RT Journal Article
T1 Near-infrared line-strengths in elliptical galaxies: evidence for initial mass function variations?
A1 Cenarro, A. J.
A1 Gorgas García, Francisco Javier
A1 Vazdekis, A.
A1 Cardiel López, Nicolás
A1 Peletier, R. F.
AB 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 Ca ii 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.
PB Wiley
SN 0035-8711
YR 2003
FD 2003-02-11
LK https://hdl.handle.net/20.500.14352/51343
UL https://hdl.handle.net/20.500.14352/51343
LA eng
NO This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. © 2003 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. We are indebted to the anonymous referee for very useful suggestions. This work was supported by the Spanish research project No. AYA2000-977.
NO Spanish research project
DS Docta Complutense
RD 8 abr 2025