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GOODS-Herschel: Separating High Redshift active galactic Nuclei and star forming galaxies Using Infrared Color Diagnostics
Allison Kirkpatrick, Alexandra Pope, Vassilis Charmandaris +17
We have compiled a large sample of 151 high redshift (z=0.5-4) galaxies selected at 24 microns (S24>100 uJy) in the GOODS-N and ECDFS fields for which we have deep Spitzer IRS spec…
Widespread and Hidden Active Galactic Nuclei in Star-Forming Galaxies at Redshift > 0.3
Stéphanie Juneau, Mark Dickinson, Frédéric Bournaud +23
We characterize the incidence of active galactic nuclei (AGNs) is 0.3 < z < 1 star-forming galaxies by applying multi-wavelength AGN diagnostics (X-ray, optical, mid-infrared, radi…
GOODS-Herschel: radio-excess signature of hidden AGN activity in distant star-forming galaxies
A. Del Moro, D. M. Alexander, J. R. Mullaney +23
We present here a new spectral energy distribution (SED) fitting approach that we adopt to select radio-excess sources amongst distant star-forming galaxies in the GOODS-Herschel (…
GOODS-Herschel: Impact of Active Galactic Nuclei and Star Formation Activity on Infrared Spectral Energy Distributions at High Redshift
Allison Kirkpatrick, Alexandra Pope, David M. Alexander +25
We explore the effects of active galactic nuclei (AGN) and star formation activity on the infrared (0.3-1000 microns) spectral energy distributions of luminous infrared galaxies fr…
The Globular Cluster System of NGC 4636 and Formation of Globular Clusters in Giant Elliptical Galaxies
Hong Soo Park, Myung Gyoon Lee, Ho Seong Hwang +5
We present a spectroscopic analysis of the metallicities, ages, and alpha-elements of the globular clusters (GCs) in the giant elliptical galaxy (gE) NGC 4636 in the Virgo cluster.…
Evidence for a wide range of UV obscuration in z ~ 2 dusty galaxies from the GOODS-Herschel survey
Kyle Penner, Mark Dickinson, Alexandra Pope +20
Dusty galaxies at z ~ 2 span a wide range of relative brightness between rest-frame mid-infrared (8um) and ultraviolet wavelengths. We attempt to determine the physical mechanism r…