Herschel-ATLAS: modelling the first strong gravitational lenses
Herschel-ATLAS: modelling the first strong gravitational lenses
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DOI：
10.1093/mnras/stu305
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发表时间：
2013-11
影响因子：
4.8
通讯作者：
S. Dye;M. Negrello;R. Hopwood;J. Nightingale;R. Bussmann;R. Bussmann;S. Amber;N. Bourne;A. Cooray;A. Dariush;L. Dunne;S. Eales;J. González-Nuevo;E. Ibar;R. Ivison;S. Maddox;E. Valiante;Matthew W. L. Smith
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文献类型：
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作者：
S. Dye;M. Negrello;R. Hopwood;J. Nightingale;R. Bussmann;R. Bussmann;S. Amber;N. Bourne;A. Cooray;A. Dariush;L. Dunne;S. Eales;J. González-Nuevo;E. Ibar;R. Ivison;S. Maddox;E. Valiante;Matthew W. L. Smith
我们确定了赫歇尔天体物理太赫兹大区域巡天发现的前五个强引力透镜系统的质量密度径向分布。我们提出了一种增强的半线性透镜反演方法的沃伦和染料，它允许同时重建几个不同的波段，并将其应用到双波段成像的镜头与哈勃太空望远镜。这里分析的五个系统的透镜红移范围为0.22 ≤ z ≤ 0.94。结果表明：（1）总质量密度分布的对数斜率随红移的减小而变陡，（2）该斜率与半个有效半径范围内透镜的平均总投影质量密度呈正相关，与有效半径呈负相关;（3）半个有效半径内的暗物质所占的比例随有效半径的增大而增大，随红移的增大而增大。
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. We present an enhancement of the semilinear 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.