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A near infrared view of Local Group dwarf galaxies

Published online by Cambridge University Press:  08 November 2005

M. Gullieuszik ,
E. V. Held ,
Y. Momany ,
I. Saviane ,
L. Rizzi  and
S. Ortolani
M. Gullieuszik
Affiliation:
Osservatorio Astronomico di Padova, INAF, vicolo dell'Osservatorio 5, I-35122 Padova, Italy Dip. di Astronomia, Università di Padova, vicolo dell'Osservatorio 2, I-35122 Padova, Italy
E. V. Held
Affiliation:
Osservatorio Astronomico di Padova, INAF, vicolo dell'Osservatorio 5, I-35122 Padova, Italy
Y. Momany
Affiliation:
Dip. di Astronomia, Università di Padova, vicolo dell'Osservatorio 2, I-35122 Padova, Italy
I. Saviane
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile
L. Rizzi
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822
S. Ortolani
Affiliation:
Dip. di Astronomia, Università di Padova, vicolo dell'Osservatorio 2, I-35122 Padova, Italy
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Abstract

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We present the results of near-infrared imaging of the dwarf spheroidal galaxies Fornax and Leo I as part of a photometric survey of stellar populations in Local Group dwarf galaxies. Wide-field observations in the J, H, and $K_s$ bands have been obtained with the SOFI camera at the ESO NTT at La Silla, Chile. The aim of this project is to study the evolution of Local Group dwarf spheroidal galaxies, with special regard to star formation at intermediate epochs. The near-infrared data, together with optical catalogs from the Padova Local Group wide-field survey, provide a very large color baseline ideal to study the properties of red giant branch (RGB) and asymptotic giant branch (AGB) stars.

Keywords

Local Groupgalaxies: dwarfgalaxies: individual (Fornax, Leo I)stars: AGB and post-AGBinfrared: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C198: Near-Field Cosmology with Dwarf Elliptical Galaxies , March 2005 , pp. 47 - 48
Copyright
© 2005 International Astronomical Union