The chronological sequence of circumstellar masers - Identifying proto-planetary nebulae

Abstract

view Abstract Citations (127) References (43) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Chronological Sequence of Circumstellar Masers: Identifying Proto--Planetary Nebulae Lewis, B. M. Abstract 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. Publication: The Astrophysical Journal Pub Date: March 1989 DOI: 10.1086/167194 Bibcode: 1989ApJ...338..234L Keywords: Interstellar Masers; Planetary Nebulae; Protoplanets; Stellar Envelopes; Stellar Evolution; Emission Spectra; Infrared Astronomy Satellite; Infrared Radiation; Late Stars; Water Masers; Astrophysics; INTERSTELLAR: MOLECULES; MASERS; NEBULAE: PLANETARY; STARS: CIRCUMSTELLAR SHELLS; STARS: EVOLUTION full text sources ADS | data products SIMBAD (28)