<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Watson, Casey R.</style></author><author><style face="normal" font="default" size="100%">Kochanek, Christopher S.</style></author><author><style face="normal" font="default" size="100%">Forman, William R.</style></author><author><style face="normal" font="default" size="100%">Hickox, Ryan C.</style></author><author><style face="normal" font="default" size="100%">Jones, Christine J.</style></author><author><style face="normal" font="default" size="100%">Brown, Michael J. I.</style></author><author><style face="normal" font="default" size="100%">Brand, Kate</style></author><author><style face="normal" font="default" size="100%">Dey, Arjun</style></author><author><style face="normal" font="default" size="100%">Jannuzi, Buell T.</style></author><author><style face="normal" font="default" size="100%">Kenter, Almus T.</style></author><author><style face="normal" font="default" size="100%">Murray, Steve S.</style></author><author><style face="normal" font="default" size="100%">Vikhlinin, Alexey</style></author><author><style face="normal" font="default" size="100%">Eisenstein, Daniel J.</style></author><author><style face="normal" font="default" size="100%">Fazio, Giovani G.</style></author><author><style face="normal" font="default" size="100%">Green, Paul J.</style></author><author><style face="normal" font="default" size="100%">McNamara, Brian R.</style></author><author><style face="normal" font="default" size="100%">Rieke, Marcia</style></author><author><style face="normal" font="default" size="100%">Shields, Joseph C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the Ages Survey</style></title><secondary-title><style face="normal" font="default" size="100%">The Astrophysical Journal</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">May 1, 2009</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://adsabs.harvard.edu/abs/2009ApJ...696.2206W</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">696</style></volume><pages><style face="normal" font="default" size="100%">2206-2219</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;We combine IR, optical, and X-ray data from the overlapping, 9.3deg&lt;sup&gt;2&lt;/sup&gt; NOAO Deep Wide-Field Survey, AGN and Galaxy EvolutionSurvey (AGES), and XBoötes Survey to measure the X-ray evolution of6146 normal galaxies as a function of absolute optical luminosity,redshift, and spectral type over the largely unexplored redshift range0.1 lsim z lsim 0.5. Because only the closest or brightest of thegalaxies are individually detected in X-rays, we use a stacking analysisto determine the mean properties of the sample. Our results suggest thatX-ray emission from spectroscopically late-type galaxies is dominated bystar formation, while that from early-type galaxies is dominated by acombination of hot gas and active galactic nucleus (AGN) emission. Wefind that the mean star formation and supermassive black hole accretionrate densities evolve like ~(1 + z)&lt;sup&gt;3±1&lt;/sup&gt;, in agreementwith the trends found for samples of bright, individually detectablestarburst galaxies and AGN. Our work also corroborates the results ofmany previous stacking analyses of faint source populations, withimproved statistics.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">n/a</style></notes><custom3><style face="normal" font="default" size="100%">eprintid: arXiv:0903.2219</style></custom3></record></records></xml>