Browsing by Author "Alexander, David M."

Now showing items 1-3 of 3

    • MODELING THE NUCLEAR INFRARED SPECTRAL ENERGY DISTRIBUTION OF TYPE II ACTIVE GALACTIC NUCLEI 
      Lira Teillery, Paulina; Videla, Liza; Wu, Yanling; Alonso-Herrero, Almudena; Alexander, David M.; Ward, Martin (2013-02-20)
      We present results from model fitting to the spectral energy distribution (SED) of a homogeneous sample of Seyfert II galaxies drawn from the 12μm Galaxy Sample. Imaging and nuclear flux measurements are presented in an ...
    • On the nature of AGN and star formation enhancement in the z=3.1 SSA22 protocluster: the HST WFC3 IR view 
      Monson, Erik B.; Lehmer, Bret D.; Doore, Keith; Eufrasio, Rafael T.; Bonine, Brett; Alexander, David M.; Harrison, Chris M.; Kubo, Mariko; Mantha, Kameswara B.; Sáez, Cristian; Straughn, Amber; Umehata, Hideki (IOP, 2021)
      We examine possible environmental sources of the enhanced star formation and active galactic nucleus (AGN) activity in the z = 3.09 SSA22 protocluster using Hubble WFC3 F160W (similar to 1.6 mu m) observations of the SSA22 ...
    • Spitzer number counts of active galactic nuclei in the goods fields 
      Treister, Ezequiel; Urry, C. Megan; Van Duyne, Jeffrey; Dickinson, Mark; Chary, Ranga-Ram; Alexander, David M.; Bauer, Franz Erik; Natarajan, Priya; Lira Teillery, Paulina; Grogin, Norman A. (IOP PUBLISHING, 2006-04-01)
      We present mid-infrared observations of active galactic nuclei (AGNs) in the GOODS fields, performed with the Spitzer Space Telescope. These are the deepest infrared and X-ray fields to date and cover a total area of similar ...