Nuo Chen

BEACON: JWST NIRCam Pure-parallel Imaging Survey. IV. A Systematic Search for Galaxy Overdensities and Evidence for Gas Accretion Mode Transition

Ryo A. Sutanto, Takahiro Morishita, Tadayuki Kodama, Abdurrouf et autres

Abstract We systematically search for galaxy overdensities using 20 independent fields with a minimum of six filters (F090W, F115W, F150W, F277W, F356W, and F444W) from BEACON, the JWST Cycle 2 NIRCam pure-parallel imaging survey. We apply an adaptive kernel-density estimation method that …

jp, de, us, gb, se, th, dk, au, it (code pays fourni par la source)

Green Flash: Residual Emissions Enshrouded in Low-mass Balmer-break Galaxies at $z\sim5$

Takahiro Morishita, Tadayuki Kodama, Zhaoran Liu, Kazuki Daikuhara et autres

Recent James-Webb Space Telescope (JWST) observations have discovered galaxies that are already passively evolving at $z>4$, $\sim1.5$\,Gyr after the Big Bang. Remarkably, some of these galaxies exhibit strong emission lines such as \ha\ and \oiii\ while showing a strong continuum break at …

Compact [O iii ] Emission-line Regions (“Green Seeds”) in Hα Emitters at Cosmic Noon from JWST Observations

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Matthew A. Malkan

Abstract We present a rest-frame optical, spatially resolved analysis of more than 100 Hα emitters (HAEs) at z ∼ 2.2 in the ZFOURGE-CDFS field using NIRCam imaging from the JWST Advanced Deep Extragalactic Survey. The ultradeep, high-resolution data give us maps of …

Compact [OIII] emission-line regions ("Green Seeds") in $\mathrm{Hα}$ emitters at Cosmic Noon from JWST Observations

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Matthew A. Malkan

We present a rest-frame optical, spatially resolved analysis of more than 100 $\mathrm{Hα}$ emitters (HAEs) at $z\sim2.2$ in the ZFOURGE-CDFS field using NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES). The ultra-deep, high-resolution data gives us maps of the resolved …

Toward Unveiling Cosmic Reionization: The Ionizing Photon Production Efficiency (ξ ion) of Low-mass Hα Emitters at z ∼ 2.3

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Kimihiko Nakajima et autres

Abstract We investigate the galaxy properties of ∼400 low-mass (<109 M ⊙) Hα emitters (HAEs) at z ∼ 2.3 in the ZFOURGE survey. The selection of these HAEs is based on the excess in the observed K s broadband flux compared to …

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Development of a near-infrared wide-field integral field unit by ultra-precision diamond cutting

Kosuke Kushibiki, Shinobu Ozaki, Masahiro Takeda, Takuya Hosobata et autres

Integral field spectroscopy (IFS) is an observational method for obtaining spatially resolved spectra over a specific field of view (FoV) in a single exposure. In recent years, near-infrared IFS has gained importance in observing objects with strong dust attenuation or at a …

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Multiple Emission Lines of Hα Emitters at z ∼ 2.3 from the Broad- and Medium-band Photometry in the ZFOURGE Survey

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Kimihiko Nakajima et autres

Abstract We present a multiple emission line study of ∼1300 Hα emitters (HAEs) at z ∼ 2.3 in the ZFOURGE survey. In contrast to the traditional spectroscopic method, our sample is selected based on the flux excess in the ZFOURGE K s …

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Multiple emission lines of H$α$ emitters at $z \sim 2.3$ from the broad and medium-band photometry in the ZFOURGE Survey

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Kimihiko Nakajima et autres

We present a multiple emission lines study of $\sim$1300 H$α$ emitters (HAEs) at $z \sim 2.3$ in the ZFOURGE survey. In contrast to the traditional spectroscopic method, our sample is selected based on the flux excess in the ZFOURGE-$K_s$ broad-band data relative …

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A Selection of Hα Emitters at z = 2.1–2.5 Using the K s -band Photometry of ZFOURGE

Yasunori Terao, Lee R. Spitler, Kentaro Motohara, Nuo Chen

Abstract Large and less-biased samples of star-forming galaxies are essential to investigate galaxy evolution. Hα emission line is one of the most reliable tracers of star-forming galaxies because its strength is directly related to recent star formation. However, it is observationally expensive …

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Development status of TAO/MIMIZUKU: performance test of the near-infrared channel

Takafumi Kamizuka, Takashi Miyata, Shigeyuki Sako, Ryou Ohsawa et autres

MIMIZUKU is the first-generation mid-infrared instrument for the TAO 6.5-m telescope. It has three internal optical channels to cover a wide wavelength range from 2 to 38 µm. Of the three channels, the NIR channel is responsible for observations in the shortest …

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Development status of a near-infrared integral field unit SWIMS-IFU

Kosuke Kushibiki, Shinobu Ozaki, Masahiro Takeda, Takuya Hosobata et autres

This conference presentation was prepared for the Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V conference at SPIE Astronomical Telescopes + Instrumentation, 2022.

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The University of Tokyo Atacama Observatory 6.5m telescope : On-sky performance of the near-infrared instrument SWIMS on the Subaru telescope

Masahiro Konishi, Kentaro Motohara, Hidenori Takahashi, Natsuko Kato et autres

The Simultaneous-color Wide-field Infrared Multi-object Spectrograph (SWIMS) is one of the 1st generation facility instruments for the University of Tokyo Atacama Observatory (TAO) 6.5 m telescope currently being constructed at the summit of Cerro Chajnantor (5,640 m altitude) in northern Chile. SWIMS …

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