New OH main-line detections of OH/IR stars

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Astrophysical Journal, Supplement Series; (USA)

DOI:https://doi.org/10.1086/191561· OSTI ID:5544508

Dickinson, D F; Turner, B E ^[1]

---

1. Lockheed Research Laboratories, Palo Alto, CA (USA) National Radio Astronomy Observatory, Charlottesville, VA (USA)

A comprehensive survey has been made of the main-line emission from hydroxyl molecules in OH/IR stars. A total of 41 new main-line emission sources are detected, 18 of which show masers in both main lines. The emission velocities generally show double-peaked 'shell structure' which tends to overlap that of the 1612 MHz velocities, suggesting that they may be at the same radius in the stellar atmosphere. A total of 55 stars was detected, most of which show classic double-peaked profiles centered on the stellar velocity. Nine of these stars have stronger emission at 1665 MHz than at 1667 MHz. The velocity correlation among the 1612, 1665, and 1667 MHz lines show a good qualitative support for the idea of competitive gain under saturated maser conditions. 30 refs.

• OSTI ID: 5544508
• Journal Information: Astrophysical Journal, Supplement Series; (USA), Journal Name: Astrophysical Journal, Supplement Series; (USA) Vol. 75; ISSN APJSA; ISSN 0067-0049
• 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
AMPLIFIERS
ATMOSPHERES
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
EQUIPMENT
HYDROXYL RADICALS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
RADICALS
SPECTRA
STAR EVOLUTION
STARS
STELLAR ATMOSPHERES
STELLAR RADIATION
VARIABLE STARS