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Galaxy properties from voids to clusters in the SDSS-DR4

Published online by Cambridge University Press:  01 August 2006

G. Sorrentino ,
A. Rifatto  and
V. Antonuccio-Delogu
G. Sorrentino
Affiliation:
INAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ITALY Dip. di Fisica e Astronomia, Universitá di Catania, Via S.Sofia 78, 95123 Catania, ITALY INAF-VSTceN, Via Moiariello 16, 80131 Napoli, ITALY
A. Rifatto
Affiliation:
INAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ITALY
V. Antonuccio-Delogu
Affiliation:
INAF-Osservatorio Astrofisico di Catania, Via S.Sofia 78, 95123 Catania, ITALY
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Abstract

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We investigate the environmental dependence of galaxy populations properties in the SDSS-DR4. Our aim is to search for systematic variations in the properties of galaxies with the local galaxy density in order to find hints that can be related to the presence of a void galaxy population. We find that galaxies in underdense regions (voids) are fainte and bluer than cluster galaxies. Moreover, the transition from underdense to overdense regions is smooth, as well as the percentage of late-type galaxies decreases while the percentage of early-type galaxies increases smoothly from underdense to dense environments.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 243
Copyright
Copyright © International Astronomical Union 2007