Galaxies infalling into Abell 1763 detected by Spitzer.

Details Galaxies infalling into Abell 1763 detected by Spitzer. Galaxies infalling into Abell 1763 detected by Spitzer.

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...20925203f&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #252.03; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present wide-field Spitzer observations of the galaxy cluster Abell 1763, a rich cluster at redshift of 0.2. We have obtained redshifts for more than 500 infrared sources in the field using the wide-field (1 square degree) fiber spectrograph Hydra on the WIYN telescope and the multi-slit spectrograph Dolores on the TNG telescope. Among them, we found more than 100 cluster members bright in the far-infrared. Most of these galaxies are concentrated along a radial region suggesting an inflow of galaxies which are entering the intra-cluster medium for the first time. From their optical spectra and a deep X-ray image of the field obtained with XMM, we conclude that most of the infrared emission is due to obscured star formation.

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