Herschel-ATLAS: Modelling the first strong gravitational lenses

Дата и время публикации : 2013-11-22T21:00:08Z

Авторы публикации и институты :
S. Dye
M. Negrello
R. Hopwood
J. W. Nightingale
R. S. Bussmann
S. Amber
N. Bourne
A. Cooray
A. Dariush
L. Dunne
S. A. Eales
J. Gonzalez-Nuevo
E. Ibar
R. J. Ivison
S. Maddox
E. Valiante
M. Smith

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 14 pages, submitted to MNRAS
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: We have determined the mass-density radial profiles of the first five strong gravitational lens systems discovered by the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). We present an enhancement of the semi-linear lens inversion method of Warren & Dye which allows simultaneous reconstruction of several different wavebands and apply this to dual-band imaging of the lenses acquired with the Hubble Space Telescope. The five systems analysed here have lens redshifts which span a range, 0.22<z<0.94. Our findings are consistent with other studies by concluding that: 1) the logarithmic slope of the total mass density profile steepens with decreasing redshift; 2) the slope is positively correlated with the average total projected mass density of the lens contained within half the effective radius and negatively correlated with the effective radius; 3) the fraction of dark matter contained within half the effective radius increases with increasing effective radius and increases with redshift.

Category: Physics