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The Near–Infrared κ-Space of Early and Late Type Galaxies

Published online by Cambridge University Press:  13 May 2016

D. Pierini
Affiliation:
Max-Planck-Institut für Kernphysik, D-69029, Germany
G. Gavazzi
Affiliation:
Universita′ degli Studi di Milano - Bicocca, P.zza dell'Ateneo Nuovo 1, 20126 Milano, Italy
P. Franzetti
Affiliation:
Universita′ degli Studi di Milano - Bicocca, P.zza dell'Ateneo Nuovo 1, 20126 Milano, Italy
M. Scodeggio
Affiliation:
Istituto di Fisica Cosmica del CNR, via Bassini 15, 20133 Milano, Italy
A. Boselli
Affiliation:
Laboratoire d'Astronomie Spatiale, Traverse du Siphon, 13376 Marseille Cedex 12, France

Abstract

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We present the near–infrared (H–band: λ = 1.65 μm) κ–space (κ1log M, κ2log Ie, κ3log M/L) of high surface–brightness early and late type galaxies, based on a sample of 419 objects optically selected in regions of the A262, Cancer, and Virgo clusters and of the Coma Supercluster. We discuss the distribution of the pressure–supported and rotationally–supported systems within this space and the ensuing scaling relations. We analyze the link between galaxy structure and star formation history through a comparison of the loci occupied by galaxies of the Local Universe in both the near–infrared (this work) and optical κ–spaces. Our results support scenarios of galaxy formation and evolution with the following fundamental ingredients: collapsing proto–galactic systems are characterized by i) a bimodal distribution in mass and angular momentum; and by ii) a mass–dependent characteristic star formation time scale.

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Copyright
Copyright © Astronomical Society of the Pacific 2001