Active Galaxies


Active Galaxies

Active Projects

The Role of AGN in Galaxy Formation

Main Collaborators: F. Ciavano, G. Hassinger, H. Fu, Y. Kakazu, B. Mobasher, M. Salvato, N. Scoville, L. Yan

In 2012 we obtained 2.8Ms of Chandra time for the COSMOS-Legacy XVP project. This survey will address the growth of structure in the universe from re-ionization to the peak of star formation (2<z<6) and the co-evolution of supermassive black holes and galaxies in these structures by finding unpreccedented numbers of high-redshift AGN. Furhtermore, the large number of AGN found at lower redshifts will allow us to use clustering statistics to link AGN to the underlying dark matter halos that host them.

In addition to the broad demographics of the AGN population its important to understand the details of how AGN impact the formation and evolution of individual galaxies. Using the Spitzer IRS, Subaru FMOS, Keck DEIMOS, and Keck MOSFIRE spectroscopy we are trying to better understand the roll these AGN play in galaxy evolution by measuring black hole masses and other galaxy properties.

Publications:
Masters, Capak et al. 2012
Donley...Capak et al. 2012
Salvato...Capak et al. 2011
Civano...Capak et al. 2011

 

Past Projects

Pan-Chromatic Spectral-Energy-Distributions for Active Galactic Nuclie

Main Collaborators: D. Hanish, H. Teplitz, V. Desai

We are using the Spitzer enhanced imaging products along with the Sloan Digital Sky Survey quasar catalog to develop pan-chromatic spectral energy distributions for Quasars. We found an excess of emission at rest frame 20-100 microns above the most comonly used templates.

Publications:
Hanish...Capak et al. 2013

 


Probing the Quasar Luminosity Function at 3<z<6

Main Collaborators: D. Masters, B. Mobasher, T. Nagau, H. Ikeda, E. Glikman, S. G. Djorgovski

Recent studies of the quasar luminosity function at z>3 have found very different numbers of faint quasars. The number density of these faint quasars has important implications for re-ionizaiton of the universe and the growth of black holes. We have developed a novel technique to differentiate stars and quasars based on pan-chromatic imaging data in the COSMOS survey.

Publications:
Masters, Capak et al. 2012
Ikeda...Capak et al. 2012
Ikeda...Capak et al. 2011


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Capak Research Areas:
High Redshift Galaxies
Galaxy Evolution
Active Galaxies
Gravitational Lensing
Photometric Redshifts
Astrophysics Software
Links:
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Other Links

Relavent Publications:
Hanish...Capak et al. 2013
Masters, Capak et al. 2012
Ikeda...Capak et al. 2012
Donley...Capak et al. 2012
Civano...Capak et al. 2011
Salvato...Capak et al. 2011
Civano...Capak et al. 2011
Ikeda...Capak et al. 2011
Silverman...Capak et al. 2011

 

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last update: 09/15/2013   ©2011 Peter L. Capak. All Rights Reserved. image