Results 161 to 170 of about 1,217 (186)

Absorption Lines from Intermediate-Latitude Interstellar Complexes

Publications of the Astronomical Society of the Pacific, 1966
Recent observations of the 21 cm emission line of hydrogen ( Blaauw 1962) have revealed the existence of massive interstellar cloud complexes at considerable distances from the galactic plane. The region 126° < ln < 142°, -19° < bn < -7°, near the association I Persei, in particular, shows a high level of emission at velocities of -48 km/sec (feature ...
openaire   +1 more source

Determination of distances to interstellar clouds using OH absorption lines

Astrophysics, 1984
An attempt is made to determine distances to interstellar clouds by a method free of the limitations of the conventional method (using the galactic rotation curve). It is shown that the term delta, given by the square root of the ratio of the half width of the OH absorption lines to the antenna temperature, varies linearly with the distance R to the ...
I. G. Kolesnik, L. V. Yurevich
openaire   +1 more source

A Discussion on astronomy in the ultraviolet - Interstellar molecular absorption lines

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1975
Abstract The ultraviolet absorption lines produced in interstellar clouds through the absorption of radiation from early type stars by molecular hydrogen H2 may be analysed to yield the particle densities and ultraviolet fluxes in the absorbing regions and the absorption by HD may be analysed to determine the proton densities and the ...
openaire   +1 more source

Line Absorption Studies of the Interstellar Gas Near 10¹⁵ Hz

Symposium - International Astronomical Union, 1974
The Copernicus satellite now opens up the ultraviolet region for inspection, and the number of resonance lines which may be studied has increased from 6, seen in the visible, to more than 30. The distribution and properties of an important constituent of the interstellar gas, molecular hydrogen, can be studied in detail using this instrument.
openaire   +1 more source

Detection of PAH Absorption and Determination of the Mid-infrared Diffuse Interstellar Extinction Curve from the Sight Line toward Cyg OB2-12

Astrophysical Journal, 2020
Brandon Hensley, Bruce Draine
exaly  

INTERSTELLAR ABUNDANCES FROM ABSORPTION-LINE OBSERVATIONS WITH THEHUBBLE SPACE TELESCOPE

Annual Review of Astronomy and Astrophysics, 1996
Blair Savage, Kenneth R Sembach
exaly  

Interstellar Absorption Lines

2004
openaire   +1 more source

New aspects of absorption line formation in intervening turbulent clouds -- II. Monte Carlo simulation of interstellar H+D Ly  absorption profiles

Monthly Notices of the Royal Astronomical Society, 1997
Igor Mazets, W H Kegel, S A Levshakov
exaly  

Interstellar Gas-phase Element Depletions in the Small Magellanic Cloud: A Guide to Correcting for Dust in QSO Absorption Line Systems∗

Astrophysical Journal, 2017
Edward Jenkins, George Wallerstein
exaly  

INTERSTELLAR H I AND H2IN THE MAGELLANIC CLOUDS: AN EXPANDED SAMPLE BASED ON ULTRAVIOLET ABSORPTION-LINE DATA

Astrophysical Journal, 2012
Daniel Welty, Tony Wong
exaly