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5 papers · 2 filters
A High Resolution HI Study of Selected Virgo Galaxies - Preliminary Results on Gas Morphology & Extra-Planar Gas
Aeree Chung, J. H. van Gorkom, Jeffery D. P. Kenney +1
We present preliminary results of VLA HI imaging of selected Virgo cluster galaxies. The goal is to study environmental effects on galaxy evolution. Our sample of 41 galaxies is sp…
AGN Unification and the X-ray Background
Ezequiel Treister, C. M. Urry
Active Galactic Nuclei (AGN) unification, which implies a large number of obscured AGN, can explain the optical, infrared and X-ray content of deep multiwavelength surveys. Here, w…
The redshift distribution of gamma-ray bursts revisited
Priyamvada Natarajan, Badr Albanna, Jens Hjorth +3
In this letter, we calculate the redshift distribution of gamma-ray bursts assuming that they trace (i) the globally averaged star formation rate or (ii) the average metallicity in…
An Initial Look at the FIR-Radio Correlation within M51a using Spitzer
Eric J. Murphy, Lee Armus, George Helou +2
We present an initial look at the FIR-radio correlation within the star-forming disk of M51a using {\it Spitzer} MIPS imaging, observed as part of the {\it Spitzer} Infrared Nearby…
Infrared Number Counts of AGN in the GOODS Fields
E. Treister, C. Megan Urry, the GOODS AGN Team
Using the known numbers and evolution of unobscured AGN, and assuming that there is a large number of corresponding obscured AGN -- as expected if AGN unification is correct -- we…