Results 41 to 50 of about 25,001 (219)

Centrosymmetric molecules as possible carriers of diffuse interstellar bands

, 2010
In this paper, we present new data with interstellar C2 (Phillips bands A-X), from observations made with the Ultraviolet-Visual Echelle Spectrograph of the European Southern Observatory.
Bakker, Bakker, Ballik, Ballik, Chauville, Crawford, Douay, Douglas, F. A. Musaev, Frisch, G. A. Galazutdinov, Galazutdinov, Galazutdinov, Gredel, Heger, Herbig, Herbig, Hobbs, J. Krełowski, Kaźmierczak, Kaźmierczak, Langhoff, M. Kaźmierczak, M. R. Schmidt, Maier, Marenin, Morton, Sarre, Sonnentrucker, Thorburn, Van Dishoeck, Van Dishoeck, Westerlund, Y. Betelesky, Ádámkovics   +34 more
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Estimating molecular hydrogen in diffuse interstellar clouds [PDF]

Monthly Notices of the Royal Astronomical Society, 1989
La densite de colonne de l'hydrogene moleculaire dans les nuages interstellaires diffus peut etre estimee de maniere satisfaisante par 2 methodes: a partir de la densite de colonne de l'hydrogene atomique combinee avec E(B-V); et a partir des observations optiques des molecules ...
W. B. Somerville, C. A. Smith
openaire   +1 more source

Putting the Diffuse Interstellar Bands on the map - literally!

, 2013
In a quest to further our understanding of the diffuse interstellar medium (ISM) as well as the unidentified carriers of the diffuse interstellar bands (DIBs), we are mapping DIBs across the sky using hundreds of hot stars as background torches ...
van Loon, Jacco Th.
core   +1 more source

EXCITATION OF C₂IN DIFFUSE INTERSTELLAR CLOUDS

The Astrophysical Journal, 2012
We investigate the effects and the implications of incorporating new collision and radiative rates in modeling the excitation of diatomic carbon molecule. The present results suggest that diffuse and translucent interstellar clouds may present a structure in which regions with different densities and kinetic temperatures overlap along the line of sight,
S. Casu, Cesare Cecchi-Pestellini
openaire   +2 more sources

The Smallest Sizes of Diffuse Interstellar Clouds [PDF]

International Astronomical Union Colloquium, 1984
AbstractBy observing the difference in optical depths between absorption spectra toward the two components of double sources we have measured the variations in opacity over lengths of less than 0.1 up to 10 pc inside diffuse interstellar clouds. Significant variations are detected on scales larger than about 0.2 pc, but not less. This may represent the
John M. Dickey, J. Crovisier, I. Kazes
openaire   +1 more source

Is the Sun Embedded in a Typical Interstellar Cloud?

, 2008
The physical properties and kinematics of the partially ionized interstellar material near the Sun are typical of warm diffuse clouds in the solar vicinity.
A. Czechowski, A.C. Cummings, A.C. Cummings, B. Flynn, B.D. Savage, B.E. Wood, B.E. Wood, C. Heiles, C.S. Bowyer, C.S. Weller, D.E. Welty, E. Gruen, E. Möbius, E. Salerno, E.B. Jenkins, J. Tinbergen, J. Vallerga, J.D. Slavin, J.L. Han, J.L. Linsky, J.M. Ajello, J.P. Simpson, K. Cheng, L.A. Marschall, L.M. Haffner, L.M. Haffner, M. MacLow, M. Witte, M. Wolleben, N. Lehner, N.V. Pogorelov, P. Frisch, P. Routly Jr., P.B. Lucke, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.M. Gondhalekar, Priscilla C. Frisch, R. Crutcher, R. Lallement, R. Lallement, R. Ratkiewicz, R. Shetty, R.J. Rand, R.J. Reynolds, R.J. Reynolds, S. Redfield, S. Redfield, S. Redfield, S.M. Kahn, T.F. Adams, T.J. Linde, V. Piirola, V.V. Izmodenov   +57 more
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Molecules in diffuse interstellar clouds [PDF]

, 1988
The existence of diatomic molecules in the diffuse interstellar gas has been known since the late thirties and from that time numerous observations have been made, at visible and ultraviolet wavelengths, of interstellar molecular absorption lines in the spectra of bright stars.
openaire   +1 more source

On the Stability of Interstellar Neutral Hydrogen Clouds at Large Z-heights

The Astrophysical Journal
Galactic neutral hydrogen (H i ) data drawn from several large-scale surveys have been used to study 32 small clouds found between Galactic longitudes 70° and 140° and latitudes −20° and −45°.
G. L. Verschuur
doaj   +1 more source

The cycling of carbon into and out of dust

, 2014
Observational evidence seems to indicate that the depletion of interstellar carbon into dust shows rather wide variations and that carbon undergoes rather rapid recycling in the interstellar medium (ISM).
Bocchio, Marco, Fanciullo, Lapo, Guillet, Vincent, Jones, Anthony, Jones, Anthony P., Köhler, Melanie, Micelotta, Elisabetta, Verstraete, Laurent, Ysard, Nathalie   +8 more
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Astrochemistry: overview and challenges [PDF]

, 2017
This paper provides a brief overview of the journey of molecules through the Cosmos, from local diffuse interstellar clouds and PDRs to distant galaxies, and from cold dark clouds to hot star-forming cores, protoplanetary disks, planetesimals and ...
van Dishoeck, Ewine F.
core   +3 more sources