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Faint Submillimeter Galaxies behind the Massive Lensing Cluster A2390
Chian-Chou Chen, Lennox L. Cowie
Current studies on Submillimeter Galaxies (SMGs) mostly focus on bright sources with 850 micron flux greater than 2 mJy, and the results have shown that they are likely high redshi…
A Ks and IRAC Selection of High-Redshift Extremely Red Objects
Wei-Hao Wang, Amy J. Barger, Lennox L. Cowie
In order to find the most extreme dust-hidden high-redshift galaxies, we select 196 extremely red objects in the Ks and IRAC bands (KIEROs, [Ks-4.5um](AB)>1.6) in the 0.06 deg^2 GO…
The Faintest X-ray Sources from z=0-8
L. L. Cowie, A. J. Barger, G. Hasinger
We use the new 4 Ms exposure of the CDF-S field obtained with the Chandra X-ray satellite to investigate the properties of the faintest X-ray sources over a wide range of redshifts…
The UV-continuum properties of Ly alpha selected galaxies at z=6.5
Lennox L. Cowie, Esther M. Hu, Antoinette Songaila
We report the first space-based very deep near-infrared continuum observations of a uniform sample of z = 6.5 galaxies with log(L(L_alpha)) = 42.5 - 43 erg/s selected from narrow-b…
Ly alpha emitting galaxies as early stages in galaxy formation
Lennox L. Cowie, Amy J. Barger, Esther M. Hu
We present optical spectroscopy of two samples of GALEX grism selected Ly alpha emitters (LAEs): one at z=0.195-0.44 and the other at z=0.65-1.25. We have also observed a compariso…
Submillimeter sources behind the massive lensing clusters A370 and A2390
Chian-Chou Chen, Lennox L. Cowie, Wei-Hao Wang +2
We report 850 micron Submillimeter Array (SMA) observations of four gravitationally lensed submillimeter galaxies (SMGs), A370-2, A2390-1, A2390-3 and A2390-4, which were originall…