Results 11 to 20 of about 52,443 (248)

Matrix Isolation and Solvation of the Benzonitrile Radical Anion [PDF]

open access: yesChemistry – A European Journal, Volume 31, Issue 35, June 23, 2025.
Hydrated electrons are potent reducing agents that may play significant roles in chemical evolution within astrochemical and prebiotic environments. Benzonitrile, a molecule present in the interstellar medium (ISM), can capture electrons in amorphous water ice at cryogenic temperatures, forming a radical anion.
Shubhra Sarkar   +2 more
wiley   +2 more sources

Large Interstellar Polarisation Survey II. UV/optical study of cloud-to-cloud variations of dust in the diffuse ISM [PDF]

open access: yes, 2017
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   +4 more sources

CaFe interstellar clouds* [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2007
A new kind of interstellar cloud is proposed. These are rare (just a few examples among ∼300 lines of sight) objects with the Ca I 4227-A, Fe I 3720-A and 3860-A lines stronger than those of K I (near 7699 A) and Na I (near 3302 A). We propose the name ‘CaFe’ for these clouds.
Jacek Krełowski   +5 more
openaire   +2 more sources

Dust in the Local Interstellar Wind [PDF]

open access: yes, 1999
The gas-to-dust mass ratios found for interstellar dust within the Solar System, versus values determined astronomically for the cloud around the Solar System, suggest that large and small interstellar grains have separate histories, and that large ...
Dorschner, J. M.   +15 more
core   +2 more sources

Interstellar cloud collisions [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1985
On decrit les resultats d'une simulation numerique en 3 dimensions de nuages interstellaires isothermes en l'absence de champs magnetiques. Les collisions, en general, ne donnent pas naissance a un ou plusieurs nuages.
H. Pongracic   +3 more
openaire   +2 more sources

Turbulence in Interstellar Clouds [PDF]

open access: yesInternational 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   +2 more sources

The galactic environment of the Sun [PDF]

open access: yes, 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

FORMATION OF SMALL-SCALE STRUCTURES IN THEINTERSTELLAR MEDIUM

open access: yesOdessa 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

Dissociative Recombination of Rotationally Cold OH+ and Its Implications for the Cosmic Ray Ionization Rate in Diffuse Clouds

open access: yesThe 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

Evidence for the naphthalene cation in a region of the interstellar medium with anomalous microwave emission [PDF]

open access: yes, 2008
We report high resolution spectroscopy of the moderately reddened (A$_V$=3) early type star Cernis 52 located in a region of the Perseus molecular cloud complex with anomalous microwave emission.
A. Manchado   +24 more
core   +3 more sources

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