Results 51 to 60 of about 49,075 (253)
Interstellar processes: Ortho/para conversion, radiative association, and dissociative recombination
EPJ Web of Conferences, 2015 The study of the ortho-to-para ratio of assorted gas-phase interstellar molecules such as H2, H2O, NH3, and H2O+ has gained interest in recent years, based partially on new spectral observations of light hydrides by the Herschel Space Observatory ...
Herbst Eric
doaj +1 more source
The galactic environment of the Sun [PDF]
, 1999 The interstellar cloud surrounding the solar system regulates the galactic environment of the Sun and constrains the physical characteristics of the interplanetary medium.
Frisch, P. C.
core +3 more sources
Shaken or Stirred: The Diffuse Interstellar Medium with Exceptionally High SiO Abundance
The Astrophysical Journal, 2023 Interstellar shocks, a key element of stellar feedback processes, shape the structure of the interstellar medium (ISM) and are essential for the chemistry, thermodynamics, and kinematics of interstellar gas.
Daniel R. Rybarczyk +2 more
doaj +1 more source
Diffuse interstellar bands and cloud density [PDF]
Monthly Notices of the Royal Astronomical Society, 1988 Il est demontre que les forces des caracteristiques d'absorption a λλ4430 et 5780 sont independantes des quantites en relation a la densite des nuages interstellaires. Il est demontre que des resultats anterieurs qui suggeraient de telles relations sont errones suite a l'omission de valeurs non nulles a E(B-V)=0 dans les analyses de ...
openaire +1 more source
THE CHEMISTRY OF INTERSTELLAR ARGONIUM AND OTHER PROBES OF THE MOLECULAR FRACTION IN DIFFUSE CLOUDS [PDF]
, 2016 We present a general parameter study in which the abundance of interstellar argonium (ArH+) is predicted using a model for the physics and chemistry of diffuse interstellar gas clouds.
D. Neufeld, M. Wolfire
semanticscholar +1 more source
C$^+$ detection of warm dark gas in diffuse clouds [PDF]
, 2010 We present the first results of the Herschel open time key program, Galactic Observations of Terahertz C$^+$ (GOT C+) survey of the [CII] fine-structure line at 1.9 THz (158 microns) using the HIFI instrument on Herschel.
Abdo +30 more
core +1 more source
On the evolution of diffuse interstellar clouds [PDF]
Monthly Notices of the Royal Astronomical Society, 1992 We have computed models of a diffuse interstellar cloud which illustrate the progression from largely atomic to molecular gas with increasing optical depth. The medium is assumed to evolve isobarically, and the time-dependent chemistry is followed with the aid of a library of about 500 reactions.
E. L. Heck +4 more
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Molecular Hydrogen in Diffuse Interstellar Clouds of Arbitrary Three-dimensional Geometry [PDF]
, 1997 We have constructed three-dimensional models for the equilibrium abundance of molecular hydrogen in diffuse interstellar clouds of arbitrary geometry that are illuminated by ultraviolet radiation.
M. Spaans, D. Neufeld
semanticscholar +1 more source
The chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds
, 2005 We present a theoretical investigation of the chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds. The chemistry of interstellar fluorine is qualitatively different from that of any other element, because - unlike the ...
Neufeld, David A. +2 more
core +1 more source
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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