Results 1 to 10 of about 34,658 (198)

Dust evolution, a global view: III. Core/mantle grains, organic nano-globules, comets and surface chemistry [PDF]

open access: yesRoyal Society Open Science, 2016
Within the framework of The Heterogeneous dust Evolution Model for Interstellar Solids (THEMIS), this work explores the surface processes and chemistry relating to core/mantle interstellar and cometary grain structures and their influence on the nature ...
A. P. Jones
doaj   +1 more source

Molecular Hydrogen and its Proxies HCO+ and CO in the Diffuse Interstellar Medium

open access: yesThe Astrophysical Journal, 2023
There is a robust polyatomic chemistry in diffuse, partially molecular interstellar gas that is readily accessible in absorption at radio/millimeter/submillimeter wavelengths.
Harvey Liszt, Maryvonne Gerin
doaj   +1 more source

The Effect of Star Formation on the Redshift Evolution of Interstellar Metals, Atomic and Molecular Gas in Galaxies [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2012
accepted for publication in MNRAS, slightly revised in the text according to the referee's comments, 16 pages, 10 ...
Fu, J., Kauffmann, G., Li, C., Guo, Q.
openaire   +4 more sources

A Model for Atomic and Molecular Interstellar Gas: The Meudon PDR Code [PDF]

open access: yesThe Astrophysical Journal Supplement Series, 2006
We present the revised ``Meudon'' model of Photon Dominated Region (PDR code), presently available on the web under the Gnu Public Licence at: http://aristote.obspm.fr/MIS. General organisation of the code is described down to a level that should allow most observers to use it as an interpretation tool with minimal help from our part.
Le Petit, Franck   +3 more
openaire   +3 more sources

Mapping the Multiphase Structure of H i in the Low-latitude Intermediate-velocity Arch 1

open access: yesThe Astrophysical Journal, 2023
We have analyzed the thermal and turbulent properties of the low-latitude intermediate-velocity Arch 1 (LLIV1). This was accomplished using archival H i emission and absorption data from two 21 cm line surveys: GHIGLS at 9.′4 resolution and DHIGLS at $1^{
Luka Vujeva   +3 more
doaj   +1 more source

Thermal Phases of the Neutral Atomic Interstellar Medium from Solar Metallicity to Primordial Gas [PDF]

open access: yesThe Astrophysical Journal, 2019
Abstract We study the thermal structure of the neutral atomic (H i) interstellar medium across a wide range of metallicities, from supersolar down to vanishing metallicity, and for varying UV intensities and cosmic-ray (CR) ionization rates.
Shmuel Bialy, Amiel Sternberg
openaire   +3 more sources

FAST Discovery of a Fast Neutral Hydrogen Outflow

open access: yesThe Astrophysical Journal Letters, 2023
In this letter, we report the discovery of a fast neutral hydrogen outflow in SDSS J145239.38+062738.0, a merging radio galaxy containing an optical type I active galactic nucleus (AGN).
Renzhi Su   +11 more
doaj   +1 more source

DIFFUSE ATOMIC AND MOLECULAR GAS IN THE INTERSTELLAR MEDIUM OF M82 TOWARD SN 2014J [PDF]

open access: yesThe Astrophysical Journal, 2015
We present a comprehensive analysis of interstellar absorption lines seen in moderately-high resolution, high signal-to-noise ratio optical spectra of SN 2014J in M82. Our observations were acquired over the course of six nights, covering the period from ~6 days before to ~30 days after the supernova reached its maximum B-band brightness.
Ritchey, Adam M.   +3 more
openaire   +2 more sources

The Distribution of Metallicities in the Local Galactic Interstellar Medium

open access: yesThe 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
doaj   +1 more source

A Reexamination of Phosphorus and Chlorine Depletions in the Diffuse Interstellar Medium

open access: yesThe 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
doaj   +1 more source

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