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The gas and stellar content of a metal-poor galaxy at as revealed by JWST and ALMA
K. E. Heintz, C. Giménez-Arteaga, S. Fujimoto +27
We present a joint analysis of the galaxy S04590 at based on NIRSpec, NIRCam, and NIRISS observations obtained through as part of Early Release Observations programme of…
JWST and ALMA Multiple-Line Study in and around a Galaxy at : Optical to FIR Line Ratios and the Onset of an Outflow Promoting Ionizing Photon Escape
Seiji Fujimoto, Masami Ouchi, Kimihiko Nakajima +33
We present ALMA deep spectroscopy for a lensed galaxy at with whose optical nebular lines and stellar continuum are detec…
ALMA Observations for CO Emission from Luminous Lyman-break Galaxies at -
Yoshiaki Ono, Seiji Fujimoto, Yuichi Harikane +14
We present our new Atacama Large Millimeter/submillimeter Array (ALMA) observations targeting CO(6-5) emission from three luminous Lyman break galaxies (LBGs) at $z_{\rm spec} = 6.…
FOREVER22: the first bright galaxies with population III stars at redshifts and comparisons with JWST data
Hidenobu Yajima, Makito Abe, Hajime Fukushima +5
We study the formation of the first galaxies in overdense regions modelled by the FORmation and EVolution of galaxies in Extremely overdense Regions motivated by SSA22 (FOREVER22)…
A solar metallicity galaxy at 7? Possible detection of the [N II] 122 m and [O III] 52 m lines
Meghana Killi, Darach Watson, Seiji Fujimoto +9
We present the first detection of the [N II] 122 m and [O III] 52 m lines for a reionisation-epoch galaxy. Based on these lines and previous [C II] 158 m and [O III] 88 $μ…
A Lower Bound of Star Formation Activity in Ultra-high Redshift Galaxies Detected with JWST: Implications for Stellar Populations and Radiation Sources
Kohei Inayoshi, Yuichi Harikane, Akio K. Inoue +2
Early results of JWST observations have delivered bright galaxy candidates in greater numbers than expected, enabling construction of the rest-frame UV luminosity fun…
Morphologies of Galaxies at Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at
Yoshiaki Ono, Yuichi Harikane, Masami Ouchi +8
We present morphologies of galaxies at resolved by JWST/NIRCam -m imaging. Our sample consists of galaxy candidates identified by stringent dropout and ph…
Extreme Value Statistics of the Halo and Stellar Mass Distributions at High Redshift: are JWST Results in Tension with ΛCDM?
Christopher C. Lovell, Ian Harrison, Yuichi Harikane +2
The distribution of dark matter halo masses can be accurately predicted in the CDM cosmology. The presence of a single massive halo or galaxy at a particular redshift, assuming…
A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
Yuichi Harikane, Masami Ouchi, Masamune Oguri +6
We conduct a comprehensive study on dropout galaxy candidates at using the first 90 arcmin JWST/NIRCam images taken by the early release observations (ERO) and earl…
Bridging Optical and Far-Infrared Emission-Line Diagrams of Galaxies from Local to the Epoch of Reionization: Characteristic High [O III] 88 /SFR at
Yuma Sugahara, Akio K. Inoue, Yoshinobu Fudamoto +3
We present photoionization modeling of galaxy populations at , , and to bridge optical and far-infrared (FIR) emission-line diagrams. We collect galaxies with meas…
EMPRESS. V. Metallicity Diagnostics of Galaxies over 12+log(O/H)=~6.9-8.9 Established by a Local Galaxy Census: Preparing for JWST Spectroscopy
Kimihiko Nakajima, Masami Ouchi, Yi Xu +13
We present optical-line gas metallicity diagnostics established by the combination of local SDSS galaxies and the largest compilation of extremely metal-poor galaxies (EMPGs) inclu…
EMPRESS. IX. Extremely Metal-Poor Galaxies are Very Gas-Rich Dispersion-Dominated Systems: Will JWST Witness Gaseous Turbulent High-z Primordial Galaxies?
Yuki Isobe, Masami Ouchi, Kimihiko Nakajima +49
We present kinematics of 6 local extremely metal-poor galaxies (EMPGs) with low metallicities () and low stellar masses (). Tak…
EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension
Akinori Matsumoto, Masami Ouchi, Kimihiko Nakajima +42
The primordial He abundance is a powerful probe of cosmology. Currently, is best determined by observations of metal-poor galaxies, while there are on…
Big Three Dragons: Molecular Gas in a Bright Lyman-Break Galaxy at
Takuya Hashimoto, Akio K. Inoue, Yuma Sugahara +10
We report ALMA Band 3 observations of CO(6-5), CO(7-6), and [CI](2-1) in B14-65666 (``Big Three Dragons''), one of the brightest Lyman-Break Galaxies at in the rest-frame ult…
CHORUS IV: Mapping the Spatially Inhomogeneous Cosmic Reionization with Subaru HSC
Takehiro Yoshioka, Nobunari Kashikawa, Akio K. Inoue +11
The spatial inhomogeneity is one of the important features for understanding the reionization process; however, it has not yet been fully quantified. To map this inhomogeneous dist…
EMPRESS. VII. Ionizing Spectrum Shapes of Extremely Metal-Poor Galaxies: Uncovering the Origins of Strong HeII and the Impact on Cosmic Reionization
Hiroya Umeda, Masami Ouchi, Kimihiko Nakajima +5
Strong high-ionization lines such as HeII of young galaxies are puzzling at high and low redshift. Although recent studies suggest the existence of non-thermal sources, whether the…
Are the Newly-Discovered Drop-out Sources Starburst Galaxies or Quasars?
Fabio Pacucci, Pratika Dayal, Yuichi Harikane +2
The detection of two galaxy candidates has opened a new window on galaxy formation at an era only Myr after the Big Bang. Here, we investigate the physical nature…