Subaru Hyper Suprime-Cam revisits the large-scale environmental dependence on galaxy morphology over 360 deg2 at z = 0.3–0.6
Abstract
Abstract This study investigates the role of large-scale environments on the fraction of spiral galaxies at z = 0.3–0.6 sliced to three redshift bins of Δz = 0.1. Here, we sample 276220 massive galaxies in a limited stellar mass of 5 × 1010 solar mass (∼M*) over 360 deg2, as obtained from the Second Public Data Release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). By combining projected two-dimensional density information (Shimakawa et al. 2021, MNRAS, 503, 3896) and the CAMIRA cluster catalog (Oguri et al. 2018, PASJ, 70, S20), we investigate the spiral fraction across large-scale overdensities and in the vicinity of red sequence clusters. We adopt transfer learning to reduce the cost of labeling spiral galaxies significantly and then perform stacking analysis across the entire field to overcome the limitations of sample size. Here we employ a morphological classification catalog by the Galaxy Zoo Hubble (Willett et al., 2017, MNRAS, 464, 4176) to train the deep learning model. Based on 74103 sources classified as spirals, we find moderate morphology–density relations on a 10 comoving Mpc scale, thanks to the wide-field coverage of HSC-SSP. Clear deficits of spiral galaxies have also been confirmed, in and around 1136 red sequence clusters. Furthermore, we verifymore »
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1826839
- Resource Type:
- Published Article
- Journal Name:
- Publications of the Astronomical Society of Japan
- Additional Journal Information:
- Journal Name: Publications of the Astronomical Society of Japan Journal Volume: 73 Journal Issue: 6; Journal ID: ISSN 0004-6264
- Publisher:
- Oxford University Press
- Country of Publication:
- Japan
- Language:
- English
Citation Formats
Shimakawa, Rhythm, Tanaka, Takumi S., Toshikage, Seiji, and Tanaka, Masayuki. Subaru Hyper Suprime-Cam revisits the large-scale environmental dependence on galaxy morphology over 360 deg2 at z = 0.3–0.6. Japan: N. p., 2021.
Web. doi:10.1093/pasj/psab097.
Shimakawa, Rhythm, Tanaka, Takumi S., Toshikage, Seiji, & Tanaka, Masayuki. Subaru Hyper Suprime-Cam revisits the large-scale environmental dependence on galaxy morphology over 360 deg2 at z = 0.3–0.6. Japan. https://doi.org/10.1093/pasj/psab097
Shimakawa, Rhythm, Tanaka, Takumi S., Toshikage, Seiji, and Tanaka, Masayuki. Wed .
"Subaru Hyper Suprime-Cam revisits the large-scale environmental dependence on galaxy morphology over 360 deg2 at z = 0.3–0.6". Japan. https://doi.org/10.1093/pasj/psab097.
@article{osti_1826839,
title = {Subaru Hyper Suprime-Cam revisits the large-scale environmental dependence on galaxy morphology over 360 deg2 at z = 0.3–0.6},
author = {Shimakawa, Rhythm and Tanaka, Takumi S. and Toshikage, Seiji and Tanaka, Masayuki},
abstractNote = {Abstract This study investigates the role of large-scale environments on the fraction of spiral galaxies at z = 0.3–0.6 sliced to three redshift bins of Δz = 0.1. Here, we sample 276220 massive galaxies in a limited stellar mass of 5 × 1010 solar mass (∼M*) over 360 deg2, as obtained from the Second Public Data Release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). By combining projected two-dimensional density information (Shimakawa et al. 2021, MNRAS, 503, 3896) and the CAMIRA cluster catalog (Oguri et al. 2018, PASJ, 70, S20), we investigate the spiral fraction across large-scale overdensities and in the vicinity of red sequence clusters. We adopt transfer learning to reduce the cost of labeling spiral galaxies significantly and then perform stacking analysis across the entire field to overcome the limitations of sample size. Here we employ a morphological classification catalog by the Galaxy Zoo Hubble (Willett et al., 2017, MNRAS, 464, 4176) to train the deep learning model. Based on 74103 sources classified as spirals, we find moderate morphology–density relations on a 10 comoving Mpc scale, thanks to the wide-field coverage of HSC-SSP. Clear deficits of spiral galaxies have also been confirmed, in and around 1136 red sequence clusters. Furthermore, we verify whether there is a large-scale environmental dependence on rest-frame u − r colors of spiral galaxies; such a tendency was not observed in our sample.},
doi = {10.1093/pasj/psab097},
journal = {Publications of the Astronomical Society of Japan},
number = 6,
volume = 73,
place = {Japan},
year = {2021},
month = {10}
}
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