A search for 1612 MHz OH emission from IRAS sources with silicate features

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115288· OSTI ID:7149177

Galt, J A; Kwok, S; Frankow, J ^[1]

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1. Dominion Radio Astrophysical Observatory, Penticton (Canada) Calgary Univ. (Canada)

The result of an OH survey of IRAS sources with the objective of detecting previously unknown highly evolved stars is reported. Objects selected for observations were north of declination + 20 deg, had no known catalog associations, and showed the 9.7-micron silicate feature in either emission or absorption. Of the 144 sources observed, 25 show double-peak emission characteristic of an expanding shell and an additional two sources show a single OH emission line. One IRAS source (19566 + 3423) is found to have a peculiar twin-double-peak profile suggestive of a concentric shell structure. Unlike most other sources the OH lines in this object show strong circular polarization and time variability. 32 refs.

• OSTI ID: 7149177
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 98; ISSN 0004-6256; ISSN ANJOA
• 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
COSMIC RAY SOURCES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
ENERGY SPECTRA
HYDROXYL RADICALS
IDENTIFICATION SYSTEMS
INFRARED RADIATION
OXYGEN COMPOUNDS
RADIATIONS
RADICALS
SATELLITES
SILICATES
SILICON COMPOUNDS
SPECTRA
SPECTROSCOPY
STAR EVOLUTION
STARS
VARIATIONS