Browsing by Author "Caldwell, Nelson"

Now showing items 1-2 of 2

    • Host Galaxies, Clustering, Eddington Ratios, and Evolution of Radio, X-Ray, and Infrared-selected AGNs. 

      Hickox, Ryan C.; Jones, Christine; Forman, William R.; Murray, Stephen; Kochanek, Christopher S.; Eisenstein, Daniel; Jannuzi, Buell T.; Dey, Arjun; Brown, Michael J. I.; Stern, Daniel; Eisenhardt, Peter R.; Gorjian, Varoujan; Brodwin, Mark; Narayan, Ramesh; Cool, Richard J.; Kenter, Almus; Caldwell, Nelson; Anderson, Michael E. (IOP Publishing, 2009)
      We explore the connection between different classes of active galactic nuclei (AGNs) and the evolution of their host galaxies, by deriving host galaxy properties, clustering, and Eddington ratios of AGNs selected in the ...

    • Optical Spectroscopy of Type Ia Supernovae 

      Matheson, T.; Kirshner, Robert P.; Challis, Peter M.; Jha, S.; Garnavich, P. M.; Berlind, Perry; Calkins, Michael Lee; Blondin, S.; Balog, Z.; Bragg, A. E.; Caldwell, Nelson; Concannon, K. Dendy; Falco, E. E.; Graves, G. J. M.; Huchra, J. P.; Kuraszkiewicz, Joanna; Mader, J. A.; Mahdavi, A.; Phelps, Matthew William; Rines, K.; Song, I.; Wilkes, Belinda Jane (IOP Publishing, 2008)
      We present 432 low-dispersion optical spectra of 32 Type Ia supernovae (SNe Ia) that also have well-calibrated light curves. The coverage ranges from 6 epochs to 36 epochs of spectroscopy. Most of the data were obtained ...