The orientation of the disk of material accreting onto supermassive black
holes that power quasars is one of most important quantities that are needed to
understand quasars -- both individually and in the ensemble average. We present
a hypothesis for determining comparatively edge-on orientation in a subset of
quasars (both radio loud and radio quiet). If confirmed, this orientation
indicator could be applicable to individual quasars without reference to radio
or X-ray data and could identify some 10-20% of quasars as being more edge-on
than average, based only on moderate resolution and signal-to-noise
spectroscopy covering the CIV 1549A emission feature. We present a test of said
hypothesis using X-ray observations and identify additional data that are
needed to confirm this hypothesis and calibrate the metric.
%0 Generic
%1 richards2021novel
%A Richards, Gordon T.
%A Plotkin, Richard M.
%A Hewett, Paul C.
%A Rankine, Amy L.
%A Rivera, Angelica B.
%A Shen, Yue
%A Shemmer, Ohad
%D 2021
%K library
%T A Novel Test of Quasar Orientation
%U http://arxiv.org/abs/2106.02633
%X The orientation of the disk of material accreting onto supermassive black
holes that power quasars is one of most important quantities that are needed to
understand quasars -- both individually and in the ensemble average. We present
a hypothesis for determining comparatively edge-on orientation in a subset of
quasars (both radio loud and radio quiet). If confirmed, this orientation
indicator could be applicable to individual quasars without reference to radio
or X-ray data and could identify some 10-20% of quasars as being more edge-on
than average, based only on moderate resolution and signal-to-noise
spectroscopy covering the CIV 1549A emission feature. We present a test of said
hypothesis using X-ray observations and identify additional data that are
needed to confirm this hypothesis and calibrate the metric.
@misc{richards2021novel,
abstract = {The orientation of the disk of material accreting onto supermassive black
holes that power quasars is one of most important quantities that are needed to
understand quasars -- both individually and in the ensemble average. We present
a hypothesis for determining comparatively edge-on orientation in a subset of
quasars (both radio loud and radio quiet). If confirmed, this orientation
indicator could be applicable to individual quasars without reference to radio
or X-ray data and could identify some 10-20% of quasars as being more edge-on
than average, based only on moderate resolution and signal-to-noise
spectroscopy covering the CIV 1549A emission feature. We present a test of said
hypothesis using X-ray observations and identify additional data that are
needed to confirm this hypothesis and calibrate the metric.},
added-at = {2021-06-07T08:09:07.000+0200},
author = {Richards, Gordon T. and Plotkin, Richard M. and Hewett, Paul C. and Rankine, Amy L. and Rivera, Angelica B. and Shen, Yue and Shemmer, Ohad},
biburl = {https://www.bibsonomy.org/bibtex/2fe6355b25c1b56563b700487be330c8e/gpkulkarni},
description = {A Novel Test of Quasar Orientation},
interhash = {dcdd433d734e96104c59f592dd2a8d96},
intrahash = {fe6355b25c1b56563b700487be330c8e},
keywords = {library},
note = {cite arxiv:2106.02633Comment: 7 pages, 2 figures, accepted for publication in ApJL},
timestamp = {2021-06-07T08:09:07.000+0200},
title = {A Novel Test of Quasar Orientation},
url = {http://arxiv.org/abs/2106.02633},
year = 2021
}