arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2309.14830astro-ph.GA
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GALAXY CRUISE:z=0.01-0.3亮星系的螺旋与环状结构分类

GALAXY CRUISE: Spiral and ring classifications for bright galaxies at z=0.01-0.3

Rhythm Shimakawa, Masayuki Tanaka, Kei Ito, Makoto Ando

AI总结:

本文基于HSC-SSP数据,利用深度学习对z=0.01-0.3的星系进行螺旋与环状结构分类,构建了包含数万源的形态星表,并发现两者在恒星质量与星系团中心距离上呈现不同分布特征。

摘要:

本文基于Hyper Suprime-Cam Subaru Strategic Program的第三次公开数据发布,构建了一个涵盖z=0.01-0.3范围内59,854个星等受限星系(r<17.8 mag,以及r降至20 mag的额外628,005个子样本)的螺旋与环状特征形态分类星表。我们采用两个深度学习分类器,基于专门处理Hyper Suprime-Cam数据的GALAXY CRUISE数据发布1,分别判定螺旋与环状结构。螺旋与环状星系分别包含31,864和8,808个源,占样本的53%和15%。本研究的一项显著成果是利用Subaru Hyper Suprime-Cam提供的高质量成像数据,构建了大型环状星系样本。然而,在有限的视宁度分辨率下,准确识别环状星系仍具挑战。此外,我们确认大多数螺旋星系位于恒星形成主序上,而环状星系优先位于恒星质量为10^10.5-10^11太阳质量的绿谷中。进一步观察到,朝向星系团中心,螺旋与环状星系的比例呈下降趋势。所获取的形态星表已在GALAXY CRUISE网站公开。

英文摘要:

This paper presents a morphology classification catalog of spiral and ring features of 59,854 magnitude-limited galaxies ($r<17.8$ mag, and additional 628,005 subsamples down to $r=20$ mag) at $z=0.01-0.3$ based on the Third Public Data Release of the Hyper Suprime-Cam Subaru Strategic Program. We employ two deep learning classifiers to determine the spiral and ring structures separately based on GALAXY CRUISE Data Release 1, which is dedicated to Hyper Suprime-Cam data. The number of spiral and ring galaxies contain 31,864 and 8,808 sources, respectively, which constitute 53\% and 15\% of the sample. A notable result of this study is the construction of a large sample of ring galaxies utilizing high-quality imaging data delivered by the Subaru Hyper Suprime-Cam. However, the accurate identification of ring galaxies remains difficult at a limited seeing resolution. Additionally, we confirm that most spiral galaxies are located on the star-forming main sequence, whereas ring galaxies preferentially reside in the green valley at stellar mass of $10^{10.5}-10^{11}$ solar mass. Furthermore, decreasing fractions of spiral and ring galaxies are observed toward the centers of the galaxy clusters. The obtained morphology catalog is publicly available on the GALAXY CRUISE website.

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。

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