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Multi-wavelength Studies of Cluster Star Forming Galaxies at z∼0.54

Published online by Cambridge University Press:  21 March 2013

S. M. Randriamampandry ,
S. M. Crawford ,
C. M. Cress ,
K. M. Hess ,
E. Giovannoli  and
M. Vaccari
S. M. Randriamampandry
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, Cape Town, South Africa, e-mail: solohery@saao.ac.za Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535, Cape Town, South Africa
S. M. Crawford
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, Cape Town, South Africa, e-mail: solohery@saao.ac.za
C. M. Cress
Affiliation:
Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535, Cape Town, South Africa Centre for High Performance Computing, 15 Lower Hope Street, Rosebank, Cape Town, South Africa
K. M. Hess
Affiliation:
Astrophysics, Cosmology and Gravity Centre, Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, Cape Town, South Africa
E. Giovannoli
Affiliation:
Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535, Cape Town, South Africa
M. Vaccari
Affiliation:
Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535, Cape Town, South Africa
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Abstract

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We carry out a multi-wavelength analysis of star forming galaxies in the massive cluster MS0451.6-0305 at z∼0.54 to shed light on the evolution of the far-infrared-radio relationship in rich clusters. We have performed Spectral Energy Distribution (SED) fitting of IRAC 3.6μ, IRAC 4.5μ and MIPS 24μ photometry from Spitzer to derive the total infrared bolometric luminosity of spectroscopically confirmed cluster members with radio counterparts. The radio flux densities were measured from deep Very Large Array (VLA) radio continuum observations. The relationship between the infrared and radio luminosities for our sources show the strong correlation found between these two parameters for star forming galaxies. The far-infrared to radio luminosity ratio (qIR) values measured for these sources are comparable to those measured in low redshift clusters and indicative of an excess of radio emission.

Keywords

galaxies: clusters — galaxies: evolution — infrared: galaxies — radio continuum: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 337
Copyright
Copyright © International Astronomical Union 2013

References

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