Normal O stars in dense media generate LINERs

Details Normal O stars in dense media generate LINERs Normal O stars in dense media generate LINERs

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...399l..27s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 399, no. 1, p. L27-L30.

Astronomy and Astrophysics

Astrophysics

106

Active Galactic Nuclei, Emission Spectra, Main Sequence Stars, O Stars, Astronomical Spectroscopy, Nebulae, Photoionization, Seyfert Galaxies, Star Formation

Scientific paper

LINERs are often regarded as low-luminosity extensions of quasar and Seyfert phenomena that may be powered by accretion onto a massive black hole. New calculations are presented that show that the general characteristics of LINERs can be generated via photoionization by relatively hot yet normal main-sequence O stars. The calculation results show improved agreement with observed LINER properties if the irradiated plasma is relatively dense and characterized by solar abundances modified by normal grain depletion. Unusually dense circumstellar media may be a natural consequence of high interstellar pressures, which may explain the preference of LINER phenomena for the nuclei of large and early-type galaxies.

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