GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg2 area corresponding to 1 Gpc3

Yuichi Harikane; Masami Ouchi; Yoshiaki Ono; Shun Saito; Peter Behroozi; Surhud More; Kazuhiro Shimasaku; Jun Toshikawa; Yen Ting Lin; Masayuki Akiyama; Jean Coupon; Yutaka Komiyama; Akira Konno; Sheng Chieh Lin; Satoshi Miyazaki; Atsushi J. Nishizawa; Takatoshi Shibuya; John Silverman

doi:10.1093/pasj/psx097

GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg² area corresponding to 1 Gpc³

Yuichi Harikane, Masami Ouchi, Yoshiaki Ono, Shun Saito, Peter Behroozi, Surhud More, Kazuhiro Shimasaku, Jun Toshikawa, Yen Ting Lin, Masayuki Akiyama, Jean Coupon, Yutaka Komiyama, Akira Konno, Sheng Chieh Lin, Satoshi Miyazaki, Atsushi J. Nishizawa, Takatoshi Shibuya, John Silverman

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111 Scopus citations

Abstract

We present clustering properties from 579492 Lyman-break galaxies (LBGs) at z ∼ 4-6 over the 100 deg² sky (corresponding to a 1.4 Gpc³ volume) identified in early data of the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.We derive angular correlation functions (ACFs) for the HSC LBGs with unprecedentedly high statistical accuracies at z ∼ 4-6, and compare them with the halo occupation distribution (HOD) models. We clearly identify significant ACF excesses in 10 < θ < 90, the transition scale between one- and two-halo terms, suggestive of the existence of the non-linear halo bias effect. Combining the HOD models and previous clustering measurements of faint LBGs at z ∼ 4-7, we investigate the dark matter halo mass (Mh) of the z ∼ 4-7 LBGs and its correlation with various physical properties including the star formation rate (SFR), the stellar-to-halo mass ratio (SHMR), and the dark matter accretion rate (M_h) over a wide mass range of M_h/M = 4 × 10¹⁰-4 × 10¹². We find that the SHMR increases from z ∼ 4 to 7 by a factor of ∼4 at M_h - 1 × 10¹¹M, while the SHMR shows no strong evolution in the similar redshift range at M_h - 1 × 10¹²M. Interestingly, we identify a tight relation of SFR/M_h-M_h showing no significant evolution beyond 0.15 dex in this wide mass range over z ∼ 4-7. This weak evolution suggests that the SFR/M_h-M_h relation is a fundamental relation in high-redshift galaxy formation whose star formation activities are regulated by the dark matter mass assembly. Assuming this fundamental relation, we calculate the cosmic star formation rate densities (SFRDs) over z = 0-10 (a.k.a. the Madau-Lilly plot). The cosmic SFRD evolution based on the fundamental relation agrees with the one obtained by observations, suggesting that the cosmic SFRD increase from z ∼ 10 to 4 - 2 (decrease from z ∼ 4-2 to 0) is mainly driven by the increase of the halo abundance (the decrease of the accretion rate).

Original language	English (US)
Article number	S11
Journal	Publications of the Astronomical Society of Japan
Volume	70
Issue number	Special Issue 1
DOIs	https://doi.org/10.1093/pasj/psx097
State	Published - Jan 1 2018
Externally published	Yes

Keywords

Evolution-galaxies
Formation-galaxies
Galaxies
High-redshift

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1093/pasj/psx097

Cite this

Harikane, Y., Ouchi, M., Ono, Y., Saito, S., Behroozi, P., More, S., Shimasaku, K., Toshikawa, J., Lin, Y. T., Akiyama, M., Coupon, J., Komiyama, Y., Konno, A., Lin, S. C., Miyazaki, S., Nishizawa, A. J., Shibuya, T., & Silverman, J. (2018). GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg² area corresponding to 1 Gpc³. Publications of the Astronomical Society of Japan, 70(Special Issue 1), Article S11. https://doi.org/10.1093/pasj/psx097

Harikane, Y, Ouchi, M, Ono, Y, Saito, S, Behroozi, P, More, S, Shimasaku, K, Toshikawa, J, Lin, YT, Akiyama, M, Coupon, J, Komiyama, Y, Konno, A, Lin, SC, Miyazaki, S, Nishizawa, AJ, Shibuya, T & Silverman, J 2018, 'GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg² area corresponding to 1 Gpc³', Publications of the Astronomical Society of Japan, vol. 70, no. Special Issue 1, S11. https://doi.org/10.1093/pasj/psx097

@article{c10970e9ffb0470481fbb92312af5bd3,

title = "GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg2 area corresponding to 1 Gpc3",

abstract = "We present clustering properties from 579492 Lyman-break galaxies (LBGs) at z ∼ 4-6 over the 100 deg2 sky (corresponding to a 1.4 Gpc3 volume) identified in early data of the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.We derive angular correlation functions (ACFs) for the HSC LBGs with unprecedentedly high statistical accuracies at z ∼ 4-6, and compare them with the halo occupation distribution (HOD) models. We clearly identify significant ACF excesses in 10 < θ < 90, the transition scale between one- and two-halo terms, suggestive of the existence of the non-linear halo bias effect. Combining the HOD models and previous clustering measurements of faint LBGs at z ∼ 4-7, we investigate the dark matter halo mass (Mh) of the z ∼ 4-7 LBGs and its correlation with various physical properties including the star formation rate (SFR), the stellar-to-halo mass ratio (SHMR), and the dark matter accretion rate (Mh) over a wide mass range of Mh/M = 4 × 1010-4 × 1012. We find that the SHMR increases from z ∼ 4 to 7 by a factor of ∼4 at Mh - 1 × 1011M, while the SHMR shows no strong evolution in the similar redshift range at Mh - 1 × 1012M. Interestingly, we identify a tight relation of SFR/Mh-Mh showing no significant evolution beyond 0.15 dex in this wide mass range over z ∼ 4-7. This weak evolution suggests that the SFR/Mh-Mh relation is a fundamental relation in high-redshift galaxy formation whose star formation activities are regulated by the dark matter mass assembly. Assuming this fundamental relation, we calculate the cosmic star formation rate densities (SFRDs) over z = 0-10 (a.k.a. the Madau-Lilly plot). The cosmic SFRD evolution based on the fundamental relation agrees with the one obtained by observations, suggesting that the cosmic SFRD increase from z ∼ 10 to 4 - 2 (decrease from z ∼ 4-2 to 0) is mainly driven by the increase of the halo abundance (the decrease of the accretion rate).",

keywords = "Evolution-galaxies, Formation-galaxies, Galaxies, High-redshift",

author = "Yuichi Harikane and Masami Ouchi and Yoshiaki Ono and Shun Saito and Peter Behroozi and Surhud More and Kazuhiro Shimasaku and Jun Toshikawa and Lin, {Yen Ting} and Masayuki Akiyama and Jean Coupon and Yutaka Komiyama and Akira Konno and Lin, {Sheng Chieh} and Satoshi Miyazaki and Nishizawa, {Atsushi J.} and Takatoshi Shibuya and John Silverman",

year = "2018",

month = jan,

day = "1",

doi = "10.1093/pasj/psx097",

language = "English (US)",

volume = "70",

journal = "Publications of the Astronomical Society of Japan",

issn = "0004-6264",

publisher = "Oxford University Press",

number = "Special Issue 1",

}

TY - JOUR

T1 - GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg2 area corresponding to 1 Gpc3

AU - Harikane, Yuichi

AU - Ouchi, Masami

AU - Ono, Yoshiaki

AU - Saito, Shun

AU - Behroozi, Peter

AU - More, Surhud

AU - Shimasaku, Kazuhiro

AU - Toshikawa, Jun

AU - Lin, Yen Ting

AU - Akiyama, Masayuki

AU - Coupon, Jean

AU - Komiyama, Yutaka

AU - Konno, Akira

AU - Lin, Sheng Chieh

AU - Miyazaki, Satoshi

AU - Nishizawa, Atsushi J.

AU - Shibuya, Takatoshi

AU - Silverman, John

PY - 2018/1/1

Y1 - 2018/1/1

N2 - We present clustering properties from 579492 Lyman-break galaxies (LBGs) at z ∼ 4-6 over the 100 deg2 sky (corresponding to a 1.4 Gpc3 volume) identified in early data of the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.We derive angular correlation functions (ACFs) for the HSC LBGs with unprecedentedly high statistical accuracies at z ∼ 4-6, and compare them with the halo occupation distribution (HOD) models. We clearly identify significant ACF excesses in 10 < θ < 90, the transition scale between one- and two-halo terms, suggestive of the existence of the non-linear halo bias effect. Combining the HOD models and previous clustering measurements of faint LBGs at z ∼ 4-7, we investigate the dark matter halo mass (Mh) of the z ∼ 4-7 LBGs and its correlation with various physical properties including the star formation rate (SFR), the stellar-to-halo mass ratio (SHMR), and the dark matter accretion rate (Mh) over a wide mass range of Mh/M = 4 × 1010-4 × 1012. We find that the SHMR increases from z ∼ 4 to 7 by a factor of ∼4 at Mh - 1 × 1011M, while the SHMR shows no strong evolution in the similar redshift range at Mh - 1 × 1012M. Interestingly, we identify a tight relation of SFR/Mh-Mh showing no significant evolution beyond 0.15 dex in this wide mass range over z ∼ 4-7. This weak evolution suggests that the SFR/Mh-Mh relation is a fundamental relation in high-redshift galaxy formation whose star formation activities are regulated by the dark matter mass assembly. Assuming this fundamental relation, we calculate the cosmic star formation rate densities (SFRDs) over z = 0-10 (a.k.a. the Madau-Lilly plot). The cosmic SFRD evolution based on the fundamental relation agrees with the one obtained by observations, suggesting that the cosmic SFRD increase from z ∼ 10 to 4 - 2 (decrease from z ∼ 4-2 to 0) is mainly driven by the increase of the halo abundance (the decrease of the accretion rate).

AB - We present clustering properties from 579492 Lyman-break galaxies (LBGs) at z ∼ 4-6 over the 100 deg2 sky (corresponding to a 1.4 Gpc3 volume) identified in early data of the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.We derive angular correlation functions (ACFs) for the HSC LBGs with unprecedentedly high statistical accuracies at z ∼ 4-6, and compare them with the halo occupation distribution (HOD) models. We clearly identify significant ACF excesses in 10 < θ < 90, the transition scale between one- and two-halo terms, suggestive of the existence of the non-linear halo bias effect. Combining the HOD models and previous clustering measurements of faint LBGs at z ∼ 4-7, we investigate the dark matter halo mass (Mh) of the z ∼ 4-7 LBGs and its correlation with various physical properties including the star formation rate (SFR), the stellar-to-halo mass ratio (SHMR), and the dark matter accretion rate (Mh) over a wide mass range of Mh/M = 4 × 1010-4 × 1012. We find that the SHMR increases from z ∼ 4 to 7 by a factor of ∼4 at Mh - 1 × 1011M, while the SHMR shows no strong evolution in the similar redshift range at Mh - 1 × 1012M. Interestingly, we identify a tight relation of SFR/Mh-Mh showing no significant evolution beyond 0.15 dex in this wide mass range over z ∼ 4-7. This weak evolution suggests that the SFR/Mh-Mh relation is a fundamental relation in high-redshift galaxy formation whose star formation activities are regulated by the dark matter mass assembly. Assuming this fundamental relation, we calculate the cosmic star formation rate densities (SFRDs) over z = 0-10 (a.k.a. the Madau-Lilly plot). The cosmic SFRD evolution based on the fundamental relation agrees with the one obtained by observations, suggesting that the cosmic SFRD increase from z ∼ 10 to 4 - 2 (decrease from z ∼ 4-2 to 0) is mainly driven by the increase of the halo abundance (the decrease of the accretion rate).

KW - Evolution-galaxies

KW - Formation-galaxies

KW - Galaxies

KW - High-redshift

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U2 - 10.1093/pasj/psx097

DO - 10.1093/pasj/psx097

M3 - Article

AN - SCOPUS:85041662829

SN - 0004-6264

VL - 70

JO - Publications of the Astronomical Society of Japan

JF - Publications of the Astronomical Society of Japan

IS - Special Issue 1

M1 - S11

ER -