arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.05484astro-ph.GA
收藏

SPIDERS:X射线星系团跟踪和最终光谱数据发布的概述

SPIDERS: overview of the X-ray galaxy cluster follow-up and the final spectroscopic data release

N. Clerc, C. C. Kirkpatrick, A. Finoguenov, R. Capasso, J. Comparat, S. Damsted, K. Furnell, A. E. Kukkola, J. Ider Chitham, A. Merloni, M. Salvato, A. Gueguen,… 展开作者

N. Clerc, C. C. Kirkpatrick, A. Finoguenov, R. Capasso, J. Comparat, S. Damsted, K. Furnell, A. E. Kukkola, J. Ider Chitham, A. Merloni, M. Salvato, A. Gueguen, T. Dwelly, C. Collins, A. Saro, G. Erfanianfar, D. P. Schneider, J. Brownstein, G. A. Mamon, N. Padilla, E. Jullo, D. Bizyaev

摘要:

SPIDERS(eROSITA源的光谱识别)是一个大型光谱计划,用于X射线选定的星系团,作为斯隆数字巡天-IV(SDSS-IV)的一部分。我们描述的SDSS数据发布16(DR 16)的背景下,最终的数据集:调查的总体特征,最终的目标策略,实现的完整性和光谱质量,特别强调其作为宇宙学应用程序的星系团样本的使用。SPIDERS现在包含大约27,000个新的星系光谱,这些光谱是从4,000个测光红色序列中选出的,每个序列都与一个X射线源有关。出色的摄谱仪效率和强大的分析管道使光谱红移测量成功率超过98%,平均速度精度为20 km/s $^{-1}$(在$z=0.2$)。利用DR 16光谱学确认的2,740个X射线星系团的星表,我们揭示了可观测宇宙中直到$z\sim0.6$的星系团分布的三维图。我们强调的均匀性的成员星系光谱之间的星系团相空间的不同区域。借助于精确的光谱红移和样品选择效应模型,我们计算了星系团的X射线光度函数,并指出了它在$z=0.6$之前没有演化.最后,我们讨论了即将到来的大型多路复用光谱计划,致力于跟进下一代的全天空X射线源目录的前景。

英文摘要:

SPIDERS (The SPectroscopic IDentification of eROSITA Sources) is a large spectroscopic programme for X-ray selected galaxy clusters as part of the Sloan Digital Sky Survey-IV (SDSS-IV). We describe the final dataset in the context of SDSS Data Release 16 (DR16): the survey overall characteristics, final targeting strategies, achieved completeness and spectral quality, with special emphasis on its use as a galaxy cluster sample for cosmology applications. SPIDERS now consists of about 27,000 new optical spectra of galaxies selected within 4,000 photometric red sequences, each associated with an X-ray source. The excellent spectrograph efficiency and a robust analysis pipeline yield a spectroscopic redshift measurement success rate exceeding 98%, with a median velocity accuracy of 20 km s$^{-1}$ (at $z=0.2$). Using the catalogue of 2,740 X-ray galaxy clusters confirmed with DR16 spectroscopy, we reveal the three-dimensional map of the galaxy cluster distribution in the observable Universe up to $z\sim0.6$. We highlight the homogeneity of the member galaxy spectra among distinct regions of the galaxy cluster phase space. Aided by accurate spectroscopic redshifts and by a model of the sample selection effects, we compute the galaxy cluster X-ray luminosity function and we present its lack of evolution up to $z=0.6$. Finally we discuss the prospects of forthcoming large multiplexed spectroscopic programmes dedicated to follow up the next generation of all-sky X-ray source catalogues.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑