Analysis of ultraviolet spectrophotometric data from Copernicus. Final report

Technical Report · Tue Apr 17 04:00:00 EST 1979

OSTI ID:5730840

Snow, Jr, T P

Ultraviolet spectral data from the OAO 3 satellite are being used to study interstellar absorption lines and stellar and circumstellar lines in hot stars. The interstellar data are beneficial in analyzing the depletions of heavy elements from the gas phase and in elucidating how these depletions depend on physical conditions. Abundances in separate velocity components were determined from line profiles. Observations were carried out for interstellar abundances, both atomic and molecular, towards a number of stars. The better quality data are being analyzed for profile information and the lesser data are being used in curve-of-growth analyses. Molecular observations were carried out as well; N/sup 2/ was sought, interstellar C/sup 2/ was detected and its rotational excitation utilized to establish limits in interstellar cloud temperatures. An extensive search for H/sup 2/O resulted in a tentative identification which will produce new information on chemical reaction rates. Interstellar depletions and grain properties in the rho Ophiuchi cloud, stellar wind variability, and circumstellar lines are also under study.

• Research Organization: Colorado Univ., Boulder (USA). Lab. for Atmospheric and Space Physics
• OSTI ID: 5730840
• Report Number(s): N-79-20942
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ABUNDANCE
ASTRONOMY
ATMOSPHERES
CARBON
CHEMICAL COMPOSITION
COSMIC GASES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
GASES
HYDROGEN COMPOUNDS
INTERSTELLAR SPACE
MASS
NITROGEN
NONMETALS
OXYGEN COMPOUNDS
SATELLITES
SPACE
SPECTRA
SPECTROPHOTOMETRY
STARS
STELLAR ATMOSPHERES
STELLAR WINDS
ULTRAVIOLET SPECTRA
WATER