SIMBAD references

2017ApJ...838...41J - Astrophys. J., 838, 41-41 (2017/March-3)

The most massive active galactic nuclei at 1 <= z <= 2.

JUN H.D., IM M., KIM D. and STERN D.

Abstract (from CDS):

We obtained near-infrared spectra of 26 Sloan Digital Sky Survey quasars at 0.7 z 2.5 with reported rest-frame ultraviolet MBH ∼ 1010 M to critically examine the systematic effects involved with their mass estimations. We find that active galactic nuclei (AGNs) heavier than 1010 M often display double-peaked Hα emission, extremely broad Fe II complex emission around Mg II, and highly blueshifted and broadened C IV emission. The weight of this evidence, combined with previous studies, cautions against the use of MBH values based on any emission line with a width over 8000 km s–1. Also, the MBH estimations are not positively biased by the presence of ionized narrow line outflows, anisotropic radiation, or the use of line FWHM instead of σ for our sample, and unbiased with variability, scatter in broad line equivalent width, or obscuration for general type-1 quasars. Removing the systematically uncertain MBH values, ∼1010 M black holes (BHs) in 1 <= z <= 2 AGNs can still be explained by anisotropic motion of the broad line region from ∼109.5 M BHs, although current observations support that they are intrinsically most massive, and overmassive to the host's bulge mass.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: active - galaxies: evolution - quasars: supermassive black holes - quasars: supermassive black holes

Status at CDS:  

Simbad objects: 29

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2020.04.01-21:53:02

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