FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions

Harada, Naoki,   Yajima, Hidenobu,   Abe, Makito

We study gas and metal outflow from massive galaxies in protocluster regions at z = 3 - 9 by using the results of FOREVER22 simulation projects. Our simulations contain massive haloes with Mhrsim1013 M⊙, showing high star formation rates of > 100 M⊙ yr-1 and hosting supermassive black holes with MBHrsim108 M⊙. We show...

Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality

Fukushima, Hajime,   Yajima, Hidenobu,   Umemura, Masayuki

The homochirality of biological molecules on Earth is a long-standing mystery regarding the origin of life. Circularly polarized ultraviolet (UV) light could induce the enantiomeric excess of biological molecules in the interstellar medium, leading to the homochirality on Earth. By performing 3D radiation transfer simulations with multiple scattering processes in...

The formation of globular clusters with top-heavy initial mass functions

Fukushima, Hajime,   Yajima, Hidenobu

We study the formation of globular clusters (GCs) in massive compact clouds with the low metallicity of Z = 10-3 Z⊙byperformingthree-dimensionalradiative- hydrodynamicsimulations.Consideringtheuncertaintyoftheinitialmassfunction(IMF)ofstarsformedinlow- metallicityandhigh-densityclouds,weinvestigatetheimpactsoftheIMFonthecloudconditionfortheGCformationwiththerangeofthepower- lawindexofIMFasγ = 1-2.35. We find that the threshold surface density (Σthr) for the GC formation increases from 800 M⊙pc^-2atγ = 2.35 to 1600 M⊙pc^-2atγ = 1.5 in...

FOREVER22: The first bright galaxies with population III stars at redshifts z ≈ 10-20 and comparisons with JWST data

Yajima, Hidenobu,   Abe, Makito,   Fukushima, Hajime,   Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami

We study the formation of the first galaxies in overdense regions modelled by the FOREVER22 simulation project. Our simulations successfully reproduce the star formation rates and the MUV - Mstar relations of candidate galaxies at z ~ 10 - 14 observed by James Webb Space Telescope (JWST). We suggest that...

Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data

Sun, Dongsheng,   Mawatari, Ken,   Ouchi, Masami,   Ono, Yoshiaki,   Yajima, Hidenobu,   Zhang, Yechi

We present cosmological-scale three-dimensional neutral hydrogen (H I) tomographic maps at z = 2-3 over a total of 837 deg2 in two blank fields that are developed with Lyα forest absorptions of 14,736 background Sloan Digital Sky Survey (SDSS) quasars at z = 2.08-3.67. Using the tomographic maps, we investigate...

Morphologies of Galaxies at z ≳ 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z 12

Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami,   Yajima, Hidenobu,   Abe, Makito,   Isobe, Yuki

We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2-5 μm imaging. Our sample consists of 22 galaxy candidates identified by stringent dropout and photo-z criteria in GLASS, CEERS, SMACS J0723, and Stephan’s Quintet flanking fields, one of which has been spectroscopically identified at z = 11.44....

EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

Nishigaki, Moka,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Rauch, Michael,   Isobe, Yuki

We search for local extremely metal-poor galaxies (EMPGs), selecting photometric candidates by broadband color excess and machine- learning techniques with the SDSS photometric data. After removing stellar contaminants by shallow spectroscopy with Seimei and Nayuta telescopes, we confirm that three candidates are EMPGs with 0.05-0.1 Z ⊙bydeepMagellan∕MagEspectroscopyforfaint[OIII]λ4363 lines. Using a...

EMPRESS. IX. Extremely Metal-poor Galaxies are Very Gas-rich Dispersion-dominated Systems: Will the James Webb Space Telescope Witness Gaseous Turbulent High-z Primordial Galaxies?

Isobe, Yuki,   Ouchi, Masami,   Nakajima, Kimihiko,   Ozaki, Shinobu,   Bouché, Nicolas F.,   Wise, John H.

We present kinematics of six local extremely metal-poor galaxies (EMPGs) with low metallicities (0.016-0.098 Z ⊙)andlowstellarmasses(10^4.7-10^7.6M_⊙).Takingdeepmedium∕high-resolution(R~ 7500) integral-field spectra with 8.2 m Subaru, we resolve the small inner velocity gradients and dispersions of the EMPGs with Hα emission. Carefully masking out substructures originating by inflow and/or outflow, we fit three-dimensional...

Modeling of Thermal Emission from ULX Pulsar Swift J0243.6+6124 with General Relativistic Radiation MHD Simulations

Inoue, Akihiro,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta

We perform general relativistic radiation magnetohydrodynamics simulations of super-Eddington accretion flows around a neutron star with a dipole magnetic field for modeling the Galactic ultraluminous X-ray source exhibiting X-ray pulsations, Swift J0243.6+6124. Our simulations show the accretion columns near the magnetic poles, the accretion disk outside the magnetosphere, and the...

An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog

Ohno, Takahiro,   Tokuda, Kazuki,   Konishi, Ayu,   Matsumoto, Takeru,   Sewiło, Marta,   Kondo, Hiroshi

The nature of molecular clouds and their statistical behavior in subsolar metallicity environments are not fully explored yet. We analyzed data from an unbiased CO (J = 2-1) survey at the spatial resolution of ~ 2 pc in the northern region of the Small Magellanic Cloud with the Atacama Compact...

3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar

Kimura, Kazutaka,   Hosokawa, Takashi,   Sugimura, Kazuyuki,   Fukushima, Hajime

Direct collapse of supermassive stars is a possible pathway to form supermassive black hole seeds at high redshifts. Whereas previous three-dimensional (3D) simulations demonstrate that supermassive stars form via rapid mass accretion, those resolving the stellar interior have been limited. Here, we report 3D radiation-hydrodynamic (RHD) simulations following the evolution...

RAIKOU (): A General Relativistic, Multiwavelength Radiative Transfer Code

Kawashima, Tomohisa,   Ohsuga, Ken,   Takahashi, Hiroyuki R.

We present a general relativistic radiative transfer code RAIKOU () for multiwavlength studies of spectra and images including the black hole shadows around Kerr black holes. Important radiative processes in hot plasmas around black holes, i.e., (cyclo-)synchrotron, bremsstrahlung emission/absorption, and Compton/inverse-Compton scattering, are incorporated. The Maxwell-Juttner and single/broken power-law electron...

Detections of [C II] 158 μm and [O III] 88 μm in a Local Lyman Continuum Emitter, Mrk 54, and Its Implications to High-redshift ALMA Studies

Ura, Ryota,   Hashimoto, Takuya,   Inoue, Akio K.,   Fadda, Dario,   Hayes, Matthew,   Puschnig, Johannes

We present integral field, far-infrared (FIR) spectroscopy of Mrk 54, a local Lyman continuum emitter, obtained with FIFI-LS on the Stratospheric Observatory for Infrared Astronomy. This is only the second time, after Haro 11, that [C II] 158 μm and [O III] 88 μm spectroscopy of the known LCEs have...

UV and Lyα Halos of Lyα Emitters across Environments at z = 2.84

Kikuta, Satoshi,   Matsuda, Yuichi,   Inoue, Shigeki,   Steidel, Charles C.,   Cen, Renyue,   Zheng, Zheng

We present UV and Lyα radial surface brightness (SB) profiles of Lyα emitters (LAEs) at z = 2.84 detected with the Hyper Suprime-Cam on the Subaru Telescope. The depth of our data, together with the wide-field coverage including a protocluster, enable us to study the dependence of Lyα halos (LAHs)...

FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions

Harada, Naoki,   Yajima, Hidenobu,   Abe, Makito

Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality

Fukushima, Hajime,   Yajima, Hidenobu,   Umemura, Masayuki

The formation of globular clusters with top-heavy initial mass functions

Fukushima, Hajime,   Yajima, Hidenobu

FOREVER22: The first bright galaxies with population III stars at redshifts z ≈ 10-20 and comparisons with JWST data

Yajima, Hidenobu,   Abe, Makito,   Fukushima, Hajime,   Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami

Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data

Sun, Dongsheng,   Mawatari, Ken,   Ouchi, Masami,   Ono, Yoshiaki,   Yajima, Hidenobu,   Zhang, Yechi

Morphologies of Galaxies at z ≳ 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z 12

Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami,   Yajima, Hidenobu,   Abe, Makito,   Isobe, Yuki

EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

Nishigaki, Moka,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Rauch, Michael,   Isobe, Yuki

EMPRESS. IX. Extremely Metal-poor Galaxies are Very Gas-rich Dispersion-dominated Systems: Will the James Webb Space Telescope Witness Gaseous Turbulent High-z Primordial Galaxies?

Isobe, Yuki,   Ouchi, Masami,   Nakajima, Kimihiko,   Ozaki, Shinobu,   Bouché, Nicolas F.,   Wise, John H.

Modeling of Thermal Emission from ULX Pulsar Swift J0243.6+6124 with General Relativistic Radiation MHD Simulations

Inoue, Akihiro,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta

An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog

Ohno, Takahiro,   Tokuda, Kazuki,   Konishi, Ayu,   Matsumoto, Takeru,   Sewiło, Marta,   Kondo, Hiroshi

3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar

Kimura, Kazutaka,   Hosokawa, Takashi,   Sugimura, Kazuyuki,   Fukushima, Hajime

RAIKOU (): A General Relativistic, Multiwavelength Radiative Transfer Code

Kawashima, Tomohisa,   Ohsuga, Ken,   Takahashi, Hiroyuki R.

Detections of [C II] 158 μm and [O III] 88 μm in a Local Lyman Continuum Emitter, Mrk 54, and Its Implications to High-redshift ALMA Studies

Ura, Ryota,   Hashimoto, Takuya,   Inoue, Akio K.,   Fadda, Dario,   Hayes, Matthew,   Puschnig, Johannes

UV and Lyα Halos of Lyα Emitters across Environments at z = 2.84

Kikuta, Satoshi,   Matsuda, Yuichi,   Inoue, Shigeki,   Steidel, Charles C.,   Cen, Renyue,   Zheng, Zheng