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| Paper: |
Radio Study of the Lockman Hole ISOPHOT Survey Sources |
| Volume: |
240, Gas and Galaxy Evolution: A Conference in Honor of the 20th Anniversary of the VLA |
| Page: |
123 |
| Authors: |
Yun, M. S.; Sanders, D.; Kawara, K.; Oyabu, S.; Taniguchi, Y.; Okuda, H. |
| Abstract: |
One of the most exciting discoveries made by the Infrared Space Observatory (ISO) was the detection of a substantial excess in the number density of faint far-infrared (95 μm & 175 μm) sources, suggesting strong cosmological evolution in the population of luminous infrared galaxies. The number density of 175μm sources derived from two deep fields (each 44' × 44') in the Lockman Hole region is >≈10 times larger than predicted from no-evolution models. Several lines of reasoning suggest that the majority of the faint ISOPHOT sources may be at modest redshift (z<≈1), and the ISOPHOT sources appear to bridge the gap between the starburst galaxies in the local universe and z>=2 obscured starbursts detected by the SCUBA surveys. We have carried out deep, high-resolution 1.4 GHz observations of the ISOPHOT survey fields using the VLA as part of a multi-wavelength follow-up study. In concert with deep optical and near-infrared (B, V, R, I, K) imaging, individual ISOPHOT sources are identified using high-resolution radio continuum images. Spectroscopic observations to determine the redshift and the nature of the powering sources are currently underway. Combined with ongoing SCUBA observations, photometric redshifts may be obtained even for sources that are heavily obscured. We are also investigating the nature of a radio selected galaxy sample using the same multi-wavelength database. |
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