NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-20 T22:47:43 PDT
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For refcode 1990ApJ...364L..33S:
Retrieve 36 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1990ApJ...364L..33S CORRELATIONS BETWEEN LINE STRENGTHS AND FINE STRUCTURE IN ELLIPTICAL GALAXIES FRANCOIS SCHWEIZER, PATRICK SEITZER, S. M. FABER, DAVID BURSTEIN, CRISTINA M. DALLE ORE, AND J. JESUS GONZALEZ Received 1990 July 18; accepted 1990 September 13 ABSTRACT For 36 giant elliptical galaxies located mostly in the field and in groups, the strength of the nuclear H{beta} absorption line at any given absolute magnitude increases systematically with the amount of fine structure (ripples, jets of luminous matter, X-structure, and boxy isophotes), while the strengths of the CN and Mg I + MgH features decrease. This effect is most likely due to systematic variations in mean age, rather than mean metallicity, of the stellar populations. We use the resulting correlations to estimate the contributions of age and metallicity variations to line-strength scatter and suggest that the elusive population of intermediate-age remnants of major disk-disk mergers may be found among ellipticals with much fine structure and enhanced H{beta} absorption. Subject headings: galaxies: evolution - galaxies: interactions - galaxies: stellar content - galaxies: structure
Retrieve 36 NED objects in this reference.
Please click here for ADS abstract

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