{"year":"2007","scopus_import":"1","_id":"17753","article_processing_charge":"No","date_updated":"2024-09-30T07:55:40Z","title":"Reconstructing the cosmic evolution of quasars from the age distribution of local early‐type galaxies","issue":"2","abstract":[{"text":"We use the spectra of 22,000 nearby early-type galaxies from the Sloan Digital Sky Survey (SDSS) to determine the age distribution of these galaxies as a function of their velocity dispersion sigma_v in the range 100 km/s < sigma_v < 280 km/s. We then combine the inferred age-distributions with the local abundance of spheroids, including early-type galaxies and late-type bulges, to predict the evolution of the quasar luminosity function (LF) in the redshift range 0<z<6. We make the following simple assumptions: (i) the formation of stars in each galaxy, at the epoch identified with the mean mass-weighted stellar age, is accompanied by the prompt assembly of the nuclear supermassive black hole (SMBH); (ii) the mass of the SMBH obeys the M_bh-sigma_v correlation observed in nearby galaxies; (iii) the SMBH radiates at a fraction f_Edd of the Eddington limit for a fixed duration t_Q, and is identified as a luminous quasar during this epoch, (iv) the intrinsic dispersions in the Eddington ratio and the M_bh-sigma_v relation produce a combined scatter of Delta(log L_Q) around the mean logarithmic quasar luminosity <log L_Q> at fixed sigma_v. These assumptions require that the SMBH remnants of quasars with bolometric luminosity below L_bol=10^{12.5} f_Edd L_sun reside predominantly in bulges of late type galaxies. We find that evolution of the observed quasar LF can be fit over the entire redshift range in this simple model, 0<z<6 with the choices of Delta(log L_Q)=0.6-0.9, t_Q= (6-8)x10^7 yr, and <f_Edd>=0.3-0.5. We find no evidence that any of the model parameters evolves with redshift, supporting the strong connection between the formation of stars and nuclear SMBHs in spheroids.","lang":"eng"}],"author":[{"full_name":"Haiman, Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán","last_name":"Haiman"},{"last_name":"Jimenez","first_name":"Raul","full_name":"Jimenez, Raul"},{"last_name":"Bernardi","first_name":"Mariangela","full_name":"Bernardi, Mariangela"}],"language":[{"iso":"eng"}],"status":"public","date_published":"2007-04-01T00:00:00Z","publication_status":"published","citation":{"ieee":"Z. Haiman, R. Jimenez, and M. Bernardi, “Reconstructing the cosmic evolution of quasars from the age distribution of local early‐type galaxies,” <i>The Astrophysical Journal</i>, vol. 658, no. 2. American Astronomical Society, pp. 721–730, 2007.","ista":"Haiman Z, Jimenez R, Bernardi M. 2007. Reconstructing the cosmic evolution of quasars from the age distribution of local early‐type galaxies. The Astrophysical Journal. 658(2), 721–730.","mla":"Haiman, Zoltán, et al. “Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early‐type Galaxies.” <i>The Astrophysical Journal</i>, vol. 658, no. 2, American Astronomical Society, 2007, pp. 721–30, doi:<a href=\"https://doi.org/10.1086/510840\">10.1086/510840</a>.","apa":"Haiman, Z., Jimenez, R., &#38; Bernardi, M. (2007). Reconstructing the cosmic evolution of quasars from the age distribution of local early‐type galaxies. <i>The Astrophysical Journal</i>. American Astronomical Society. <a href=\"https://doi.org/10.1086/510840\">https://doi.org/10.1086/510840</a>","ama":"Haiman Z, Jimenez R, Bernardi M. Reconstructing the cosmic evolution of quasars from the age distribution of local early‐type galaxies. <i>The Astrophysical Journal</i>. 2007;658(2):721-730. doi:<a href=\"https://doi.org/10.1086/510840\">10.1086/510840</a>","chicago":"Haiman, Zoltán, Raul Jimenez, and Mariangela Bernardi. “Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early‐type Galaxies.” <i>The Astrophysical Journal</i>. American Astronomical Society, 2007. <a href=\"https://doi.org/10.1086/510840\">https://doi.org/10.1086/510840</a>.","short":"Z. Haiman, R. Jimenez, M. Bernardi, The Astrophysical Journal 658 (2007) 721–730."},"month":"04","article_type":"original","page":"721-730","oa":1,"volume":658,"publication_identifier":{"issn":["0004-637X","1538-4357"]},"quality_controlled":"1","extern":"1","date_created":"2024-09-06T09:40:51Z","intvolume":"       658","type":"journal_article","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1086/510840"}],"publisher":"American Astronomical Society","publication":"The Astrophysical Journal","day":"01","oa_version":"Published Version","doi":"10.1086/510840"}