Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203...52t&link_type=abstract
Astrophysical Journal, vol. 203, Jan. 1, 1976, pt. 1, p. 52-62.
Astronomy and Astrophysics
Astronomy
210
Astronomical Photometry, Cosmology, Elliptical Galaxies, Galactic Evolution, Infrared Astronomy, Star Distribution, Astronomical Models, Broadband, Dwarf Stars, Giant Stars, Main Sequence Stars, Stellar Evolution, Stellar Spectra, Tables (Data)
Scientific paper
Broad-band photometric data and infrared line indices have been combined with recent results for giant-branch luminosity functions to obtain population syntheses for giant elliptical galaxies. If the main-sequence mass function is a power law of slope x, a value of x less than unity is indicated. This yields rather rapid luminosity evolution and a large correction to the deceleration parameter as derived from the Hubble diagram for first-ranked cluster ellipticals. The uncertainties are discussed.
Gunn James E.
Tinsley Beatrice M.
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