NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-21 T16:10:26 PDT
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For refcode 2003MNRAS.339L..12C:
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Copyright by Royal Astronomical Society. 2003MNRAS.339L..12C Near-infrared line-strengths in elliptical galaxies: evidence for initial mass function variations? Cenarro, A. J.; Gorgas, J.; Vazdekis, A.; Cardiel, N.; Peletier, R. F. Abstract. We present new relations between recently defined line-strength indices in the near-infrared (CaT*, CaT, PaT, MgI and sTiO) and central velocity dispersion ({sigma}_0_) for a sample of 35 early-type galaxies, showing evidence for significant anti-correlations between CaII triplet indices (CaT* and CaT) and log {sigma}_0_. These relations are interpreted in the light of our recent evolutionary synthesis model predictions, suggesting the existence of important Ca underabundances with respect to Fe and/or an increase of the dwarf to giant stars ratio along the mass sequence of elliptical galaxies. Keywords: galaxies: elliptical and lenticular, cD, galaxies: stellar content
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