Analysis of the IRAS low-resolution spectra. Environmental research papers

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:5454251

Little-Marenin, I

Analysis of the IRAS low resolution spectra shows that the 8-22 micron spectral range shows a variety of emission features. The strongest features in spectra of M stars are the 10 and 18 micron silicate emission features. In addition a three-component feature with peaks at 10, 11 and 13.1 micron and a weak, broad 9-15 micron feature is present in many M variable stars. Most carbon stars show the 11.2 micron SiC emission feature as well as, in some cases, an unidentified 8-9 micron emission feature. The MS, S and SC stars show a range of emission features whose peaks range from 10 to 11.2 micron. The excess emission above the underlying photospheric continuum in the 8-22 micron region for S Mira variables shows a sharp increase for period greater than about 370 days.

• Research Organization: Air Force Geophysics Lab., Hanscom AFB, MA (United States)
• OSTI ID: 5454251
• Report Number(s): AD-A-234482/8/XAB; GL-TR--88-0111
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CARBIDES
CARBON
CARBON COMPOUNDS
CARBON STARS
COSMIC DUST
DUSTS
ELEMENTS
EMISSION
EMISSION SPECTRA
INFRARED SPECTRA
MAIN SEQUENCE STARS
NONMETALS
OXYGEN COMPOUNDS
SATELLITES
SILICATES
SILICON CARBIDES
SILICON COMPOUNDS
SPECTRA
STARS
STELLAR ATMOSPHERES
VARIABLE STARS