Results 81 to 90 of about 476,181 (204)
When Magnetic Fields Sculpt the Sky: The Riegel–Crutcher Cloud in Optical Polarization
The Astrophysical JournalFilamentary structures are ubiquitous in the interstellar medium, yet the extent to which magnetic fields influence the morphology of cold atomic gas remains an open question.
Gabriel A. P. Franco +4 more
doaj +1 more source
Entropy Export and Chemical Reactions in Plasmas
Plasma Processes and Polymers, Volume 23, Issue 1, January 2026.In a non‐equilibrium plasma, energy is transferred to molecules by electron‐impact (1), collisions among excited molecules (2), and Joule heating (3). The entropy balance for this open system relates the energy available per molecule to changes in entropy, which determines plasma‐based gas conversion. ABSTRACT Is plasma truly a “fourth state of matter”?
Dirk Hegemann, Ramses Snoeckx
wiley +1 more source
H i Kinematics and the E(B − V)/N(H i) Ratio
The Astrophysical JournalThe λ 21 cm H i emission that is used to trace the gas-to-dust ratio at high Galactic latitudes has contributions from material beyond the Milky Way disk, with uncertain and likely subsolar metallicity and dust content.
Harvey Liszt
doaj +1 more source
Surface hydrogenation in diffuse and translucent interstellar clouds
, 2002 We investigate the effects of grain-surface hydrogenation reactions on gas phase chemical models of diffuse and translucent clouds in the interstellar medium.
S. Viti, P. T. O'neill, D. A. Williams
core +1 more source
A Definitive Determination of the Interstellar Carbon Abundance toward ρ Ophiuchi A and B
The Astrophysical Journal LettersWe present the results of an effort to derive interstellar gas-phase C ii abundances along the lines of sight toward ρ Oph A and B. Our analysis is based on high-resolution near-ultraviolet and far-ultraviolet archival spectra acquired with the Space ...
Adam M. Ritchey +3 more
doaj +1 more source
Unusual relative strengths of the diffuse interstellar bands in some interstellar dust clouds [PDF]
, 1986 Some of the diffuse interstellar features (DIBs) in the spectra of certain stars at high galactic latitudes (1 is greater than 15 degrees) are unusually weak or absent while others have the strength expected for their color excess.
Walker, G. A. H., Krelowski, J.
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Enigma of H 3 + in Diffuse Interstellar Clouds [PDF]
, 2003 H 3 + is of fundamental importance to interstellar chemistry both because it is a hydrogenic species (and >9O% of all nuclei in the universe are hydrogen nuclei; see Fig. 1) and because it serves as the universal protonator, initiating a chain of ion-neutral reactions that is responsible for the formation of most interstellar molecules.
Benjamin J. McCall, Takeshi Oka
openaire +1 more source
Interstellar Migration, the Population ‘Problem’ and the Climate Emergency
Critical Quarterly, Volume 68, Issue 1, Page 103-119, April 2026.
Anna Hartnell
wiley +1 more source
Silicate Extinction Profile Based on the Stellar Spectrum by Spitzer/IRS
The Astrophysical JournalThe 9.7 and 18 μ m interstellar spectral features, arising from the Si–O stretching and O–Si–O bending modes of amorphous silicate dust, are the strongest extinction features in the infrared.
Zhenzhen Shao, Biwei Jiang
doaj +1 more source
Simulating molecular cloud regulated star formation in Galaxies [PDF]
, 2007 This thesis is primarily concerned with understanding the process of galaxy formation via the simulation of the interstellar medium, star formation and supernova feedback.
Booth, Craig Martin
core