Results 141 to 150 of about 668,448 (162)

Magnetic fields in dense interstellar clouds

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1981
Abstract Evidence is presented that shows that magnetic fields pervade the entire interstellar medium including interstellar gas clouds of both low and high density. The magnetic field in the ‘seed’ gas from which the denser clouds form is 0.2-0.3 nT (1T — 104G). Zeeman effect measurements of neutral hydrogen show that stronger fields
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The Molecular Composition of Dense Interstellar Clouds

1991
The dense interstellar clouds in our Milky Way Galaxy and other galaxies are the most massive molecular objects known in the Universe. Their composition and chemical evolution are, in consequence, fundamental aspects of nature whose investigation is basic to space chemistry.
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Molecular abundances in the dense interstellar and circumstellar clouds

2008
The abundances of a variety of astrophysical molecules, ranging from H2 and CO to urea and glycine, are reconsidered in the light of new astronomical and laboratory data. Emphasis is given on the sources HCL2(TMC1) and IRC+10216.
M. Guélin, J. Cernicharo
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Collisional excitation of molecules in dense interstellar clouds

Il Nuovo Cimento C, 1985
State transitions which permit the identification of the molecular species in dense interstellar clouds are reviewed, along with the techniques used to calculate the transition energies, the database on known molecular transitions and the accuracy of the values.
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The Production of Complex Molecules in Dense Interstellar Clouds

1985
The synthesis of gas phase molecules in dense interstellar clouds is discussed. Detailed models that utilize gas phase reactions to both produce and deplete smaller molecules are explained. Problems in extending gas phase, ion-molecule synthetic pathways to complex molecules are clarified and the role of radiative association processes is emphasized ...
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Molecules in Dense Interstellar Clouds

1974
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Can Negative Molecular Ions Be Detected in Dense Interstellar Clouds?

Nature, 1981
Eric Herbst
exaly  

The UV Radiation Field Within Dense Interstellar Clouds

Lecture Notes in Physics, 1988
S Aiello
exaly  

Diamonds in Dense Molecular Clouds: A Challenge to the Standard Interstellar Medium Paradigm

Science, 1993
Scott Sandford, Louis Allamandola, A G Tielens   +2 more
exaly  

Effects of Energy Deposition by Cosmic Ray Protons in Dense Interstellar Clouds

Lecture Notes in Physics, 1988
S Aiello
exaly