Results 41 to 50 of about 823,745 (291)
The Turbulent Interstellar Medium [PDF]
, 2006 An overview is presented of the main properties of the interstellar medium. Evidence is summarized that the interstellar medium is highly turbulent, driven on different length scales by various energetic processes.
Andreas Burkert +73 more
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Large Interstellar Polarisation Survey, II : UV/optical study of cloud-to-cloud variations of dust in the diffuse ISM [PDF]
, 2018 It is well known that the dust properties of the diffuse interstellar medium exhibit variations towards different sight-lines on a large scale. We have investigated the variability of the dust characteristics on a small scale, and from cloud-to-cloud. We
Bagnulo, S +5 more
core +2 more sources
Measuring the fractal structure of interstellar clouds [PDF]
Symposium - International Astronomical Union, 1991 To study the structure of interstellar clouds we used the so-called perimeter-area relation to estimate fractal dimensions. We studied the reliability of the method by applying it to artificial fractals and discuss some of the problems and pitfalls. Results for two different cloud types (high-velocity clouds (HVCs) and infrared cirrus) are summarized ...
Bp Wakker, Martinus Vogelaar, Uj Schwarz
openaire +3 more sources
Clouds in the interstellar medium [PDF]
Nature, 1980 Giant Molecular Clouds in the Galaxy. Edited by P. M. Solomon and M. G. Edmunds. Pp. 300. (Pergamon: 1980.) £18, $41.
openaire +2 more sources
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 photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks [PDF]
, 2009 Aims. Photodissociation by UV light is an important destruction mechanism for carbon monoxide (CO) in many astrophysical environments, ranging from interstellar clouds to protoplanetary disks. The aim of this work is to gain a better understanding of the
R. Visser +4 more
semanticscholar +1 more source
High-resolution Observations of H i in the IC 63 Reflection Nebula
The Astronomical Journal, 2023 Photodissociation regions (PDRs), where the (far-)ultraviolet light from hot young stars interact with the gas in surrounding molecular clouds, provide laboratories for understanding the nature and role of feedback by star formation on the interstellar ...
Lars Bonne +9 more
doaj +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
The Nitrogen Chemistry in Interstellar Clouds [PDF]
Symposium - International Astronomical Union, 1987 Our time dependent model of chemistry of dense interstellar clouds has been extended to study the formation of nitrogen bearing molecules. Here we present results for the calculations, under a variety of density, temperature, and elemental conditions, of the abundances of the following observationally important species: CN, HCN, HNC, NH3, NO, and N2H.
Thomas E. Graedel, William D. Langer
openaire +2 more sources
FORMATION OF SMALL-SCALE STRUCTURES IN THEINTERSTELLAR MEDIUM
Odessa Astronomical Publications, 2008 We consider formation of small scale structures in the process of interstellar cloud destruction by shock waves. We calculate statistical properties of HI column densities, optical depth and brightness temperature in 21 cm line.
E. E. Matvienko +2 more
doaj +1 more source