Chronological sequence of circumstellar masers - Identifying proto-planetary nebulae

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/167194· OSTI ID:6034237

Lewis, B M

The trends arising in circumstellar shells due to the presence or absence of various circumstellar masers are studied as a function of the far-infrared colors of the masers. Several of these trends show up most clearly as a dependence of the detection rate for particular masers on the (25-12) micron color, which is correlated with the rate of mass loss. This principle is used to suggest a chronological sequence for the development of a circumstellar envelope which explains most extant observations. The masers exhibited by a shell can then be used to diagnose the current phase. This approach is used to identify OH/IR stars that may be early examples of the protoplanetary nebula phase. 50 refs.

• Research Organization: Arecibo Observatory, PR
• OSTI ID: 6034237
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 338; ISSN ASJOA
• 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
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
EQUIPMENT
HYDROGEN COMPOUNDS
INFRARED RADIATION
INTERSTELLAR SPACE
MASERS
MASS TRANSFER
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
NEBULAE
OXYGEN COMPOUNDS
PLANETARY NEBULAE
RADIATIONS
SPACE
SPECTRA
STAR EVOLUTION
STARS
WATER