Overconstrained gravitational lens models and the Hubble constant
Overconstrained gravitational lens models and the Hubble constant
复制标题
过度约束的引力透镜模型和哈勃常数
DOI:
10.1093/mnras/staa344
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发表时间:
2020
影响因子:
4.8
通讯作者:
Kochanek, C S
中科院分区:
文献类型:
--
作者:
Kochanek, C S
It is well known that measurements ofH0from gravitational lens time delays scale asH0∝ 1 − κE, where κEis the mean convergence at the Einstein radiusREbut that all available lens data other than the delays provide no direct constraints on κE. The properties of the radial mass distribution constrained by lens data areREand the dimensionless quantity ξ =REα″(RE)/(1 − κE), where α″(RE) is the second derivative of the deflection profile atRE. Lens models with too few degrees of freedom, like power-law models with densities ρ ∝r−n, have a one-to-one correspondence between ξ and κE(for a power-law model, ξ = 2(n− 2) and κE= (3 −n)/2 = (2 − ξ)/4). This means that highly constrained lens models with few parameters quickly lead to very precise but inaccurate estimates of κEand henceH0. Based on experiments with a broad range of plausible dark matter halo models, it is unlikely that any current estimates ofH0from gravitational lens time delays are more accurate than, regardless of the reported precision.
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DOI:
10.1086/304147
发表时间:
1996-10
期刊:
The Astrophysical Journal
影响因子:
--
作者:
T. Kundić;E. Turner;W. Colley;J. Gott;J. Rhoads;J. Rhoads;Yun Wang;L. Bergeron;L. Bergeron;K. Gloria;D. Long;S. Malhotra;J. Wambsganss
通讯作者:
T. Kundić;E. Turner;W. Colley;J. Gott;J. Rhoads;J. Rhoads;Yun Wang;L. Bergeron;L. Bergeron;K. Gloria;D. Long;S. Malhotra;J. Wambsganss
影响因子:
6.5
作者:
O. Wertz;Bastian Orthen;P. Schneider
通讯作者:
P. Schneider
影响因子:
6.5
作者:
P. Schneider;D. Sluse
通讯作者:
D. Sluse
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
F. Courbin;V. Bonvin;E. Buckley;C. Fassnacht;J. Frieman;H. Lin;P. Marshall;S. Suyu;T. Treu;T. Anguita;V. Motta;G. Meylan;E. Paic;M. Tewes;A. Agnello;D. Chao;M. Chijani;D. Gilman;K. Rojas;P. Williams;A. Hempel;S. Kim;R. Lachaume;M. Rabus;T. Abbott;S. Allam;J. Annis;M. Banerji;K. Bechtol;A. Benoit;D. Brooks;D. Burke;A. Rosell;M. Kind;J. Carretero;C. D'Andrea;L. Costa;C. Davis;D. Depoy;S. Desai;B. Flaugher;P. Fosalba;J. García;E. Gaztañaga;D. Goldstein;D. Gruen;R. Gruendl;J. Gschwend;G. Gutiérrez;K. Honscheid;D. James;K. Kuehn;S. Kuhlmann;N. Kuropatkin;O. Lahav;M. Lima;M. Maia;M. March;J. Marshall;R. McMahon;F. Menanteau;R. Miquel;B. Nord;A. Plazas;E. Sánchez;V. Scarpine;R. Schindler;M. Schubnell;I. Sevilla;M. Smith;M. Soares;F. Sobreira;E. Suchyta;G. Tarlé;D. Tucker;A. Walker;W. Wester
通讯作者:
W. Wester
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
J. A. Muñoz;C. S. Kochanek;C. Keeton
通讯作者:
C. Keeton