study of a dense region within the Polaris Flare using ^12 CO, ^13 CO, and C ^18 O ( J  = 1–0) observations at 15″ resolution, obtained with the Nobeyama 45 m Radio Telescope.
Tomomi Shimoikura, Kazuhito Dobashi, Fumitaka Nakamura, Kotomi Taniguchi   +3 more
doaj   +1 more source

The Stellar “Snake”. III. Coevolution of Stars and Molecular Clouds Unveiled by Gaia, MWISP, and LAMOST

The Astrophysical Journal Supplement Series
By combining multiband data from Gaia DR3, MWISP CO, and LAMOST DR11 low-resolution spectra/medium-resolution spectra (LRS/MRS), we investigate the coevolution of stars and their parent molecular cloud in a snakelike stellar structure, named Snake III ...
Jia-Peng Li, Hai-Jun Tian, Chen Wang, Xiang-Ming Yang, Fan Wang   +4 more
doaj   +1 more source

The Nature of Shocks in Molecular Clouds [PDF]

International Astronomical Union Colloquium, 1989
AbstractEvidence is presented to suggest that the shocked molecular hydrogen emission in the brightest part of the Orion outflow is produced in a J-shock and not a C-shock; that this is true throughout the entire flow; that it may be true in many outflow sources; and that this exacerbates problems with current explanations of the very wide velocity ...
openaire   +1 more source

Cloud Tides Can Induce the Fast Disruption of Star Clusters and Offer an Explanation for Gaia Strings

The Astrophysical Journal
Young stars form in clusters within molecular clouds, but older stars are evenly distributed across the galactic disk, necessitating an explanation for cluster dissolution.
Xiao-Tong Chen, Guang-Xing Li
doaj   +1 more source

A Study of the Physical Properties and Star Formation Activity of a Large Sample of Molecular Clouds. I. Distances

The Astrophysical Journal Supplement Series
Accurate distances to molecular clouds are crucial for determining their physical properties, understanding star formation, and tracing Galactic spiral structure.
Juan Mei, Min Fang, Miaomiao Zhang, Qing-Zeng Yan, Lixia Yuan, Xuepeng Chen, Zhiwei Chen, Yang Su, Shiyu Zhang, Zhibo Jiang, Ji Yang   +10 more
doaj   +1 more source

Hierarchical structure of the interstellar molecular clouds and star formation

Open Astronomy, 2017
Properties of the hierarchical structures of interstellar molecular clouds are discussed. Particular attention is paid to the statistical correlations between velocity dispersion and size, and between the magnetic field strength and gas density.
Dudorov Alexander E., Khaibrakhmanov Sergey A.   +1 more
doaj   +1 more source

A scaling relation for the molecular cloud lifetime in Milky Way-like galaxies. [PDF]

Mon Not R Astron Soc, 2021
Jeffreson SMR, Keller BW, Winter AJ, Chevance M, Kruijssen JMD, Krumholz MR, Fujimoto Y.   +6 more
europepmc   +1 more source