Three micron ice-band features in the ρ Ophiuchi sources

• Published in: The Astrophysical journal Vol. 352; no. 2; pp. 724 - 730
• Main Authors: TANAKA, M, SATO, S, NAGATA, T, YAMAMOTO, T
• Format: Journal Article
• Language: English
• Published: Chicago, IL University of Chicago Press 01.04.1990
• Subjects: 640105 > Astrophysics & Cosmology > Galaxies; ABSORPTION SPECTRA; Astronomy; CHEMICAL COMPOSITION; CHEMISTRY; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC GASES; COSMOCHEMISTRY; Earth, ocean, space; EMISSION SPECTRA; Exact sciences and technology; FLUIDS; GASES; GIANT STARS; ICE; INFRARED SPECTRA; Interstellar medium (ism) and nebulae in milky way; INTERSTELLAR SPACE; Molecular clouds, h2 clouds, dense clouds, and dark clouds; PROTOSTARS; SPACE; SPECTRA 640102 > Astrophysics & Cosmology > Stars & Quasi-Stellar, Radio & X-Ray Sources; STARS; Stellar systems. Galactic and extragalactic objects and systems. The universe; Absorption line; Premain sequence star; Spectral line profile; Ice; Dark cloud; Optical thickness; Infrared spectrum; Interstellar grain; Spectroscopical observation
• ISSN: 0004-637X; 1538-4357
• DOI: 10.1086/168574

Low-resolution spectra in the 2.4-3.8 micron range are presented for 31 sources in the Rho Oph dark cloud. The characteristics of the 3-micron spectra for protostars, emission-line stars, associated early-type stars, and background M giant stars are examined. Consideration is given to the relationship between ice-band absorption and H-K magnitude. The results show the existence of ice-mantled grains in the circumstellar disks of emission-line stars. The processes controling the formation of H2O ice in dark clouds are discussed. 21 refs.