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First data release of the Hyper Suprime-Cam Subaru Strategic Program

Ono, Yoshiaki; Ouchi, Masami; Momose, Rieko +107 more

The Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) is a three-layered imaging survey aimed at addressing some of the most important outstanding questions in astronomy today, including the nature of dark matter and dark energy. The survey has been awarded 300 nights of observing time at the Subaru Telescope, and it started in 2014 March. This…

The first-year shear catalog of the Subaru Hyper Suprime-Cam Subaru Strategic Program Survey

Strauss, Michael A.; Sifón, Cristóbal; Miyatake, Hironao +28 more

We present and characterize the catalog of galaxy shape measurements that will be used for cosmological weak lensing measurements in the Wide layer of the first year of the Hyper Suprime-Cam (HSC) survey. The catalog covers an area of 136.9 deg² split into six fields, with a mean i-band seeing of 0{^''_.}58 and 5σ point-source…

Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 quasars and luminous galaxies at 5.7 < z ≤ 6.8

Ono, Yoshiaki; Ouchi, Masami; Goto, Tomotsugu +43 more

We present spectroscopic identification of 32 new quasars and luminous galaxies discovered at 5.7 < z ≤ 6.8. This is the second in a series of papers presenting the results of the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the deep multi-band imaging data produced by the Hyper Suprime-Cam (HSC) Subaru …

Characterization and photometric performance of the Hyper Suprime-Cam Software Pipeline

Leauthaud, Alexie; Mandelbaum, Rachel; Bosch, James +9 more

The Subaru Strategic Program (SSP) is an ambitious multi-band survey using the Hyper Suprime-Cam (HSC) on the Subaru telescope. The Wide layer of the SSP is both wide and deep, reaching a detection limit of i ∼ 26.0 mag. At these depths, it is challenging to achieve accurate, unbiased, and consistent photometry across all five bands. The HSC data …

ALMA ¹²CO (J = 1-0) imaging of the nearby galaxy M 83: Variations in the efficiency of star formation in giant molecular clouds

Nakanishi, Hiroyuki; Kuno, Nario; Kawabe, Ryohei +6 more

We present results of the ¹²CO (1-0) mosaic observations of the nearby barred-spiral galaxy M 83 obtained with the Atacama Large Millimeter/submillimeter Array (ALMA). The total flux is recovered by combining the ALMA data with single-dish data obtained using the Nobeyama 45 m telescope. The combined map covers a ∼13 kpc² fie…

Triggering the formation of the supergiant H II region NGC 604 in M 33

Tachihara, Kengo; Fukui, Yasuo; Sano, Hidetoshi +4 more

Formation mechanism of a supergiant H II region NGC 604 is discussed in terms of collision of H I clouds in M 33. An analysis of the archival H I data obtained with the Very Large Array (VLA) reveals complex velocity distributions around NGC 604. The H I clouds are composed of two velocity components separated by ∼20 km s^-1 for an exten…