The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey

Details The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey

2009-03-12

arxiv.org/abs/0903.2219v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

19 pages, 15 figures, 3 tables, accepted for publication in ApJ

Scientific paper

10.1088/0004-637X/696/2/2206

We combine IR, optical and X-ray data from the overlapping, 9.3 square degree NOAO Deep Wide-Field Survey (NDWFS), AGN and Galaxy Evolution Survey (AGES), and XBootes Survey to measure the X-ray evolution of 6146 normal galaxies as a function of absolute optical luminosity, redshift, and spectral type over the largely unexplored redshift range 0.1 < z < 0.5. Because only the closest or brightest of the galaxies are individually detected in X-rays, we use a stacking analysis to determine the mean properties of the sample. Our results suggest that X-ray emission from spectroscopically late-type galaxies is dominated by star formation, while that from early-type galaxies is dominated by a combination of hot gas and AGN emission. We find that the mean star formation and supermassive black hole accretion rate densities evolve like (1+z)^3, in agreement with the trends found for samples of bright, individually detectable starburst galaxies and AGN. Our work also corroborates the results of many previous stacking analyses of faint source populations, with improved statistics.

Affiliated with

Also associated with

No associations

Rating

The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-36913