Black Hole Growth in a Cosmological Context and the Associated Cosmic Star Formation History
Abstract
Based on a co-evolution scenario of massive black holes (MBH) and their host spheroids, we trace the BH growth and the joint cosmic star formation history by ROSAT X-ray All sky surveys. We found: 1) the total amount of star formation associated with MBH growth is at least half of the net star formation at high redshift, which probably missed by the current UV/opt. deep surveys; 2) an upper limit of the abundance ratio of type 2 to type 1 QSOs is about 2, within the constraints of the local BH density, the Chandra hard x-ray deep surveys and the SCUBA counts; 3)the peak redshift of the massive spheroid formation in this case is around 1.5-2.
- Publication:
-
Growing Black Holes: Accretion in a Cosmological Context
- Pub Date:
- 2005
- DOI:
- 10.1007/11403913_88
- Bibcode:
- 2005gbha.conf..472W
- Keywords:
-
- Black Holes;
- Cosmology