SILVERRUSH. III. Deep Optical and Near-Infrared Spectroscopy for Lya and UV-Nebular Lines of Bright Lya Emitters at z=6-7
Takatoshi Shibuya,Masami Ouchi,Yuichi Harikane,Michael Rauch,Yoshiaki Ono,Shiro Mukae,Ryo Higuchi,Takashi Kojima,Suraphong Yuma,Chien-Hsiu Lee,Hisanori Furusawa,Akira Konno,Crystal L. Martin,Kazuhiro Shimasaku,Yoshiaki Taniguchi,Masakazu A. R. Kobayashi,Masaru Kajisawa,Tohru Nagao,Tomotsugu Goto,Nobunari Kashikawa,Yutaka Komiyama,Haruka Kusakabe,Rieko Momose,Kimihiko Nakajima,Masayuki Tanaka,Shiang-Yu Wang +25 more
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TLDR
In this article, Li et al. presented Lya and UV-nebular emission line properties of bright Lya emitters (LAEs) at z=6-7 with a luminosity of log L_Lya/[erg s-1] = 43-44 identified in the 21-deg2 area of the SILVERRUSH early sample developed with the Subaru Hyper Suprime-Cam (HSC) survey data.Abstract:
We present Lya and UV-nebular emission line properties of bright Lya emitters (LAEs) at z=6-7 with a luminosity of log L_Lya/[erg s-1] = 43-44 identified in the 21-deg2 area of the SILVERRUSH early sample developed with the Subaru Hyper Suprime-Cam (HSC) survey data. Our optical spectroscopy newly confirm 21 bright LAEs with clear Lya emission, and contribute to make a spectroscopic sample of 96 LAEs at z=6-7 in SILVERRUSH. From the spectroscopic sample, we select 7 remarkable LAEs as bright as Himiko and CR7 objects, and perform deep Keck/MOSFIRE and Subaru/nuMOIRCS near-infrared spectroscopy reaching the 3sigma-flux limit of ~ 2x10^{-18} erg s-1 for the UV-nebular emission lines of He II1640, C IV1548,1550, and O III]1661,1666. Except for one tentative detection of C IV, we find no strong UV-nebular lines down to the flux limit, placing the upper limits of the rest-frame equivalent widths (EW_0) of ~2-4 A for He II, C IV, and O III] lines. Here we also investigate the VLT/X-SHOOTER spectrum of CR7 whose 6 sigma detection of He II is claimed by Sobral et al. Although two individuals and the ESO-archive service carefully re-analyze the X-SHOOTER data that are used in the study of Sobral et al., no He II signal of CR7 is detected, supportive of weak UV-nebular lines of the bright LAEs even for CR7. Spectral properties of these bright LAEs are thus clearly different from those of faint dropouts at z~7 that have strong UV-nebular lines shown in the various studies. Comparing these bright LAEs and the faint dropouts, we find anti-correlations between the UV-nebular line EW_0 and UV-continuum luminosity, which are similar to those found at z~2-3.read more
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Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
John J. Eldridge,Elizabeth R. Stanway,L. Xiao,L. A. S. McClelland,G. Taylor,M. Ng,Stephanie M. L. Greis,J. C. Bray +7 more
TL;DR: The Binary Population and Spectral Synthesis suite of binary stellar evolution models and synthetic stellar populations provides a framework for the physically motivated analysis of both the integrated light from distant stellar populations and the detailed properties of those nearby as discussed by the authors.
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Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
John J. Eldridge,Elizabeth R. Stanway,L. Xiao,L. A. S. McClelland,G. Taylor,M. Ng,Stephanie M. L. Greis,J. C. Bray +7 more
TL;DR: The Binary Population and Spectral Synthesis (BPASS) suite of binary stellar evolution models and synthetic stellar populations provides a framework for the physically motivated analysis of both the integrated light from distant stellar populations and the detailed properties of those nearby as mentioned in this paper.
Journal ArticleDOI
Great Optically Luminous Dropout Research Using Subaru HSC (GOLDRUSH). I. UV luminosity functions at z ∼ 4-7 derived with the half-million dropouts on the 100 deg2 sky
Yoshiaki Ono,Masami Ouchi,Masami Ouchi,Yuichi Harikane,Jun Toshikawa,Michael Rauch,Suraphong Yuma,Marcin Sawicki,Takatoshi Shibuya,Kazuhiro Shimasaku,Masamune Oguri,Masamune Oguri,Chris J. Willott,Mohammad Akhlaghi,Masayuki Akiyama,Jean Coupon,Nobunari Kashikawa,Yutaka Komiyama,Akira Konno,Lihwai Lin,Yoshiki Matsuoka,Satoshi Miyazaki,Tohru Nagao,Kimihiko Nakajima,John D. Silverman,Masayuki Tanaka,Yoshiaki Taniguchi,Shiang-Yu Wang +27 more
TL;DR: In this paper, the authors studied the UV luminosity functions (LFs) at 4, 5, 6, and 7$ on the 100 deg$^2$ sky of the Hyper Suprime-Cam (HSC) strategic program (SSP).
Journal ArticleDOI
Great Optically Luminous Dropout Research Using Subaru HSC (GOLDRUSH). I. UV Luminosity Functions at $z \sim 4-7$ Derived with the Half-Million Dropouts on the 100 deg$^2$ Sky
Yoshiaki Ono,Masami Ouchi,Yuichi Harikane,Jun Toshikawa,Michael Rauch,Suraphong Yuma,Marcin Sawicki,Takatoshi Shibuya,Kazuhiro Shimasaku,Masamune Oguri,Chris J. Willott,Mohammad Akhlaghi,Masayuki Akiyama,Jean Coupon,Nobunari Kashikawa,Yutaka Komiyama,Akira Konno,Lihwai Lin,Yoshiki Matsuoka,Satoshi Miyazaki,Tohru Nagao,Kimihiko Nakajima,John D. Silverman,Masayuki Tanaka,Yoshiaki Taniguchi,Shiang-Yu Wang +25 more
TL;DR: In this paper, the authors studied the UV luminosity functions (LFs) at $z\sim 4, $5, $6, and $7$ based on the deep large-area optical images taken by the HSC Subaru strategic program (SSP).
Journal ArticleDOI
Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program strategy and clustering properties of ∼2000 Lyα emitters at z = 6–7 over the 0.3–0.5 Gpc2 survey area
Masami Ouchi,Masami Ouchi,Yuichi Harikane,Takatoshi Shibuya,Kazuhiro Shimasaku,Yoshiaki Taniguchi,Akira Konno,Masakazu A. R. Kobayashi,Masaru Kajisawa,Tohru Nagao,Yoshiaki Ono,Akio K. Inoue,Masayuki Umemura,Masao Mori,Kenji Hasegawa,Ryo Higuchi,Yutaka Komiyama,Yuichi Matsuda,Kimihiko Nakajima,T. Saito,Shiang-Yu Wang +20 more
References
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Journal ArticleDOI
The Discovery of a Large Lyman-alpha+HeII Nebula at z~1.67: A Candidate Low Metallicity Region?
TL;DR: In this article, the first spatially-extended Lya+HeII emitter has been observed and the lowest redshift Lya blob yet found, which exhibits strong, spatially extended HeII emission and very weak CIV and CIII] emission.
Journal ArticleDOI
The brightest Ly α emitter: Pop III or black hole?
Andrea Pallottini,Andrea Ferrara,Fabio Pacucci,Simona Gallerani,Stefania Salvadori,Raffaella Schneider,Daniel Schaerer,Daniel Schaerer,David Sobral,David Sobral,J.A.A. Matthee +10 more
TL;DR: In this article, a cosmological hydrodynamical simulation of the Pop III wave pattern observed in CR7 is used to predict the luminosities of Pop III stars in the COSMOS/UDS/SA22 fields.
Journal ArticleDOI
DEEP HE ii AND C iv SPECTROSCOPY OF A GIANT LYα NEBULA: DENSE COMPACT GAS CLUMPS IN THE CIRCUMGALACTIC MEDIUM OF A z ∼ 2 QUASAR*
Fabrizio Arrigoni Battaia,Fabrizio Arrigoni Battaia,Joseph F. Hennawi,J. Xavier Prochaska,Sebastiano Cantalupo,Sebastiano Cantalupo +5 more
TL;DR: In this paper, the authors obtained the deepest ever spectroscopic integrations in the He ii and C iv λ1549 emission lines with the goal of detecting extended line emission, but detect neither line to a 3σ limiting SB ≃ 10−18 erg s−1 cm−2 arcsec−2.
Journal ArticleDOI
GOLDRUSH. III. A systematic search for protoclusters at z ∼ 4 based on the >100 deg2 area
Jun Toshikawa,Hisakazu Uchiyama,Nobunari Kashikawa,Masami Ouchi,Roderik Overzier,Yoshiaki Ono,Yuichi Harikane,Shogo Ishikawa,Tadayuki Kodama,Yuichi Matsuda,Yen-Ting Lin,Masafusa Onoue,Masayuki Tanaka,Tohru Nagao,Masayuki Akiyama,Yutaka Komiyama,Tomotsugu Goto,Chien-Hsiu Lee +17 more
TL;DR: In this paper, the authors conduct a systematic search for galaxy protoclusters at $z −3.8$ based on the latest internal data release (S16A) of the Hyper SuprimeCam Subaru strategic program (HSC-SSP).
Journal ArticleDOI
Spectroscopic properties of luminous Ly α emitters at z ≈ 6-7 and comparison to the Lyman-break population
Jorryt Matthee,David Sobral,David Sobral,Behnam Darvish,Sergio Da Graça Santos,Bahram Mobasher,Ana Paulino-Afonso,Huub Röttgering,L. Alegre +8 more
TL;DR: In this article, the authors present spectroscopic follow-up of candidate luminous Lyα emitters (LAEs) at z = 5.7-6.6 in the SA22 field with VLT/X-SHOOTER.