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The Subaru HSC Galaxy Clustering with Photometric Redshift. I. Dark Halo Masses versus Baryonic Properties of Galaxies at 0.3 ≤ z ≤ 1.4
- Source :
- Ishikawa, S, Kashikawa, N, Tanaka, M, Coupon, J, Leauthaud, A, Toshikawa, J, Ichikawa, K, Oogi, T, Uchiyama, H, Niino, Y & Nishizawa, A J 2020, ' The Subaru HSC Galaxy Clustering with Photometric Redshift. I. Dark Halo Masses versus Baryonic Properties of Galaxies at 0.3≤z≤ 1.4 ', The Astrophysical Journal, vol. 904, no. 2, pp. 128 . https://doi.org/10.3847/1538-4357/abbd95
- Publication Year :
- 2020
- Publisher :
- American Astronomical Society, 2020.
-
Abstract
- We present the clustering properties of low-$z$ $(z\leq1.4)$ galaxies selected by the Hyper Suprime-Cam Subaru Strategic Program Wide layer over $145$ deg$^{2}$. The wide-field and multi-wavelength observation yields $5,064,770$ galaxies at $0.3\leq z\leq1.4$ with photometric redshifts and physical properties. This enables the accurate measurement of angular correlation functions and subsequent halo occupation distribution (HOD) analysis allows the connection between baryonic properties and dark halo properties. The fraction of less-massive satellite galaxies at $z\lesssim1$ is found to be almost constant at $\sim20\%$, but it gradually decreases beyond $M_{\star} \sim 10^{10.4}h^{-2}M_{\odot}$. However, the abundance of satellite galaxies at $z>1$ is quite small even for less-massive galaxies due to the rarity of massive centrals at high-$z$. This decreasing trend is connected to the small satellite fraction of Lyman break galaxies at $z>3$. The stellar-to-halo mass ratios at $0.3\leq z\leq1.4$ are almost consistent with the predictions obtained using the latest empirical model; however, we identify small excesses from the theoretical model at the massive end. The pivot halo mass is found to be unchanged at $10^{11.9-12.1}h^{-1}M_{\odot}$ at $0.3\leq z\leq1.4$, and we systematically show that $10^{12}h^{-1}M_{\odot}$ is a universal pivot halo mass up to $z\sim5$ that is derived using only the clustering/HOD analyses. Nevertheless, halo masses with peaked instantaneous baryon conversion efficiencies are much smaller than the pivot halo mass regardless of a redshift, and the most efficient stellar-mass assembly is thought to be in progress in $10^{11.0-11.5}h^{-1}M_{\odot}$ dark haloes.<br />Comment: 33 pages, 16 figures, submitted to ApJ
- Subjects :
- Physics
010308 nuclear & particles physics
Dark matter
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Astrophysics - Astrophysics of Galaxies
01 natural sciences
Galaxy
Dark matter halo
Baryon
Space and Planetary Science
Observational cosmology
0103 physical sciences
Galaxy formation and evolution
Astrophysics::Solar and Stellar Astrophysics
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
Galaxy cluster
Astrophysics - Cosmology and Nongalactic Astrophysics
Photometric redshift
Subjects
Details
- ISSN :
- 15384357
- Volume :
- 904
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....ecbaa8183ab530dc294dafa49e5e3e30