SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies

Yuichi Harikane; Masami Ouchi; Yoshiaki Ono; Seiji Fujimoto; Darko Donevski; Takatoshi Shibuya; Andreas L. Faisst; Tomotsugu Goto; Bunyo Hatsukade; Nobunari Kashikawa; Kotaro Kohno; Takuya Hashimoto; Ryo Higuchi; Akio K. Inoue; Yen-Ting Lin; Crystal L. Martin; Roderik Overzier; Ian Smail; Jun Toshikawa; Hideki Umehata; Yiping Ao; Scott Chapman; David L. Clements; Myungshin Im; Yipeng Jing; Toshihiro Kawaguchi; Chien-Hsiu Lee; Minju M. Lee; Lihwai Lin; Yoshiki Matsuoka; Murilo Marinello; Tohru Nagao; Masato Onodera; Sune Toft; Wei-Hao Wang

doi:10.3847/1538-4357/ab2cd5

SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies

Yuichi Harikane, Masami Ouchi, Yoshiaki Ono, Seiji Fujimoto, Darko Donevski, Takatoshi Shibuya, Andreas L. Faisst, Tomotsugu Goto, Bunyo Hatsukade, Nobunari Kashikawa, Kotaro Kohno, Takuya Hashimoto, Ryo Higuchi, Akio K. Inoue, Yen-Ting Lin, Crystal L. Martin, Roderik Overzier, Ian Smail, Jun Toshikawa, Hideki UmehataYiping Ao, Scott Chapman, David L. Clements, Myungshin Im, Yipeng Jing, Toshihiro Kawaguchi, Chien-Hsiu Lee, Minju M. Lee, Lihwai Lin, Yoshiki Matsuoka, Murilo Marinello, Tohru Nagao, Masato Onodera, Sune Toft, Wei-Hao Wang

The Cosmic Dawn Center

25 Citations (Scopus)

Abstract

We have obtained three-dimensional maps of the universe in ∼200 × 200 × 80 comoving Mpc³ (cMpc³) volumes each at z = 5.7 and 6.6 based on a spectroscopic sample of 179 galaxies that achieves ⪆80% completeness down to the Lyα luminosity of, based on our Keck and Gemini observations and the literature. The maps reveal filamentary large-scale structures and two remarkable overdensities made out of at least 44 and 12 galaxies at z = 5.692 (z57OD) and z = 6.585 (z66OD), respectively, making z66OD the most distant overdensity spectroscopically confirmed to date, with >10 spectroscopically confirmed galaxies. We compare spatial distributions of submillimeter galaxies at z ≃ 4-6 with our z = 5.7 galaxies forming the large-scale structures, and detect a 99.97% signal of cross-correlation, indicative of a clear coincidence of dusty star-forming galaxy and dust-unobscured galaxy formation at this early epoch. The galaxies in z57OD and z66OD are actively forming stars with star-formation rates (SFRs) ⪆5 times higher than the main sequence, and particularly the SFR density in z57OD is 10 times higher than the cosmic average at the redshift (a.k.a. the Madau-Lilly plot).

Original language	English
Article number	142
Journal	Astrophysical Journal
Volume	883
Issue number	2
ISSN	0004-637X
DOIs	https://doi.org/10.3847/1538-4357/ab2cd5
Publication status	Published - 1 Oct 2019

Keywords

galaxies: evolution
galaxies: formation
galaxies: high-redshift

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Harikane, Y., Ouchi, M., Ono, Y., Fujimoto, S., Donevski, D., Shibuya, T., Faisst, A. L., Goto, T., Hatsukade, B., Kashikawa, N., Kohno, K., Hashimoto, T., Higuchi, R., Inoue, A. K., Lin, Y.-T., Martin, C. L., Overzier, R., Smail, I., Toshikawa, J., ... Wang, W.-H. (2019). SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies. Astrophysical Journal, 883(2), Article 142. https://doi.org/10.3847/1538-4357/ab2cd5

SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies. / Harikane, Yuichi; Ouchi, Masami; Ono, Yoshiaki et al.
In: Astrophysical Journal, Vol. 883, No. 2, 142, 01.10.2019.

Research output: Contribution to journal › Journal article › Research › peer-review

Harikane, Y, Ouchi, M, Ono, Y, Fujimoto, S, Donevski, D, Shibuya, T, Faisst, AL, Goto, T, Hatsukade, B, Kashikawa, N, Kohno, K, Hashimoto, T, Higuchi, R, Inoue, AK, Lin, Y-T, Martin, CL, Overzier, R, Smail, I, Toshikawa, J, Umehata, H, Ao, Y, Chapman, S, Clements, DL, Im, M, Jing, Y, Kawaguchi, T, Lee, C-H, Lee, MM, Lin, L, Matsuoka, Y, Marinello, M, Nagao, T, Onodera, M, Toft, S & Wang, W-H 2019, 'SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies', Astrophysical Journal, vol. 883, no. 2, 142. https://doi.org/10.3847/1538-4357/ab2cd5

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title = "SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies",

abstract = "We have obtained three-dimensional maps of the universe in ∼200 × 200 × 80 comoving Mpc3 (cMpc3) volumes each at z = 5.7 and 6.6 based on a spectroscopic sample of 179 galaxies that achieves ⪆80% completeness down to the Lyα luminosity of, based on our Keck and Gemini observations and the literature. The maps reveal filamentary large-scale structures and two remarkable overdensities made out of at least 44 and 12 galaxies at z = 5.692 (z57OD) and z = 6.585 (z66OD), respectively, making z66OD the most distant overdensity spectroscopically confirmed to date, with >10 spectroscopically confirmed galaxies. We compare spatial distributions of submillimeter galaxies at z ≃ 4-6 with our z = 5.7 galaxies forming the large-scale structures, and detect a 99.97% signal of cross-correlation, indicative of a clear coincidence of dusty star-forming galaxy and dust-unobscured galaxy formation at this early epoch. The galaxies in z57OD and z66OD are actively forming stars with star-formation rates (SFRs) ⪆5 times higher than the main sequence, and particularly the SFR density in z57OD is 10 times higher than the cosmic average at the redshift (a.k.a. the Madau-Lilly plot).",

keywords = "galaxies: evolution, galaxies: formation, galaxies: high-redshift",

author = "Yuichi Harikane and Masami Ouchi and Yoshiaki Ono and Seiji Fujimoto and Darko Donevski and Takatoshi Shibuya and Faisst, {Andreas L.} and Tomotsugu Goto and Bunyo Hatsukade and Nobunari Kashikawa and Kotaro Kohno and Takuya Hashimoto and Ryo Higuchi and Inoue, {Akio K.} and Yen-Ting Lin and Martin, {Crystal L.} and Roderik Overzier and Ian Smail and Jun Toshikawa and Hideki Umehata and Yiping Ao and Scott Chapman and Clements, {David L.} and Myungshin Im and Yipeng Jing and Toshihiro Kawaguchi and Chien-Hsiu Lee and Lee, {Minju M.} and Lihwai Lin and Yoshiki Matsuoka and Murilo Marinello and Tohru Nagao and Masato Onodera and Sune Toft and Wei-Hao Wang",

year = "2019",

month = oct,

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doi = "10.3847/1538-4357/ab2cd5",

language = "English",

volume = "883",

journal = "Astrophysical Journal",

issn = "0004-637X",

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TY - JOUR

T1 - SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7

T2 - Strong Associations of Dusty Star-forming Galaxies

AU - Harikane, Yuichi

AU - Ouchi, Masami

AU - Ono, Yoshiaki

AU - Fujimoto, Seiji

AU - Donevski, Darko

AU - Shibuya, Takatoshi

AU - Faisst, Andreas L.

AU - Goto, Tomotsugu

AU - Hatsukade, Bunyo

AU - Kashikawa, Nobunari

AU - Kohno, Kotaro

AU - Hashimoto, Takuya

AU - Higuchi, Ryo

AU - Inoue, Akio K.

AU - Lin, Yen-Ting

AU - Martin, Crystal L.

AU - Overzier, Roderik

AU - Smail, Ian

AU - Toshikawa, Jun

AU - Umehata, Hideki

AU - Ao, Yiping

AU - Chapman, Scott

AU - Clements, David L.

AU - Im, Myungshin

AU - Jing, Yipeng

AU - Kawaguchi, Toshihiro

AU - Lee, Chien-Hsiu

AU - Lee, Minju M.

AU - Lin, Lihwai

AU - Matsuoka, Yoshiki

AU - Marinello, Murilo

AU - Nagao, Tohru

AU - Onodera, Masato

AU - Toft, Sune

AU - Wang, Wei-Hao

PY - 2019/10/1

Y1 - 2019/10/1

N2 - We have obtained three-dimensional maps of the universe in ∼200 × 200 × 80 comoving Mpc3 (cMpc3) volumes each at z = 5.7 and 6.6 based on a spectroscopic sample of 179 galaxies that achieves ⪆80% completeness down to the Lyα luminosity of, based on our Keck and Gemini observations and the literature. The maps reveal filamentary large-scale structures and two remarkable overdensities made out of at least 44 and 12 galaxies at z = 5.692 (z57OD) and z = 6.585 (z66OD), respectively, making z66OD the most distant overdensity spectroscopically confirmed to date, with >10 spectroscopically confirmed galaxies. We compare spatial distributions of submillimeter galaxies at z ≃ 4-6 with our z = 5.7 galaxies forming the large-scale structures, and detect a 99.97% signal of cross-correlation, indicative of a clear coincidence of dusty star-forming galaxy and dust-unobscured galaxy formation at this early epoch. The galaxies in z57OD and z66OD are actively forming stars with star-formation rates (SFRs) ⪆5 times higher than the main sequence, and particularly the SFR density in z57OD is 10 times higher than the cosmic average at the redshift (a.k.a. the Madau-Lilly plot).

AB - We have obtained three-dimensional maps of the universe in ∼200 × 200 × 80 comoving Mpc3 (cMpc3) volumes each at z = 5.7 and 6.6 based on a spectroscopic sample of 179 galaxies that achieves ⪆80% completeness down to the Lyα luminosity of, based on our Keck and Gemini observations and the literature. The maps reveal filamentary large-scale structures and two remarkable overdensities made out of at least 44 and 12 galaxies at z = 5.692 (z57OD) and z = 6.585 (z66OD), respectively, making z66OD the most distant overdensity spectroscopically confirmed to date, with >10 spectroscopically confirmed galaxies. We compare spatial distributions of submillimeter galaxies at z ≃ 4-6 with our z = 5.7 galaxies forming the large-scale structures, and detect a 99.97% signal of cross-correlation, indicative of a clear coincidence of dusty star-forming galaxy and dust-unobscured galaxy formation at this early epoch. The galaxies in z57OD and z66OD are actively forming stars with star-formation rates (SFRs) ⪆5 times higher than the main sequence, and particularly the SFR density in z57OD is 10 times higher than the cosmic average at the redshift (a.k.a. the Madau-Lilly plot).

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: high-redshift

U2 - 10.3847/1538-4357/ab2cd5

DO - 10.3847/1538-4357/ab2cd5

M3 - Journal article

SN - 0004-637X

VL - 883

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 142

ER -

SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z similar to 6-7: Strong Associations of Dusty Star-forming Galaxies

Abstract

Keywords

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