dc.contributor.author | Geach, J. E. | |
dc.contributor.author | Peacock, J. A. | |
dc.contributor.author | Myers, A. D. | |
dc.contributor.author | Hickox, R. C. | |
dc.contributor.author | Burchard, M. C. | |
dc.contributor.author | Jones, M. L. | |
dc.date.accessioned | 2019-05-16T14:04:37Z | |
dc.date.available | 2019-05-16T14:04:37Z | |
dc.date.issued | 2019-03-27 | |
dc.identifier.citation | Geach , J E , Peacock , J A , Myers , A D , Hickox , R C , Burchard , M C & Jones , M L 2019 , ' The Halo Mass of Optically Luminous Quasars at z ,F≈ ,F1-2 Measured via Gravitational Deflection of the Cosmic Microwave Background ' , The Astrophysical Journal , vol. 874 , no. 1 , 85 , pp. 1-6 . https://doi.org/10.3847/1538-4357/ab0894 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1902.06955v1 | |
dc.identifier.uri | http://hdl.handle.net/2299/21334 | |
dc.description | © 2019. The American Astronomical Society. All rights reserved. | |
dc.description.abstract | We measure the average deflection of cosmic microwave background photons by quasars at 〈Z〉= 1.7. Our sample is selected from the Sloan Digital Sky Survey to cover the redshift range 0.9 ≤z≤2.2 with absolute i-band magnitudes of M i ≤-24 (K-corrected to z = 2). A stack of nearly 200,000 targets reveals an 8δ detection of Planck's estimate of the lensing convergence toward the quasars. We fit the signal with a model comprising a Navarro-Frenk-White density profile and a two-halo term accounting for correlated large-scale structure, which dominates the observed signal. The best-fitting model is described by an average halo mass log 10 (M h h -1 M)12.6 ±0.2 = and linear bias b=2.7±0.3 at 〈Z 〉= 1.7, in excellent agreement with clustering studies. We also report a hint, at a 90% confidence level, of a correlation between the convergence amplitude and luminosity, indicating that quasars brighter than Mi≲ -26 reside in halos of typical mass M h ≈ 10 13 h -1 M, scaling roughly as M h ∞ L opt 3/4 at M i ≲-24 mag, in good agreement with physically motivated quasar demography models. Although we acknowledge that this luminosity dependence is a marginal result, the observed Mh-L opt relationship could be interpreted as a reflection of the cutoff in the distribution of black hole accretion rates toward high Eddington ratios: the weak trend of Mh with Lopt observed at low luminosity becomes stronger for the most powerful quasars, which tend to be accreting close to the Eddington limit. | en |
dc.format.extent | 6 | |
dc.format.extent | 915417 | |
dc.language.iso | eng | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.subject | galaxies: evolution | |
dc.subject | galaxies: halos | |
dc.subject | galaxies: high-redshift | |
dc.subject | large-scale structure of universe | |
dc.subject | quasars: general | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | The Halo Mass of Optically Luminous Quasars at z ,F≈ ,F1-2 Measured via Gravitational Deflection of the Cosmic Microwave Background | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | Centre of Data Innovation Research | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85064446859&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.3847/1538-4357/ab0894 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |