Results 121 to 130 of about 30,505 (211)

Radiative association in dense, H2-containing interstellar clouds

open access: yesThe Astrophysical Journal, 1976
A method for estimating the order of magnitude of rate coefficients of radiative association reactions involving polyatomic species is outlined. Calculations are undertaken on reactions of possible importance in dense interstellar clouds. Several of the calculated rate coefficients are utilized in a study of the gas phase syntheses of H/sub 2/CNH ...
openaire   +1 more source

SPHEREx Widefield Infrared Spectral Mapping of Interstellar Ices and Polycyclic Aromatic Hydrocarbons

open access: yesThe Astrophysical Journal
We present some of the first infrared spectral maps acquired by SPHEREx. These maps, which to our knowledge are the largest of their type ever compiled in the near-infrared, reveal multiple strong lines due to interstellar ices and polycyclic aromatic ...
Joseph L. Hora   +34 more
doaj   +1 more source

The Magnetic Keys to Massive Star Formation: The Western η Carinae Giant Molecular Cloud

open access: yesThe Astrophysical Journal
We present SOFIA/HAWC+ continuum polarization data on the magnetic fields ( B fields) threading 17 pc-scale massive molecular clumps at the western end of the η Carinae giant molecular cloud (Region 9 of the Galactic Census of High- and Medium-mass ...
Peter J. Barnes   +3 more
doaj   +1 more source

Extinction Distributions in Nearby Star-resolved Galaxies. II. M33

open access: yesThe Astronomical Journal
Extinction maps are essential for tracing interstellar dust and enabling accurate stellar population studies in galaxies. Here, a high-resolution extinction distribution of the nearby Triangulum galaxy (M33), is constructed by fitting multiband color ...
Yuxi Wang   +4 more
doaj   +1 more source

Mapping Our Path through the Local Interstellar Medium: High-resolution Ultraviolet Absorption Spectroscopy of Sight Lines along the Sun’s Historical Trajectory

open access: yesThe Astrophysical Journal
Using high-resolution UV data obtained from the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, we focus on eight sight lines along the Sun’s historical trajectory to reconstruct the morphology of our most recent interstellar ...
Hunter Vannier   +5 more
doaj   +1 more source

Dust emission and extinction in the Orion OMC-3 cloud

open access: yesAstronomy & Astrophysics
Context. Dust is an important tracer of the structure of interstellar clouds, as well as a central factor in the thermal balance and chemistry of the clouds.
Juvela Mika, Ysard Nathalie
doaj   +1 more source

Revealing that the Gas-phase Reaction of CN with H2S Can Be a Source of HSCN in Interstellar Molecular Clouds

open access: yesThe Astrophysical Journal
Sulfur-bearing molecules are key constituents of the interstellar medium (ISM). Particularly, hydrogen sulfide (H _2 S) and cyano (CN) radicals are key precursors of prebiotic molecules in the ISM.
María Antiñolo   +8 more
doaj   +1 more source

Photochemistry of interstellar molecules [PDF]

open access: yes
The photochemistry of two diatomic and eight polyatomic molecules is discussed quantitatively. For an interstellar molecule, the lifetime against photodecomposition depends upon the absorption cross section, the quantum yield or probability of ...
Stief, L. J.
core   +1 more source

Hydrogen Chloride in Dense Interstellar Clouds

open access: yesThe Astrophysical Journal, 1974
A. Dalgarno   +3 more
openaire   +1 more source

Molecule Formation in Dense Interstellar Clouds

open access: yesMolecule Formation in Dense Interstellar Clouds
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