Results 161 to 170 of about 34,807 (192)

X-ray absorption spectroscopy of FeH⁺ to aid its identification in astrochemical environments.

Chem Commun (Camb)
Jin S, Flach M, Ebenbichler A, Cunningham EM, Zamudio-Bayer V, Hirsch K, van der Linde C, Przybilla N, Ončák M, Lau JT, Beyer MK.   +10 more
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Predicting accurate binding energies and vibrational spectroscopic features of interstellar icy species. A quantum mechanical study.

Phys Chem Chem Phys
Bulik A, Martínez-Bachs B, Bancone N, Mates-Torres E, Corno M, Ugliengo P, Rimola A.   +6 more
europepmc   +1 more source

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Observations of Small-Scale Interstellar Structure in Dense Atomic Gas

The Astrophysical Journal, 1999
We present high-resolution (R ~ 170,000) Kitt Peak National Observatory coude feed telescope observations of the interstellar K I λ7698 line toward five multiple star systems with saturated Na I components. We compare the K I absorption-line profiles in each of the two (or three) lines of sight in these systems and find significant differences between ...
J. T. Lauroesch, David M. Meyer
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Evidence for the Heating of Atomic Interstellar Gas by Polycyclic Aromatic Hydrocarbons

The Astrophysical Journal, 2001
We report a strong correlation between the [C II] 158 ?m cooling line and the mid-infrared flux in the 5-10 ?m range in a wide variety of star-forming galaxies. The mid-infrared flux is dominated by the aromatic features in emission (AFEs), which are thought to arise from large polycyclic aromatic hydrocarbons (PAHs) and are generally associated with ...
George Helou, Sangeeta Malhotra, David J. Hollenbach, Daniel A. Dale, Alessandra Contursi   +4 more
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SKA studies of atomic gas in the interstellar medium of the Milky Way

New Astronomy Reviews, 2004
Abstract The λ21-cm line is an excellent tracer of the neutral interstellar medium (ISM). Atomic hydrogen (H I ) is found in a variety of environments, from dense clouds to the diffuse galactic halo, and its filling factor is often high, so structures with sizes over a wide range of scales can be mapped with this line.
John M. Dickey, N.M. McClure-Griffiths, Felix J. Lockman   +2 more
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Gas phase chemistry of pyrene and related cations with molecules and atoms of interstellar interest

International Journal of Mass Spectrometry, 1999
AbstractThe chemistry of the pyrene radical cation C 16 H 101 and its derivatives C 16 H 91 and C 16 H 111 has been investigated in the gasphase using a flowing afterglow-selected ion flow tube. Rate coefficients have been determined for reactions between C 16 H n1 (n 5 9, 10, 11) and H 2 , CO, H 2 O, and NH 3 molecules as well as H, O, and N atoms. These
Valéry Le Page, Yeghis Keheyan, Theodore P Snow, Veronica M Bierbaum   +3 more
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The Cool Phase of the Interstellar Medium: Atomic Gas

1990
The purpose of this review is to discuss high resolution Hi observations of a sample of nearby galaxies and to explain what they can teach us about the composition, structure and energy balance of the Interstellar Medium or ISM. The first part presents a summary of what is known about the ISM of the Galaxy and is followed by an overview of the current ...
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Compression Disturbances in the Atomic Zone of Photodissociation Regions of Interstellar Gas

Bulletin of the Lebedev Physics Institute, 2022
D. S. Riashchikov, I. A. Pomelnikov, N. E. Molevich   +2 more
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Theoretical investigation on reactions involving electronically-excited atoms occurring in the gas phase of extraterrestrial environments and at the surface of interstellar icy grains

Over the last decade, there has been an important advance in the comprehension of the formation and destruction routes of the most common interstellar chemical species. However, a significant lack of knowledge concerning the chemistry of other minor species is still present, often due to the limited amount of computational and experimental data.
Andrea Giustini, Nadia Balucani, Marzio Rosi, Gabriella Di Genova   +3 more
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The Cold Interstellar Medium of Galaxies in the Local Universe

Annual Review of Astronomy and Astrophysics, 2022
Amelie Saintonge, Barbara Catinella
exaly