Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..399...67l&link_type=abstract
Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399, proceedings of the conference held 11-16 Dece
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We model the formation, evolution, and multi-band properties of quasars at z ˜ 6, by combining hydrodynamic simulations (Li et al. 2007) with radiative transfer calculations using ART^2 -- All-wavelength Radiative Transfer with Adaptive Refinement Tree (Li et al. 2008). Our model shows that luminous quasars at z ˜ 6 can form through hierarchical galaxy mergers in the LCDM cosmology, and our calculations reproduce a number of observations of z ˜ 6 quasars, including the black hole masses, dust properties, and multi-wavelength SEDs and luminosities. We find that SMBHs grow via gas accretion under Eddington limit, without invoking exotic process. The quasar host obeys the Magorrian relation observed locally as a result of coeval growth of the SMBH and its host galaxy. Furthermore, the quasar systems evolve from cold to warm ULIRGs as they transform from a starburst to a quasar.
Fazio Giacomo
Hernquist Lars
Li Yadong
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