Results 91 to 100 of about 219,513 (216)

On the Genetic Relation Between Interstellar Clouds and Dust Clouds [PDF]

open access: yesSymposium - International Astronomical Union, 1973
We propose that many of the denser dust clouds represent transient stages between the initiation of gravitational collapse of ordinary interstellar clouds by passage through a spiral galactic shock and the appearance of a stellar association. The interstellar gas is not processed at too rapid a rate (1) because the time spent between galactic shocks is
openaire   +1 more source

Atomic and Molecular Gas in the Milky Way. I. Structure Decomposition

open access: yesThe Astrophysical Journal
We present GDCluster, a fully automated algorithm for decomposing a spectral-line data cube of interstellar gas into coherent structures. Assuming a multi-Gaussian nature of observed spectra, GDCluster employs and augments the derivative spectroscopy ...
Xin Liu, Fujun Du
doaj   +1 more source

Observations of molecules in diffuse interstellar clouds

open access: yes, 1993
We present results from observations of diffuse interstellar clouds, with discussion of their significance and including a historical survey to put the recent work into perspective.
Somerville, W.B., Crawford, Ian
core   +1 more source

INTERSTELLAR CLOUDS BY SEARCHLIGHT

open access: yesThe Astronomical Journal, 2009
Interpretation of high-resolution observations of absorption by interstellar clouds of radiation from extragalactic sources should include the effect of the Earth's motion with respect to the source. High-resolution H I absorption profiles that are not heavily blended have been published for eight sources.
openaire   +1 more source

The Chemistry of Cold, Dark Interstellar Clouds [PDF]

open access: yesSymposium - International Astronomical Union, 1987
In recent years the nearby cold, dark clouds have been shown to possess a rich chemistry, with interesting differences with respect to warmer massive-star-forming regions and also among the cold clouds themselves. 39 molecular species are now known in these regions.
openaire   +2 more sources

Alfvén Waves in Dusty Interstellar Clouds

open access: yes, 1997
Dust particles in a plasma can be higWy charged, and can carry a proportion of the negative charge of the plasma. Even if this proportion is quite small, as in interstellar dusty clouds, it can have a large effect on hydromagnetic Alfvén waves ...
S. V. Vladimirov, N. F. Cramer
core   +1 more source

Optical interstellar lines in dark clouds. [PDF]

open access: yesThe Astrophysical Journal, 1973
<p>Published - <a href="/records/nj8w2-gpn05/files/1973ApJ___186__149C.pdf?download=1">1973ApJ___186__149C.pdf</a></p>
openaire   +2 more sources

Grains charges in interstellar clouds [PDF]

open access: yes, 1989
The charge of cosmic grains could play an important role in many astrophysical phenomena. It probably has an influence on the coagulation of grains and more generally on grain-grain collisions, and on interaction between charged particles and grains ...
Bel, N., Viala, Y. P., Lafon, J. P.
core  

Organic Chemistry in the H2-bearing, CO-rich Interstellar Ice Layer at Temperatures Relevant to Dense Cloud Interiors

open access: yesThe Astrophysical Journal
Ice chemistry in the dense, cold interstellar medium (ISM) is probably responsible for the formation of interstellar complex organic molecules (COMs). Recent laboratory experiments performed at T ∼ 4 K have shown that irradiation of CO:N _2 ice samples ...
Rafael Martín-Doménech   +3 more
doaj   +1 more source

Multi-phase interstellar clouds in the Vela SNR resolved with XMM-Newton

open access: yes, 2005
XMM-Newton spatial/spectral resolution and high effective area allow to deepen our knowledge about the shocks in Supernova Remnants and their interaction with the interstellar medium.
Maggio, A.   +3 more
core   +1 more source

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