Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21712806h&link_type=abstract
American Astronomical Society, AAS Meeting #217, #128.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Near-infrared (NIR) imaging covering the full GOODS-North (GOODS-N) field has been done only from the ground, using the CFHT and the Subaru telescopes. The lack of space-based NIR imaging in this field has increased the importance of these ground-based observations. We present the co-added/combined NIR images in the GOODS-N field obtained using the CFHT/WIRCam and the Subaru/MOIRCS instruments. MOIRCS observations cover approx. 60% of the central GOODS-N field, while WIRCam observations cover a much wider area. These archival imaging data in J and Ks filters were reduced independently and then combined to increase the depth of these observations in the ACS covered GOODS-N region. These combined images cover the GOODS-N area to a depth of about 25 AB mag in both filters. We also examine the feasibility of using (z-J) vs. (J-Ks) color selection in the ACS covered GOODS-N region to identify bright z-band dropouts, which are galaxy candidates at z=7. Our preliminary results indicate a very low surface density (approx. 0.01 objects per sq. arcmin) of bright (< 26 mag) z=7 galaxy candidates in the GOODS-N field. We discuss the importance of these NIR data, and the results obtained from our z-band dropout search.
Capak Peter
Hathi Nimish P.
Mobasher Bahram
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