Gravitational Lensing and Dynamics (GLaD): combined analysis to unveil properties of high-redshift galaxies
Gravitational Lensing and Dynamics (GLaD): combined analysis to unveil properties of high-redshift galaxies
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引力透镜和动力学 (GLaD)：综合分析揭示高红移星系的特性
DOI：
10.1051/0004-6361/202037929
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发表时间：
2020
影响因子：
6.5
通讯作者：
A. Halkola
中科院分区：
文献类型：
--
作者：
G. Chirivì;A. Yıldırım;S. Suyu;A. Halkola
积分场单位(IFU)恒星运动学的动力学模拟是揭示星系在局部宇宙中的动力学结构和质量积累的有力工具，而引力透镜是自然界探索局部宇宙以外星系性质的宇宙望远镜。我们提出了一种新的方法，它将星系的动力学模型与强引力透镜的放大能力相结合，来重建高红移星系的结构和动力学性质。通过轴对称Jeans模型，我们建立了源星系的动力学模型，假设表面亮度和表面质量密度分布。然后，我们预测光源的表面亮度和运动学在前景质量分布的透镜下会是什么样子，并与强引力透镜系统的模拟观测弧线进行比较。出于演示目的，我们创建并分析了强透镜系统RX J1131−1231的模拟数据。通过对透镜和光源的建模，我们在5%的不确定度内恢复了强透镜高红移源有效半径内的动力学质量，并且改进了对透镜质量参数的约束高达50%。这种机器特别适合于未来通过大型分段镜望远镜进行观测，例如詹姆斯·韦伯太空望远镜，它将为研究遥远和微弱的星系提供高灵敏度和角分辨率的IFU数据。
The dynamical modelling of integral field unit (IFU) stellar kinematics is a powerful tool to unveil the dynamical structure and mass build-up of galaxies in the local Universe, while gravitational lensing is nature’s cosmic telescope to explore the properties of galaxies beyond the local Universe. We present a new approach, which unifies dynamical modelling of galaxies with the magnification power of strong gravitational lensing, to reconstruct the structural and dynamical properties of high-redshift galaxies. By means of axisymmetric Jeans modelling, we create a dynamical model of the source galaxy, assuming a surface brightness and surface mass density profile. We then predict how the source’s surface brightness and kinematics would look when lensed by the foreground mass distribution and compare with the mock observed arcs of strong gravitational lensing systems. For demonstration purposes, we created and also analysed mock data of the strong lensing system RX J1131−1231. By modelling both the lens and source, we recover the dynamical mass within the effective radius of strongly lensed high-redshift sources within 5% uncertainty, and we improve the constraints on the lens mass parameters by up to 50%. This machinery is particularly well-suited for future observations from large segmented-mirror telescopes, such as the James Webb Space Telescope, which will yield high sensitivity and angular-resolution IFU data for studies on distant and faint galaxies.
DOI：
10.1111/j.1365-2966.2008.13754.x
发表时间：
2008-05
影响因子：
4.8
作者：
M. Cappellari
通讯作者：
M. Cappellari
DOI：
10.1088/0004-637x/695/2/1577
发表时间：
2009-01
期刊：
The Astrophysical Journal
影响因子：
--
作者：
K. Gultekin;D. Richstone;K. Gebhardt;T. Lauer;J. Pinkney;M. Aller;R. Bender;A. Dressler;S. Faber;A. Filippenko;R. Green;L. Ho;J. Kormendy;C. N. D. O. Astronomy;U. Michigan;D. O. Astronomy;U. Texas;National Optical Astronomy Observatory;D. Physics;Astronomy;O. University;I. O. Astronomy;E. Zurich;Universitaets-Sternwarte der Ludwig-Maximilians-Universitat-Universitaets-Sternwarte-der-1389730712;Observatories of the Carnegie Institution of Washington-Observatories-of-the-Carnegie-Institution-of-102702111;U. Observatory;B. G. D. O. Astronomy;Astrophysics;U. California;Santa Cruz;Berkeley;L. Observatory;U. Arizona;I. d'Astrophysique;Universit́e Libre de Bruxelles
通讯作者：
K. Gultekin;D. Richstone;K. Gebhardt;T. Lauer;J. Pinkney;M. Aller;R. Bender;A. Dressler;S. Faber;A. Filippenko;R. Green;L. Ho;J. Kormendy;C. N. D. O. Astronomy;U. Michigan;D. O. Astronomy;U. Texas;National Optical Astronomy Observatory;D. Physics;Astronomy;O. University;I. O. Astronomy;E. Zurich;Universitaets-Sternwarte der Ludwig-Maximilians-Universitat-Universitaets-Sternwarte-der-1389730712;Observatories of the Carnegie Institution of Washington-Observatories-of-the-Carnegie-Institution-of-102702111;U. Observatory;B. G. D. O. Astronomy;Astrophysics;U. California;Santa Cruz;Berkeley;L. Observatory;U. Arizona;I. d'Astrophysique;Universit́e Libre de Bruxelles