Planetary nebulae

Details Planetary nebulae Planetary nebulae

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981prir.........3s&link_type=abstract

Priroda, July 1981, p. 3-13. In Russian.

Computer Science

Planetary Nebulae, Stellar Evolution, White Dwarf Stars, Emission Spectra, Infrared Stars, Line Spectra, Main Sequence Stars, Red Giant Stars, Stellar Envelopes, Stellar Luminosity, Stellar Mass, Stellar Spectra

Scientific paper

A scheme is proposed for the evolution of a star which culminates in the formation of a planetary nebula and a white dwarf. The stages of this evolution include: a main sequence star of 1-4 solar masses; a red giant of high luminosity with excess carbon content; a compact infrared source; an extended infrared envelope also emitting at the H2, CO, and OH lines; the appearance of emission lines in the spectrum; a bright compact region of ionized hydrogen, with the observation of several infrared and molecular lines; a young bright compact planetary nebula; parallel formation of a hot ultraviolet star and a normal planetary nebula; and formation of the white dwarf.

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