We have pioneered a new method for the measurement of extragalactic
distances. This method uses the time-lag between variations in the short
wavelength and long wavelength light from an active galactic nucleus (AGN),
based on a quantitative physical model of dust reverberation that relates the
time-lag to the absolute luminosity of the AGN. We use the large homogeneous
data set from intensive monitoring observations in optical and near-infrared
wavelength bands with the dedicated 2-m MAGNUM telescope to obtain the
distances to 17 AGNs in the redshift range z=0.0024 to z=0.0353. These distance
measurements are compared with distances measured using Cepheid variable stars,
and are used to infer that H\_0= 73 +- 3 (random) km/s/Mpc. The systematic error
in H\_0 is examined, and the uncertainty in the size distribution of dust grains
is the largest source of the systematic error, which is much reduced for a
sample of AGNs for which their parameter values in the model of dust
reverberation are individually measured. This AGN time-lag method can be used
beyond 30 Mpc, the farthest distance reached by extragalactic Cepheids, and can
be extended to high-redshift quasi-stellar objects.
%0 Generic
%1 citeulike:13097952
%A Yoshii, Y.
%A Kobayashi, Y.
%A Minezaki, T.
%A Koshida, S.
%A Peterson, B. A.
%D 2014
%K imported
%T A New Method for Measuring Extragalactic Distances
%U http://arxiv.org/abs/1403.1693
%X We have pioneered a new method for the measurement of extragalactic
distances. This method uses the time-lag between variations in the short
wavelength and long wavelength light from an active galactic nucleus (AGN),
based on a quantitative physical model of dust reverberation that relates the
time-lag to the absolute luminosity of the AGN. We use the large homogeneous
data set from intensive monitoring observations in optical and near-infrared
wavelength bands with the dedicated 2-m MAGNUM telescope to obtain the
distances to 17 AGNs in the redshift range z=0.0024 to z=0.0353. These distance
measurements are compared with distances measured using Cepheid variable stars,
and are used to infer that H\_0= 73 +- 3 (random) km/s/Mpc. The systematic error
in H\_0 is examined, and the uncertainty in the size distribution of dust grains
is the largest source of the systematic error, which is much reduced for a
sample of AGNs for which their parameter values in the model of dust
reverberation are individually measured. This AGN time-lag method can be used
beyond 30 Mpc, the farthest distance reached by extragalactic Cepheids, and can
be extended to high-redshift quasi-stellar objects.
@misc{citeulike:13097952,
abstract = {{We have pioneered a new method for the measurement of extragalactic
distances. This method uses the time-lag between variations in the short
wavelength and long wavelength light from an active galactic nucleus (AGN),
based on a quantitative physical model of dust reverberation that relates the
time-lag to the absolute luminosity of the AGN. We use the large homogeneous
data set from intensive monitoring observations in optical and near-infrared
wavelength bands with the dedicated 2-m MAGNUM telescope to obtain the
distances to 17 AGNs in the redshift range z=0.0024 to z=0.0353. These distance
measurements are compared with distances measured using Cepheid variable stars,
and are used to infer that H\_0= 73 +- 3 (random) km/s/Mpc. The systematic error
in H\_0 is examined, and the uncertainty in the size distribution of dust grains
is the largest source of the systematic error, which is much reduced for a
sample of AGNs for which their parameter values in the model of dust
reverberation are individually measured. This AGN time-lag method can be used
beyond 30 Mpc, the farthest distance reached by extragalactic Cepheids, and can
be extended to high-redshift quasi-stellar objects.}},
added-at = {2019-03-25T08:20:55.000+0100},
archiveprefix = {arXiv},
author = {Yoshii, Y. and Kobayashi, Y. and Minezaki, T. and Koshida, S. and Peterson, B. A.},
biburl = {https://www.bibsonomy.org/bibtex/2dec3cf9e5a0bd1071e05373bbb9fd1db/ericblackman},
citeulike-article-id = {13097952},
citeulike-linkout-0 = {http://arxiv.org/abs/1403.1693},
citeulike-linkout-1 = {http://arxiv.org/pdf/1403.1693},
day = 7,
eprint = {1403.1693},
interhash = {cc45c9171760593bdba576a56af9ecbd},
intrahash = {dec3cf9e5a0bd1071e05373bbb9fd1db},
keywords = {imported},
month = mar,
posted-at = {2014-03-19 17:21:53},
priority = {2},
timestamp = {2019-03-25T08:20:55.000+0100},
title = {{A New Method for Measuring Extragalactic Distances}},
url = {http://arxiv.org/abs/1403.1693},
year = 2014
}