Results 1 to 10 of about 34,908 (184)
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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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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The Astrophysical Journal Letters, 2023 JWST observations of polycyclic aromatic hydrocarbon (PAH) emission provide some of the deepest and highest resolution views of the cold interstellar medium (ISM) in nearby galaxies.
Karin M. Sandstrom +45 more
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Ubiquitous argonium (ArH+) in the diffuse interstellar medium: A molecular tracer of almost purely atomic gas [PDF]
Astronomy & Astrophysics, 2014 We describe the assignment of a previously unidentified interstellar absorption line to ArH$^+$ and discuss its relevance in the context of hydride absorption in diffuse gas with a low H$_2$ fraction. The column densities along several lines of sight are determined and discussd in the framework of chemical models.
Schilke, P. +16 more
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Star Formation in Atomic Gas [PDF]
, 2012 Observations of nearby galaxies have firmly established, over a broad range of galactic environments and metallicities, that star formation occurs exclusively in the molecular phase of the interstellar medium (ISM).
Abdo +37 more
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VERTICO and IllustrisTNG: The Spatially Resolved Effects of Environment on Galactic Gas
The Astrophysical Journal Letters, 2023 It has been shown in previous publications that the TNG100 simulation quantitatively reproduces the observed reduction in each of the total atomic and total molecular hydrogen gas for galaxies within massive halos, i.e., dense environments.
Adam R. H. Stevens +17 more
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Atomic and molecular gas in interstellar cirrus clouds
The Astrophysical Journal, 1994 The dust, atomic gas, and molecular gas content of a sample of 26 of isolated, degree-sized infrared clouds are compared. Half of the clouds have an infrared excess indicating the presence of H2, and 14 contain compact CO-emitting regions. Complete, high angular resolution H I and CO maps of one cloud, G236+39, resolve the transition between atomic and
William T. Reach +2 more
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On the structure of the turbulent interstellar atomic hydrogen [PDF]
Astronomy & Astrophysics, 2007 Aims. It is necessary to understand the dynamics of atomic gas to use complex modeling and to carry out detailed comparisons between theoretical models and observations. Methods. In a companion paper, we present high resolution bidimensional numerical simulations of the interstellar atomic hydrogen.
Hennebelle, Patrick +2 more
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How to search for mirror stars with Gaia
Journal of High Energy Physics, 2022 We show for the first time how to conduct a direct search for dark matter using Gaia observations. Its public astrometric data may contain the signals of mirror stars, exotic compact objects made of atomic dark matter with a tiny kinetic mixing between ...
Aaron Howe +3 more
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Probing the Conditions for the H i-to-H2 Transition in the Interstellar Medium
The Astrophysical Journal, 2023 We investigate the conditions for the H i -to-H _2 transition in the solar neighborhood by analyzing H i emission and absorption measurements toward 58 Galactic lines of sight (LOSs) along with ^12 CO(1–0) (CO) and dust data. Based on the accurate column
Gyueun Park +11 more
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