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Title:
NGC 1275 - A burgeoning elliptical galaxy
Authors:
Wirth, A.; Kenyon, S. J.; Hunter, D. A.
Affiliation:
AA(Illinois, University, Urbana, IL)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 269, June 1, 1983, p. 102-106. Research supported by the University of Illinois. (ApJ Homepage)
Publication Date:
06/1983
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Photometry, Elliptical Galaxies, Galactic Evolution, Peculiar Galaxies, Stellar Evolution, Absorption Spectra, Galactic Nuclei, H Beta Line, Neon, Oxygen Spectra, Spectrophotometry, Star Formation Rate, Ubv Spectra
DOI:
10.1086/161023
Bibliographic Code:
1983ApJ...269..102W

Abstract

Large-aperture spectrophotometry of the peculiar galaxy NGC 1275 is presented. Emission lines from H-beta and the forbidden O II, O III, and Ne III dominate this spectrum, while H-delta, H-epsilon and Na D appear in absorption. A population synthesis model for the absorption-line spectrum suggests that about 20 percent of the optical luminosity is produced by B stars. On the basis of this and the calculated H-beta emission line flux, it is estimated that the current star formation rate in NGC 1275 is about 30 solar masses per yr. This leads to a predicted supernova rate of 1 per yr. The resulting supernova heating rate is approximately one-half the cooling rate predicted by current accretion models and may thus significantly alter the accretion flow. It is proposed that in NGC 1275, the formation of an elliptical galaxy in the cluster potential may be under way.

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