Distribution of hot stars and hydrogen in the Large Magellanic Cloud

Journal Article · Tue Sep 15 04:00:00 EDT 1981 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159221· OSTI ID:5840536

Page, T; Carruthers, G R

Imagery of the Large Magellanic Cloud, in the wavelengh ranges 1050--1600 and 1250--1600 A, was obtained by the S201 far ultraviolet camera during the Apollo 16 mission in 1972 April. These images have been reduced to absolute far-UV intensity distributions over the area of the LMC, with 3'-5' angular resolution. Comparison of our far-UV measurements in the LMC with H..cap alpha.. and 21 cm surveys reveals that interstellar hydrogen in the LMC is often concentrated in 100 pc clouds within the 500 pc clouds detected by McGee and Milton. Furthermore, at least 25 associations of O and B stars in the LMC are outside the interstellar hydrogen clouds; four of them appear to be on the far side. Far-UV and mid-UV spectra were obtained of stars in 12 of these associations, using the International Ultraviolet Explorer (IUE). Equivalent widths of L..cap alpha.. and six other lines, and relative intensities of the continuum at seven wavelengths from 1300 to 2900 A, have been measured and are discussed.

• Research Organization: NASA Johnson Space Center
• OSTI ID: 5840536
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 248:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
BRIGHTNESS
CHEMICAL COMPOSITION
CHEMISTRY
COSMOCHEMISTRY
DATA ANALYSIS
DISTRIBUTION
ELEMENTS
GALAXIES
HYDROGEN
IMAGES
INTERSTELLAR SPACE
MAGELLANIC CLOUDS
MAIN SEQUENCE STARS
NONMETALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SPACE
SPATIAL DISTRIBUTION
SPECTRA
STARS
ULTRAVIOLET SPECTRA