Results 21 to 30 of about 889,569 (256)
Creating a new paradigm for the local interstellar medium–A perspective
Frontiers in Astronomy and Space Sciences, 2023 The interstellar medium close to the Sun called the local ISM (LISM) provides critical insights into physical processes and phenomena in the more distant interstellar medium in our Galaxy without the confusion of many complex structures in the sight ...
Jeffrey L. Linsky, Seth Redfield
doaj +1 more source
Jeans instability of interstellar gas clouds in the background of weakly interacting massive particles [PDF]
, 1998 Criterion of the Jeans instability of interstellar gas clouds which are gravitationally coupled with weakly interacting massive particles is revisited. It is established that presence of the dark matter always reduces the Jeans length, and in turn, Jeans
David Tsiklauri, Tsiklauri D., Usami M.
core +2 more sources
Interstellar hydrocarbons: degradation chemistry in diffuse clouds [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Observations of diffuse clouds showed that they contain a number of simple hydrocarbons [e.g. CH, C2H, (l- and c-)C3H2, and C4H] in abundances that may be difficult to understand on the basis of conventional gas-phase chemical models.
Zainab Awad, Serena Viti
openaire +4 more sources
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
doaj +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
Turbulence in Interstellar Clouds [PDF]
International Astronomical Union Colloquium, 1989 Above masses of the order of lOO M⊙, molecular clouds have masses and sizes which scale like those of self-gravitating polytropes bounded by an external pervading pressure. It is unlikely that this scaling is due to mere observational bias. But the physics underlying this behaviour is far from being understood.
openaire +1 more source
despotic – a new software library to Derive the Energetics and SPectra of Optically Thick Interstellar Clouds [PDF]
, 2013 I describe DESPOTIC, a code to Derive the Energetics and SPectra of Optically Thick Interstellar Clouds. DESPOTIC represents such clouds using a one-zone model, and can calculate line luminosities, line cooling rates, and in restricted cases line ...
M. Krumholz
semanticscholar +1 more source
The Astrophysical Journal Letters, 2023 Observations of OH ^+ are used to infer the interstellar cosmic ray ionization rate in diffuse atomic clouds, thereby constraining the propagation of cosmic rays through and the shielding by interstellar clouds, as well as the low energy cosmic ray ...
Ábel Kálosi +14 more
doaj +1 more source
A UNIFIED MICROSCOPIC–MACROSCOPIC MONTE CARLO SIMULATION OF GAS-GRAIN CHEMISTRY IN COLD DENSE INTERSTELLAR CLOUDS [PDF]
, 2012 For the first time, we report a unified microscopic–macroscopic Monte Carlo simulation of gas-grain chemistry in cold interstellar clouds in which both the gas-phase and the grain-surface chemistry are simulated by a stochastic technique.
Q. Chang, E. Herbst
semanticscholar +1 more source
The Distance to High-velocity Cloud Complex M
The Astrophysical Journal, 2023 λ -21 cm HI4PI survey data are used to study the anomalous-velocity hydrogen gas associated with high-velocity cloud Complex M. These high-sensitivity, high-resolution, high-dynamic-range data show that many of the individual features, including MI, MIIa,
G. L. Verschuur, J. T. Schmelz
doaj +1 more source