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Title:
Studies of bipolar nebulae. V - The general phenomenon
Authors:
Calvet, N.; Cohen, M.
Affiliation:
AA(California, University, Berkeley, Calif.), AB(California, University, Berkeley, Calif.)
Publication:
Royal Astronomical Society, Monthly Notices, vol. 182, Mar. 1978, p. 687-704. Research supported by the Consejo Nacional de Investigaciones Cientificas y Technologicas of Venezuela (MNRAS Homepage)
Publication Date:
03/1978
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOMETRY, COSMOLOGY, INFRARED ASTRONOMY, NEBULAE, RADIO ASTRONOMY, SPECTROPHOTOMETRY, LIGHT EMISSION, LINE SPECTRA, PLANETARY NEBULAE, STELLAR EVOLUTION
Comment:
A&AA ID. AAA021.134.015
Bibliographic Code:
1978MNRAS.182..687C

Abstract

Optical spectrophotometry, infrared photometry and radio continuum observations are combined to investigate the class of bipolar nebulae defined purely morphologically. The evolutionary status of these objects is considered. A few represent pre-main sequence objects; most seem to be proto-planetary nebulae; and a small number are evolved planetary nebulae.

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