Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early‐Type Galaxies | Zendy

Zoltàn Haiman | Zendy; Raúl Jiménez | Zendy; Mariangela Bernardi | Zendy

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Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early‐Type Galaxies

Author(s) -

Zoltàn Haiman,

Raúl Jiménez,

Mariangela Bernardi

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/510840

Subject(s) - physics , astrophysics , quasar , supermassive black hole , galaxy , redshift , eddington luminosity , astronomy , luminosity function , velocity dispersion , active galactic nucleus , galaxy formation and evolution , stellar mass , star formation

We use the spectra of 22,000 nearby early-type galaxies from the SloanDigital Sky Survey (SDSS) to determine the age distribution of these galaxiesas a function of their velocity dispersion sigma_v in the range 100 km/s at fixed sigma_v. These assumptions require that the SMBHremnants of quasars with bolometric luminosity below L_bol=10^{12.5} f_EddL_sun reside predominantly in bulges of late type galaxies. We find thatevolution of the observed quasar LF can be fit over the entire redshift rangein this simple model, 0=0.3-0.5. We find no evidence that any of the modelparameters evolves with redshift, supporting the strong connection between theformation of stars and nuclear SMBHs in spheroids.Comment: Submitted to Ap

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