A study of OH/IR stars and planetary nebula formation

Abstract

view Abstract Citations (40) References (52) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Study of OH/IR Stars and Planetary Nebula Formation Bowers, P. F. ; Knapp, G. R. Abstract Seventeen objects which are candidates for newly formed planetary nebulae have been searched for radio continuum emissions at 4885 MHz with the VLA. The candidates include eight OH 1612 MHz maser sources with only a single emission component or with a large ratio of blue to redshifted emission (similar to the compact planetary nebula Vy 2-2) and the highly evolved stars IRC + 10420, CRL 2688, OH 231.8 + 4.2, and M1-92. Continuum emission from M1-92 was detected and mapped, confirming it as a young planetary nebula. The emission from the compact planetary nebula M2-9 was also mapped, and its radio structure agrees very well with that seen in the optical. Accurate VLA positions were obtained for 24 OH 1612 MHz maser sources (including the eight single-featured objects) between Galactic longitudes of 340 and 30 deg. Most or all of the sources are OH/IR stars. Publication: The Astrophysical Journal Pub Date: December 1989 DOI: 10.1086/168121 Bibcode: 1989ApJ...347..325B Keywords: Hydroxyl Emission; Infrared Stars; Interstellar Masers; Planetary Nebulae; Radio Emission; Stellar Evolution; Asymptotic Giant Branch Stars; Emission Spectra; Infrared Astronomy Satellite; Red Shift; Stellar Envelopes; Very Large Array (Vla); Astrophysics; INFRARED: SOURCES; MASERS; NEBULAE: PLANETARY; STARS: CIRCUMSTELLAR SHELLS full text sources ADS | data products SIMBAD (32)