High-resolution imaging follow-up of doubly imaged quasars
High-resolution imaging follow-up of doubly imaged quasars
复制标题
双成像类星体的高分辨率成像跟踪
DOI:
10.1093/mnras/stab532
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发表时间:
2021
影响因子:
4.8
通讯作者:
Schechter, Paul L
中科院分区:
文献类型:
--
作者:
Shajib, Anowar J;Molina, Eden;Agnello, Adriano;Williams, Peter R;Birrer, Simon;Treu, Tommaso;Fassnacht, Christopher D;Morishita, Takahiro;Abramson, Louis;Schechter, Paul L
We report upon 3 years of follow-up and confirmation of doubly imaged quasar lenses through imaging campaigns from 2016 to 2018 with the Near-Infrared Camera2 (NIRC2) on the W. M. Keck Observatory. A sample of 57 quasar lens candidates are imaged in adaptive-optics-assisted or seeing-limitedK′-band observations. Out of these 57 candidates, 15 are confirmed as lenses. We form a sample of 20 lenses adding in a number of previously known lenses that were imaged with NIRC2 in 2013–14 as part of a pilot study. By modelling these 20 lenses, we obtainK′-band relative photometry and astrometry of the quasar images and the lens galaxy. We also provide the lens properties and predicted time delays to aid planning of follow-up observations necessary for various astrophysical applications, e.g. spectroscopic follow-up to obtain the deflector redshifts for the newly confirmed systems. We compare the departure of the observed flux ratios from the smooth-model predictions between doubly and quadruply imaged quasar systems. We find that the departure is consistent between these two types of lenses if the modelling uncertainty is comparable.
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影响因子:
64.8
作者:
J. Surdej;P. Magain;J. Swings;U. Borgeest;T. Courvoisier;R. Kayser;K. Kellermann;H. Kühr;S. Refsdal
通讯作者:
S. Refsdal
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
N. Morgan;J. Snyder;L. Reens
通讯作者:
L. Reens
影响因子:
4.8
作者:
T. Shanks;N. Metcalfe;B. Chehade;J. Findlay;M. Irwin;E. González-Solares;J. Lewis;A. Yoldas
通讯作者:
T. Shanks;N. Metcalfe;B. Chehade;J. Findlay;M. Irwin;E. González-Solares;J. Lewis;A. Yoldas
DOI:
10.1093/mnrasl/sly043
发表时间:
2018
影响因子:
--
作者:
Williams, P R;Agnello, A;Treu, T;Abramson, L E;Anguita, T;Apostolovski, Y;Chen, G C-F;Fassnacht, C D;Hsueh, J W;Lemaux, B C
通讯作者:
Lemaux, B C
DOI:
--
发表时间:
2006
期刊:
The Astronomical Journal 131・4
影响因子:
--
作者:
Inada;Naohisa;et al.
通讯作者:
et al.