Results 111 to 120 of about 877,168 (238)
Warm Breeze from the starboard bow: a new population of neutral helium in the heliosphere
, 2014 We investigate the signals from neutral He atoms observed from Earth orbit in 2010 by IBEX. The full He signal observed during the 2010 observation season can be explained as a superposition of pristine neutral interstellar He gas and an additional ...
Alexashov, D. B. +11 more
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Anomalous Neutral Hydrogen Column Densities in Local Interstellar Medium Clouds
The Astrophysical JournalAnalysis of high-resolution spectra of the hydrogen and deuterium Ly α lines provides measurements of interstellar neutral hydrogen column densities N (H i ) to 113 stars within 50 pc of the Sun. Plots of N (H i ) versus distance through the LIC, G, Mic,
Jeffrey L. Linsky, Seth Redfield
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Monthly Notices of the Royal Astronomical Society, 1969 M. V. Penston +3 more
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Diffuse interstellar clouds associated with dark clouds
The Astrophysical Journal, 1982 Measurements of CH emission at 9 cm toward the bright stars ..cap alpha.. Cam and kappa Cas and from dark clouds near the stars reveal an association between diffuse clouds and dark clouds. Here the term diffuse clouds refers to clouds seen in optical absorption; the term dark clouds refers to opaque regions on the Palomar Sky Survey observed through ...
S. R. Federman, R. F. Willson
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On the Abiotic Origin of Dimethyl Sulfide: Discovery of Dimethyl Sulfide in the Interstellar Medium
The Astrophysical Journal LettersFollowing the discovery of dimethyl sulfide (DMS; CH _3 SCH _3 ) signatures in comet 67P/Churyumov–Gerasimenko, we report the first detection of this organosulfur species in the interstellar medium during the exploration of an ultradeep molecular line ...
Miguel Sanz-Novo +16 more
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Chemistry in Dense Molecular Clouds: Theory and Observational Constraints [PDF]
, 1988 For the most part, gas phase models of the chemistry of dense molecular clouds predict the abundances of simple species rather well. However, for larger molecules and even for small systems rich in carbon these models often fail spectacularly.
Blake, Geoffrey A.
core
The early evolution of the solar system [PDF]
The problems of relating collapse conditions in an interstellar cloud to a model of the primitive solar nebula are discussed. In such a nebula there is a radial force balance between gravity, the pressure gradient, and centrifugal forces due to the ...
Cameron, A. G. W.
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The Astrophysical JournalAccurate interpretation of observations relies on the interstellar dust extinction law, which also serves as a powerful diagnostic for probing dust properties.
Juan Deng +3 more
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Physical-chemical processes in a protoplanetary cloud [PDF]
Physical-chemical processes in a protoplanetary cloud are discussed. The following subject areas are covered: (1) characteristics of the chemical composition of molecular interstellar clouds; (2) properties and physico-chemical process in the genesis of ...
Lavrukhina, Avgusta K.
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The Astrophysical JournalThe B2 star Epsilon Canis Majoris ( ϵ CMa), at parallax distance d = 124 ± 2 pc, dominates the H i photoionization of the Local Interstellar Cloud. At its closer parallax distance compared to previous estimates, ϵ CMa has a 0.9 mag fainter absolute ...
J. Michael Shull +2 more
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