The effect of mass loss on the evolution of low-mass post-AGB stars

Details The effect of mass loss on the evolution of low-mass post-AGB stars The effect of mass loss on the evolution of low-mass post-AGB stars

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...218l...1t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. L1-L4. Research supported by the Niels Stensen Fou

Astronomy and Astrophysics

Astrophysics

43

Planetary Nebulae, Stellar Evolution, Stellar Mass Ejection, H Alpha Line, Infrared Photometry, Spectral Energy Distribution

Scientific paper

New spectroscopic and photometric observations of four post-AGB stars are presented. The H-alpha profiles show evidence for a substantial mass loss. The presence of hot dust, which must have formed very recently, also points to a high mass loss rate for post-AGB stars. The mechanism responsible for the mass loss is not known. Order of magnitude estimates of the mass loss rates yields values of the order of 10 to the -8th to 10 to the -7th solar mass/yr, which is substantially higher than the Reimers mass loss. The high mass loss can speed up the evolution of low-mass post-AGB stars by one order of magnitude. This has drastic consequences for the formation of planetary nebulae, and can explain the existence of low-luminosity central stars of planetary nebulae.

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