Results 21 to 30 of about 2,384 (264)
CH observations of diffuse molecular clouds
The Astrophysical Journal, 1989 A survey of CH 3.3 GHz emission from a sample of high-latitude molecular clouds, diffuse clouds, and heavily reddened globular clusters is presented. The F = 1-1 main-line transition was detected in every molecular cloud in the sample and in two out of four globular cluster lines of sight. The high rate of detections in the low-extinction high-latitude
Loris Magnani +3 more
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The Behavior of Selected Diffuse Interstellar Bands with Molecular Fraction in Diffuse Atomic and Molecular Clouds [PDF]
The Astrophysical Journal, 2017 Abstract We study the behavior of eight diffuse interstellar bands (DIBs) in different interstellar environments, as characterized by the fraction of hydrogen in molecular form (f H2), with comparisons to the corresponding behavior of various known atomic and molecular species. The equivalent widths of the five “normal”
Haoyu Fan +12 more
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Far-ultraviolet Dust Extinction and Molecular Hydrogen in the Diffuse Milky Way Interstellar Medium
The Astrophysical Journal, 2023 We aim to compare variations in the full-UV dust extinction curve (912–3000 Å), with the H i /H _2 /total H content along diffuse Milky Way sightlines, to investigate possible connections between ISM conditions and dust properties. We combine an existing
Dries Van De Putte +4 more
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Frontiers in Astronomy and Space Sciences, 2021 Stellar systems are often formed through the collapse of dense molecular clouds which, in turn, return copious amounts of atomic and molecular material to the interstellar medium.
Duncan V. Mifsud +6 more
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Molecular Formation in Hot Diffuse Clouds [PDF]
Symposium - International Astronomical Union, 1980 A description is given of the processes of molecular formation and destruction in diffuse interstellar clouds and detailed models of the clouds lying towards ζ Ophiuchi, ζ Persei and o Persei are used to assess the validity of gas phase chemistry. Modifications that may arise from shock-heated regions are discussed.
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Estimating molecular hydrogen in diffuse interstellar clouds [PDF]
Monthly Notices of the Royal Astronomical Society, 1989 La densite de colonne de l'hydrogene moleculaire dans les nuages interstellaires diffus peut etre estimee de maniere satisfaisante par 2 methodes: a partir de la densite de colonne de l'hydrogene atomique combinee avec E(B-V); et a partir des observations optiques des molecules ...
W. B. Somerville, C. A. Smith
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CTA and cosmic-ray diffusion in molecular clouds [PDF]
AIP Conference Proceedings, 2012 In Proceedings of the 2012 Heidelberg Symposium on High Energy Gamma-Ray Astronomy.
Pedaletti, G. +5 more
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Denoising Diffusion Probabilistic Models to Predict the Density of Molecular Clouds
The Astrophysical Journal, 2023 Abstract We introduce the state-of-the-art deep-learning denoising diffusion probabilistic model as a method to infer the volume or number density of giant molecular clouds (GMCs) from projected mass surface density maps. We adopt magnetohydrodynamic simulations with different global magnetic field strengths and large-scale dynamics, i.e.
Duo Xu +3 more
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Towards an anagraphical picture of high-energy Galactic neutrinos [PDF]
EPJ Web of Conferences, 2019 The TeV/PeV neutrino emission from our Galaxy is related to the distribution of cosmic-ray accelerators, their maximal energy of injection as well as the propagation of injected particles and their interaction with molecular gas.
Marinelli Antonio +2 more
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Probing the turbulent ambipolar diffusion scale in molecular clouds with spectroscopy [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 14 pages, accepted for publication in ...
Hezareh, Talayeh +4 more
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