The evolution of irradiated stars

Details The evolution of irradiated stars The evolution of irradiated stars

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..427t&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 1, 1989, p. 427-438. Research supported by SER

Astronomy and Astrophysics

Astronomy

26

Active Galactic Nuclei, Galactic Radiation, Irradiation, Radiation Effects, Stellar Evolution, Hertzsprung-Russell Diagram, Quasars, Red Giant Stars, Stellar Envelopes

Scientific paper

Stars less than a few pc from a quasar or an active galactic nucleus are subject to an intense radiation flux. The effects on the structure and evolution of such stars are investigated by evolving models in isotropic radiation baths at constant temperatures between 10 exp 3.75 and 10 to the 4th. The effects on stars with radiative envelopes are found to be small, while stars with convective envelopes generally increase in size. Redistribution of energy is found to prolong Hertzsprung-gap evolution of all stars and to shorten the main-sequence lifetimes of very-low-mass stars. It is found that the bloated giants are likely to undergo extensive mass loss soon after they begin to expand.

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