The Sloan Digital Sky Survey Reverberation Mapping Project: No evidence for evolution in the M{sub ∙}−σ{sub ∗} RELATION TO z∼1
- Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871 (China)
- Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)
- Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA, 16802 (United States)
- Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States)
- SUPA Physics/Astronomy, University of St. Andrews, St. Andrews KY16 9SS, Scotland (United Kingdom)
- Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065 (United States)
- Max-Planck Institute fuer Extraterrestrische Physik, Giessenbachstr. 1, D-85748 Garching (Germany)
- Institut d’Astrophysique de Paris, Université Paris 6 and CNRS, 98bis Boulevard Arago, F-75014 Paris (France)
- Kavli Institute for the Physics and Mathematics of the universe (Kavli IPMU, WPI), The University of Tokyo, Kashiwa 277-8583 (Japan)
- Centre de Physique des Particules de Marseille, Aix-Marseille Université , CNRS/IN2P3, 163, avenue de Luminy—Case 902-F-13288 Marseille Cedex 09 (France)
- Apache Point Observatory and New Mexico State University, P.O. Box 59, sunspot, NM 88349 (United States)
We present host stellar velocity dispersion measurements for a sample of 88 broad-line quasars at 0.1<1 (46 at z>0.6) from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project. High signal-to-noise ratio coadded spectra (average S/N≈30 per 69 km s{sup −1} pixel) from SDSS-RM allowed for the decomposition of the host and quasar spectra and for measurements of the host stellar velocity dispersions and black hole (BH) masses using the single-epoch (SE) virial method. The large sample size and dynamic range in luminosity (L{sub 5100}=10{sup 43.2−44.7} erg s{sup −1}) lead to the first clear detection of a correlation between SE virial BH mass and host stellar velocity dispersion far beyond the local universe. However, the observed correlation is significantly flatter than the local relation, suggesting that there are selection biases in high-z luminosity-threshold quasar samples for such studies. Our uniform sample and analysis enable an investigation of the redshift evolution of the M{sub ∙}−σ{sub ∗} relation relatively free of caveats by comparing different samples/analyses at disjoint redshifts. We do not observe evolution of the M{sub ∙}−σ{sub ∗} relation in our sample up to z∼1, but there is an indication that the relation flattens toward higher redshifts. Coupled with the increasing threshold luminosity with redshift in our sample, this again suggests that certain selection biases are at work, and simple simulations demonstrate that a constant M{sub ∙}−σ{sub ∗} relation is favored to z∼1. Our results highlight the scientific potential of deep coadded spectroscopy from quasar monitoring programs, and offer a new path to probe the co-evolution of BHs and galaxies at earlier times.
- OSTI ID:
- 22883166
- Journal Information:
- Astrophysical Journal, Vol. 805, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Since 2009, the country of publication for this journal is the UK.; ISSN 0004-637X
- Country of Publication:
- United Kingdom
- Language:
- English
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