Assembling a RELIC at Redshift 1: Spectroscopic Observations of Galaxies in the RELICS Cluster SPT-CLJ0615−5746
Assembling a RELIC at Redshift 1: Spectroscopic Observations of Galaxies in the RELICS Cluster SPT-CLJ0615−5746
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在红移 1 处组装 RELIC：RELICS 星团中星系的光谱观测 SPT-CLJ0615−5746
DOI：
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发表时间：
2019
影响因子：
4.9
通讯作者：
K. Boutsia
中科院分区：
文献类型：
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作者：
T. Connor;D. Kelson;G. Blanc;K. Boutsia
我们提出了再电离透镜星团调查中最远的星团SPT-CLJ0615−5746的光谱红移目录。利用麦哲伦号上的LDSS-3卫星的Nod和Shuffle多缝观测，我们确定了约50个星团成员，并得出了星团红移zc = 0.972，速度色散σ = 1244±162 km s−1。我们使用σ200−M200的标度关系M200 =（9.6±3.5）× 1014 M⊙来计算星团的质量，与之前对该星团的独立质量测量结果一致。此外，考虑到该系统先前的研究，我们研究了SPT-CLJ0615−5746的运动学状态。随着透镜质量和x射线发射的延长，非高斯速度色散随着星团中心半径的增加而增加，以及最亮的星团星系与系统的大部分不静止，有多个星团属性，虽然不是单独引人注目，但结合起来描绘了SPT-CLJ0615−5746目前正在组合的画面。
We present a catalog of spectroscopic redshifts for SPT-CLJ0615−5746, the most distant cluster in the Reionization Lensing Cluster Survey. Using Nod & Shuffle multislit observations with LDSS-3 on Magellan, we identify ∼50 cluster members and derive a cluster redshift of zc = 0.972, with a velocity dispersion of σ = 1244 ± 162 km s−1. We calculate a cluster mass using a σ200 − M200 scaling relation of M200 = (9.6 ± 3.5) × 1014 M⊙, in agreement with previous, independent mass measurements of this cluster. In addition, we examine the kinematic state of SPT-CLJ0615−5746, taking into consideration prior investigations of this system. With an elongated profile in lensing mass and X-ray emission, a non-Gaussian velocity dispersion that increases with clustercentric radius, and a brightest cluster galaxy not at rest with the bulk of the system, there are multiple cluster properties that, while not individually compelling, combine to paint a picture that SPT-CLJ0615−5746 is currently being assembled.
DOI：
10.1088/0067-0049/199/2/25
发表时间：
2011-06
期刊：
The Astrophysical Journal Supplement Series
影响因子：
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作者：
M. Postman;D. Coe;N. Benı́tez;L. Bradley;T. Broadhurst;M. Donahue;H. Ford;O. Graur;G. Graves-G.-G
通讯作者：
M. Postman;D. Coe;N. Benı́tez;L. Bradley;T. Broadhurst;M. Donahue;H. Ford;O. Graur;G. Graves-G.-G