Results 41 to 50 of about 52,443 (248)

The Nitrogen Chemistry in Interstellar Clouds [PDF]

Symposium - International Astronomical Union, 1987
Our time dependent model of chemistry of dense interstellar clouds has been extended to study the formation of nitrogen bearing molecules. Here we present results for the calculations, under a variety of density, temperature, and elemental conditions, of the abundances of the following observationally important species: CN, HCN, HNC, NH3, NO, and N2H.
Thomas E. Graedel, William D. Langer
openaire   +2 more sources

The Flattest Infrared Extinction Curve in Four Isolated Dense Molecular Cloud Cores

The Astrophysical Journal Letters
The extinction curve of interstellar dust in the dense molecular cloud cores is crucial for understanding dust properties, particularly size distribution and composition.
Jun Li, Bingqiu Chen, Biwei Jiang, He Zhao, Botao Jiang, Xi Chen   +5 more
doaj   +1 more source

INTERSTELLAR CLOUDS BY SEARCHLIGHT [PDF]

The 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

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, EarlyView.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Photodissociation of OH in Interstellar Clouds

The Astrophysical Journal, 1984
Calculations are presented of the lifetime of OH against photodissociation by the interstellar radiation field as a function of depth into interstellar clouds containing grains of various scattering properties. The effectiveness of the different photodissociation channels changes with depth into a cloud. Absorption into the repulsive - state is usually
Dishoeck, E.F. van, Dalgarno, A.
openaire   +4 more sources

The Influence of Stellar Wind Variability on Measurements of Interstellar O VI Along Sightlines to Early-Type Stars [PDF]

, 2001
A primary goal of the FUSE mission is to understand the origin of the O VI ion in the interstellar medium of the Galaxy and the Magellanic Clouds. Along sightlines to OB-type stars, these interstellar components are usually blended with O VI stellar wind
A. W. Fullerton, D. L. Massa, E. B. Jenkins, Howarth I. D., K. R. Sembach, N. Lehner, Prinja R. K.   +6 more
core   +1 more source

Observations of Multiphase, High-velocity, Shocked Gas in the Vela Supernova Remnant

The Astrophysical Journal, 2023
We present an analysis of high-resolution far-UV archival spectra obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope of the star HD 75309, which probes high-velocity shocked gas in the Vela supernova remnant (SNR).
Adam M. Ritchey
doaj   +1 more source

Time-variability in the Interstellar Boundary Conditions of the Heliosphere: Effect of the Solar Journey on the Galactic Cosmic Ray Flux at Earth

, 2011
During the solar journey through galactic space, variations in the physical properties of the surrounding interstellar medium (ISM) modify the heliosphere and modulate the flux of galactic cosmic rays (GCR) at the surface of the Earth, with consequences ...
A. Yeghikyan, B. Wolff, B.E. Wood, C. Heiles, C.P. Sonett, D.M. Meyer, E. Möbius, G. Hebrard, G.P. Zank, H. Müller, H. Müller, H.-R. Müller, Hans-Reinhard Mueller, I.G. Usoskin, J. Goldston Peek, J. Kirkby, J.D. Slavin, J.T. Gosling, K.G. McCracken, K.G. McCracken, L.A. Fisk, M. Salvati, M. Wolleben, M.A.C. Perryman, N.V. Pogorelov, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, Priscilla C. Frisch, R. Lallement, R. Muscheler, R. Schönrich, R.A. Leske, R.A. Leske, R.A. Mewaldt, R.C. Bohlin, S. Redfield, S. Redfield, S. Redfield, S. Stanimirović, T.E. Holzer, U. Haud, V. Florinski, V. Florinski, W.R. Webber   +48 more
core   +1 more source

A search for naphthalene in diffuse interstellar clouds [PDF]

Monthly Notices of the Royal Astronomical Society, 2012
Accepted for publication in ...
Arturo Manchado, Arturo Manchado, Jonay I. González Hernández, Jonay I. González Hernández, Susana Iglesias-Groth, Susana Iglesias-Groth   +5 more
openaire   +3 more sources

Structure Identification of CO Monolayer on Ag(111) Using Atomic Force Microscopy

Advanced Materials Interfaces, Volume 12, Issue 10, May 19, 2025.
Physisorption systems of CO molecules on metal surfaces have long been studied. Nondestructive analysis of weakly adsorbed systems on surfaces still remains a challenging task. In this study, the structure of the CO monolayer is successfully determined by directly visualizing individual CO molecules using atomic force microscopy (AFM).
Mitsuo Kimura, Yuji Kunisada, Yoshiaki Sugimoto   +2 more
wiley   +1 more source