Results 1 to 10 of about 3,351,391 (293)
Review of Zeeman Effect Observations of Regions of Star Formation
Frontiers in Astronomy and Space Sciences, 2019 The Zeeman effect is the only observational technique available to measure directly the strength of magnetic fields in regions of star formation. This chapter reviews the physics of the Zeeman effect and its practical use in both extended gas and in ...
Richard M. Crutcher, Athol J. Kemball
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Understanding the Kinetic Energy Deposition within Molecular Clouds
The Astrophysical Journal, 2023 According to the structures traced by ^13 CO spectral lines within ^12 CO molecular clouds (MCs), we investigate the contributions of their internal gas motions and relative motions to the total velocity dispersions of ^12 CO MCs. Our samples of 2851 ^12
Lixia Yuan +10 more
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On the Spatial Distribution of 13CO Structures within 12CO Molecular Clouds
The Astrophysical Journal, 2023 We look into the 2851 ^12 CO molecular clouds harboring ^13 CO structures to reveal the distribution of the projected angular separations and radial velocity separations between their internal ^13 CO structures.
Lixia Yuan +10 more
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RETHINKING A MYSTERIOUS MOLECULAR CLOUD [PDF]
The Astrophysical Journal, 2015 Accepted for publication in ApJ. 16 pages, 13 figures.
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Star Formation Efficiency and Class I Protostellar Timescales in ATLASGAL Dense Clumps
UniverseStar formation in galactic dense clumps is commonly interpreted using nearly uniform protostellar evolutionary timescales, yet the extent to which such assumptions obscure variations in star formation efficiency remains uncertain. Using 60 ATLASGAL dense
Moses Onyemaechi Asogwa +3 more
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Outer-Galaxy molecular clouds [PDF]
Symposium - International Astronomical Union, 1985 Since our original report of CO emission from outside the solar circle in the first quadrant (Kutner and Mead, 1981) we have extended the observations in two ways: (1) We have improved latitude and longitude coverage. Preliminary results on the latitude distribution were reported by Kutner (1983).
Marc L. Kutner, Kathryn N. Mead
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Molecular Clouds at High Z [PDF]
Symposium - International Astronomical Union, 1991 The evidence for the existence of molecular clouds at large distances from the Galactic plane is reviewed. The molecular clouds at high Galactic latitudes are shown to be largely confined to the Galactic plane. There is evidence for one giant molecular cloud as much as four scale heights from the Galactic plane, but given the sample size from which the
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Analysis of Hydrogen Cyanide Hyperfine Spectral Components towards Star Forming Cores
Open Astronomy, 2011 Although hydrogen cyanide has become quite a common molecular tracing species for a variety of astrophysical sources, it, however, exhibits dramatic non-LTE behaviour in its hyperfine line structure.
Loughnane R. M. +4 more
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Astronomy & AstrophysicsHigh-resolution JWST images of nearby spiral galaxies reveal polycyclic aromatic hydrocarbon (PAH) structures that potentially trace molecular clouds, even CO-dark regions.
Bazzi Z. +26 more
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Supernova remnants in molecular clouds [PDF]
AIP Conference Proceedings, 1999 31 pages, 4 figures, revised, in press, ApJ, Feb.
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