GALAXY CRUISE: Spiral and ring classifications for bright galaxies at z=0.01-0.3
arxiv(2023)
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.
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