Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...294..599s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 294, July 15, 1985, p. 599-614.
Astronomy and Astrophysics
Astrophysics
240
Abundance, Early Stars, Galaxies, Hydrogen Clouds, Interstellar Gas, Iue, Halos, Line Of Sight, Lyman Alpha Radiation, Stellar Color, Stellar Spectrophotometry
Scientific paper
A survey is initiated of interstellar densities, abundances, and cloud structure in the Galaxy, using the International Ultraviolet Explorer. From high-resolution (0.1-A) spectra, interstellar column densities are derived toward 244 early-type stars by fitting the damping wings of the Ly-alpha absorption line. Published B-V photometry is used to derive E(B-V) color excesses, stellar distances r, and the mean hydrogen densities, n-bar = N(H I)/r. The data set includes stars out to r = 8.5 kpc and E(B-V) = 0.86, with 68 stars in the galactic halo (absolute b greater than 20 deg). The statistical sample consists of 205 stars of type O3-B2.5 within 5 kpc (53 stars in the halo). The column densities, log N(H I), range from less than 19.44 per square centimeter for alpha Vir to 21.81 for HD 37061. A statistical analysis of the E(B-V) distribution suggests variations in the line-of-sight cloud density and the mean reddening per cloud.
Shull Michael J.
van Steenberg Michael E.
No associations
LandOfFree
Galactic interstellar abundance surveys with IUE. I - Neutral hydrogen does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Galactic interstellar abundance surveys with IUE. I - Neutral hydrogen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic interstellar abundance surveys with IUE. I - Neutral hydrogen will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1231227