Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-12-03
Mon.Not.Roy.Astron.Soc.406:L1,2010
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
5 pages, MNRAS letters
Scientific paper
10.1111/j.1745-3933.2010.00866.x
We use 62185 quasars from the Sloan Digital Sky Survey (SDSS) DR5 sample to explore the quasar mass-luminosity plane view of virial mass estimation. Previous work shows deviations of ~0.4 dex between virial and reverberation masses. The decline in quasar number density for the highest Eddington ratio quasars at each redshift provides an upper bound of between 0.13 and 0.29 dex for virial mass estimate statistical uncertainties. Across different redshift bins, the maximum possible MgII mass uncertainties average 0.15 dex, while H{\beta} uncertainties average 0.21 dex and CIV uncertainties average 0.27 dex. Any physical spread near the high-Eddington-ratio boundary will produce a more restrictive bound. A comparison of the sub-Eddington boundary slope using H{\beta} and MgII masses finds better agreement with uncorrected MgII masses than with recently proposed corrections. The best agreement for these bright objects is produced by a multiplicative correction by a factor of 1.19, smaller than the factor of 1.8 previously reported as producing the best agreement for the entire SDSS sample.
Elvis Martin
Steinhardt Charles L.
No associations
LandOfFree
The Quasar Mass-Luminosity Plane III: Smaller Errors on Virial Mass Estimates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Quasar Mass-Luminosity Plane III: Smaller Errors on Virial Mass Estimates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Quasar Mass-Luminosity Plane III: Smaller Errors on Virial Mass Estimates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-419777