Results 21 to 30 of about 3,351,391 (293)
Fragmentation in molecular clouds [PDF]
Symposium - International Astronomical Union, 1991 B209. Fragments are detected in the outer parts of the B209 molecular cloud in a region of density 1000 cm −3 using 12 CO, 13 CO, H 2 CO, IRAS 60 and 100
Frank O. Clark +2 more
openaire +1 more source
CO TO H2 RATIO OF INTERSTELLAR MOLECULAR CLOUDS IN THE DIRECTIONS OF EARLY TYPE STARS [PDF]
Journal of Astronomy and Space Sciences, 2004 We present measurements of interstellar CO absorption lines in the spectra of 7 early-type stars that were observed with the FUSE(Far Ultraviolet Spectroscopic Explorer).
Jae-Woo Park +2 more
doaj +1 more source
Molecular line signatures of cloud–cloud collisions [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Collisions between interstellar gas clouds are potentially an important mechanism for triggering star formation. This is because they are able to rapidly generate large masses of dense gas. Observationally, cloud collisions are often identified in position–velocity (PV) space through bridging features between intensity peaks ...
Priestley, F. D., Whitworth, A. P.
openaire +3 more sources
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 +8 more
doaj +1 more source
Molecular Abundances in the Sgr a Molecular Cloud [PDF]
Symposium - International Astronomical Union, 1992 We have obtained column densities for HCO+, HCO, HCS+, C3H2, HC5N, SiO, OCS, HCOOH, CH3CH2 OH, and CH3CCH toward Sgr A. The fractional abundance of SiO relative to molecular hydrogen in Sgr A is comparable to that for the Orion plateau, ~ 10−7 − 10−8, which may be a typical value for hot clouds.
Y. C. Minh, W. M. Irvine, P. Friberg
openaire +1 more source
Thermal desorption of water ice in the interstellar medium [PDF]
, 2001 Water (H2O) ice is an important solid constituent of many astrophysical environments. To comprehend the role of such ices in the chemistry and evolution of dense molecular clouds and comets, it is necessary to understand the freeze-out, potential surface
Collings, Mark P. +3 more
core +5 more sources
Molecular-Clump Detection Based on an Improved YOLOv5 Joint Density Peak Clustering
Universe, 2023 The detection and analysis of molecular clumps can lead to a better understanding of star formation in the Milky Way. Herein, we present a molecular-clump-detection method based on improved YOLOv5 joint Density Peak Clustering (DPC). The method employs a
Jin-Bo Hu +6 more
doaj +1 more source
Evolution of prolate molecular clouds at HII boundaries - I. formation of fragment-core structures [PDF]
, 2014 The evolution of a prolate cloud at an HII boundary is investigated using smoothed particle hydrodynamics. The prolate molecular clouds in our investigation are setwith their semi-major axis perpendicular to the radiative direction of a plane-parallel ...
Goodwin S +10 more
core +1 more source
Study the Effect of Perturbation in the Evolution of the Filamentary Molecular Clouds [PDF]
Iranian Journal of Astronomy and Astrophysics, 2020 Observatory studies indicate that stars are caused by the collapse of dense molecular clouds, and thermal instability can be a factor in creating this collapse.
Maryam Mesgaran, Khodadad Kokabi
doaj +1 more source
The Astrophysical Journal, 1984 CO observations of the peculiar galaxy M82 have been made at 79 positions using the 14 m FCRAO telescope (HPBW = 50'') in order to obtain a fully sampled map of the central 2 kpc as well as the radial distribution of molecular gas out to 3 kpc along the major axis.
Young, JS, SCOVILLE, NZ
openaire +2 more sources