First Principles Rovibronic Absorption Spectra of HF Molecule. [PDF]
J Comput ChemHydrogen fluoride (HF) is astrophysically important, as it has been detected in sunspots, Venus, red giants, and the interstellar medium, serving as a probe of exoplanet atmospheres. This article presents an ab initio investigation of HF rovibronic spectroscopy, combining high‐level electronic‐structure data with nuclear‐motion solutions and refinement
Abu El Kher N +5 more
europepmc +2 more sources
The contribution of unresolved sources on the gamma-ray spectrum of molecular clouds [PDF]
EPJ Web of Conferences, 2023 Fermi-LAT observations of the large-scale diffuse gamma-ray emission unveiled that in some locations, towards the inner Galaxy, the spectrum of this component is harder than the local one, measured at the Earth position. If this signal is associated with
Vecchiotti Vittoria +3 more
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A Search for OH 18 cm Emission from Intermediate-velocity Gas at High Galactic Latitudes
The Astrophysical Journal, 2023 We present search results of 22 high-latitude (∣ b ∣ > 25°) sightlines for OH 18 cm emission using the 305 m radio telescope at the Arecibo Observatory. These sightlines appear in neutral hydrogen emission at intermediate velocities −90 ≤ V _LSR ≤ −20 km
Allison J. Smith, D. Anish Roshi
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Diffuse interstellar band formation in dense clouds [PDF]
Astrophysics and Space Science, 1974 Measurements of the strengths of the diffuse interstellar bands at 4430, 5780 and 5797 A show that the bands tend to be weak with respect to extinction in dense interstellar clouds. Data on 10 stars in the Q Ophiuchi cloud complex show further that the diffuse band-producing efficiency of the grains decreases systematically with increasing grain size ...
Snow, Theodore P., Jr., Cohen, Judith G.
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High‐Pressure Carbonaceous Phases as Minerals
Geophysical Monograph Series, Page 11-23., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Oliver Tschauner
wiley +1 more source
The Distribution of Metallicities in the Local Galactic Interstellar Medium
The Astrophysical Journal, 2023 In this investigation, we present an analysis of the metallicity distribution that pertains to neutral gas in the local Galactic interstellar medium (ISM).
Adam M. Ritchey +5 more
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Chlorine Chemistry in Diffuse Interstellar Clouds [PDF]
Symposium - International Astronomical Union, 1980 The results of recent observations of the column densities of chlorine species in diffuse interstellar clouds are inconsistent with the column densities predicted by model calculations. The use of new atomic and molecular data fails to decrease the discrepancy.
John H. Black, Peter L. Smith
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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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A Reexamination of Phosphorus and Chlorine Depletions in the Diffuse Interstellar Medium
The Astrophysical Journal, 2023 We present a comprehensive examination of interstellar P and Cl abundances based on an analysis of archival spectra acquired with the Space Telescope Imaging Spectrograph of the Hubble Space Telescope and the Far Ultraviolet Spectroscopic Explorer ...
Adam M. Ritchey +3 more
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CO+ as a probe of the origin of CO in diffuse interstellar clouds [PDF]
Astronomy & Astrophysics, 2021 Context. The chemistry of the diffuse interstellar medium is driven by the combined influences of cosmic rays, ultraviolet (UV) radiation, and turbulence. Previously detected at the outer edges of photodissociation regions and formed from the reaction of C+ and OH, CO+ is the main chemical precursor of HCO+ and CO in a thermal, cosmic-ray, and UV ...
Gérin, Maryvonne, Liszt, Harvey
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