A5062153757- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- SAS software applications and methods
- Stellar, planetary, and galactic studies
- Nuclear Physics and Applications
- Astrophysics and Star Formation Studies
- Statistical and numerical algorithms
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Adaptive optics and wavefront sensing
- Atomic and Subatomic Physics Research
- High-pressure geophysics and materials
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Advanced MIMO Systems Optimization
- Advanced Wireless Communication Techniques
- Environmental Monitoring and Data Management
- Mechanics and Biomechanics Studies
Kyoto University
2021-2024
Abstract We conduct hard X-ray to radio multiwavelength spectral energy distribution (SED) decomposition for 57 local luminous and ultraluminous infrared galaxies observed with the Nuclear Spectroscopic Telescope Array and/or Swift/Burst Alert in GOALS sample. modify latest SED-fitting code X-CIGALE by implementing (IR) CLUMPY model, allowing us study torus model XCLUMPY self-consistently. Adopting parameters obtained fitting, we estimate properties of host galaxies, active galactic nucleus...
Abstract We present a statistical study of 180 dust continuum sources identified in 33 massive cluster fields by the Atacama Large Millimeter/submillimeter Array Lensing Cluster Survey (ALCS) over total 133 arcmin 2 area, homogeneously observed at 1.2 mm. ALCS enables us to detect extremely faint millimeter lensing magnification, including near-infrared (NIR) dark objects showing no counterparts existing Hubble Space Telescope and Spitzer images. The belong blind sample ( N = 141) with...
We present an ALMA-Herschel joint analysis of sources detected by the ALMA Lensing Cluster Survey (ALCS) at 1.15 mm. Herschel/PACS and SPIRE data 100-500 $\mu$m are deblended for 180 in 33 lensing cluster fields that either securely (141 sources; our main sample) or tentatively S/N$\geq$4 with cross-matched HST/Spitzer counterparts, down to a delensed 1.15-mm flux density $\sim0.02$ mJy. performed far-infrared spectral energy distribution modeling derived physical properties dusty star...
Abstract Sub/millimeter galaxies are a key population for the study of galaxy evolution because majority star formation at high redshifts occurred in deeply embedded dust. To search this population, we have performed an extensive survey with Atacama Large Millimeter/submillimeter Array (ALMA), called ALMA Lensing Cluster Survey (ALCS). This covers 133 arcmin 2 area and securely detects 180 sources z ∼ 0.5–6 flux limit ∼0.2 mJy 1.2 mm. Here, report results multiwavelength spectral energy...
Abstract We investigate the properties of active galactic nuclei (AGNs) in brightest submillimeter galaxies (SMGs) COSMOS field. utilize bright sample ALMA/SCUBA-2 Survey (AS2COSMOS), which consists 260 SMGs with S 870 μ m = 0.7–19.2 mJy at z 0–6. perform optical to millimeter spectral energy distribution (SED) modeling for whole sample. identify 24 AGN-host from SEDs. Supplemented by 23 X-ray-detected AGNs (X-ray AGNs), we construct an overall 40 galaxies. The X-ray luminosity upper bounds...
Abstract We perform a systematic, multiwavelength spectral energy distribution (SED) analysis of X-ray detected active galactic nuclei (AGNs) at z = 0.2–0.8 with Sloan Digital Sky Survey (SDSS) counterparts in the Stripe 82 region, consisting 60 type 1 and 137 2 AGNs covering 2–10 keV luminosity range <?CDATA $41.6\lt \mathrm{log}\ {L}_{{\rm{x}}}\lt 44.7$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mn>41.6</mml:mn> <mml:mo><</mml:mo>...
Abstract We study “buried” active galactic nuclei (AGNs) almost fully covered by circumnuclear material in ultra/luminous infrared galaxies (U/LIRGs), which show weak ionized lines from narrow-line regions. Employing an indicator of a [O iv ] 25.89 or [Ne v 14.32 μ m line to 12 AGN luminosity ratio, we find 17 buried candidates that are ]-weak ( L IV / 12,AGN ≤ −3.0) V] −3.4) among 30 AGNs local U/LIRGs. For the AGNs, estimate their covering fractions Compton-thick (CT; N H ≥ 10 24 cm −2 )...
Abstract The location of the obscuring “torus” in an active galactic nucleus (AGN) is still unresolved issue. line widths X-ray fluorescence lines originating from torus, particularly Fe K α , carry key information on radii line-emitting regions. Utilizing XCLUMPY, clumpy torus model, we develop a realistic model emission profiles AGN where take into account broadening due to Keplerian motion around black hole. Then, apply updated best available broadband spectra (3–100 keV) Circinus galaxy...
Abstract The Imaging X-ray Polarimetry Explorer (IXPE) detected polarization in the nearest Seyfert 2 galaxy, Circinus for first time. To reproduce IXPE results, we computed degree of based on two types radiative hydrodynamic simulations: a parsec-scale three-dimensional model and sub-parsec-scale axisymmetric with higher spatial resolution. In series papers, confirmed that these models naturally explain multiwavelength observations galaxy from radio to X-rays. We used Monte Carlo Simulation...
We present a statistical study of 180 dust continuum sources identified in 33 massive cluster fields by the ALMA Lensing Cluster Survey (ALCS) over total 133 arcmin$^{2}$ area, homogeneously observed at 1.2 mm. ALCS enables us to detect extremely faint mm lensing magnification, including near-infrared (NIR) dark objects showing no counterparts existing {\it Hubble Space Telescope} and Spitzer} images. The belong blind sample ($N=141$) with S/N $\gtrsim$ 5.0 (a purity $>$ 0.99) or secondary...
We report the multi-wavelength properties of millimeter galaxies hosting X-ray detected active galactic nuclei (AGNs) from ALMA Lensing Cluster Survey (ALCS). ALCS is an extensive survey well-studied lensing clusters with ALMA, covering area 133 arcmin$^2$ over 33 a 1.2 mm flux-density limit ${\sim}$60 $\mathrm{\mu Jy}$ ($1\sigma$). Utilizing archival data Chandra, we identify three AGNs at $z=$1.06, 2.09, and 2.84 among 180 sources securely in (of which 155 are inside coverage Chandra). The...
Abstract We present the result of a broadband (0.5–70 keV) X-ray spectral analysis late-merger galaxy Mrk 739, which contains dual active galactic nucleus (AGN), 739E and 739W, with separation ≈3.4 kpc. The spectra obtained NuSTAR, Chandra, XMM-Newton, Swift/BAT are simultaneously analyzed by separating contributions from two AGNs extended emission Chandra data. To evaluate reflection components AGN tori, we consider models, phenomenological one (pexrav zgauss) more physically motivated...
We report the discovery of a triply imaged active galactic nucleus (AGN), lensed by galaxy cluster MACS J0035.4-2015 ($z_{\mathrm{d}}=0.352$). The object is detected in Hubble Space Telescope imaging taken for RELICS program. It appears to have quasi-stellar consistent with point-source, de-magnified radius $r_e\lesssim100$ pc. spectroscopically confirmed be an AGN at $z_{\mathrm{spec}}=2.063\pm0.005$ showing broad rest-frame UV emission lines, and both X-ray observations Chandra ALCS ALMA...
The ALMA lensing cluster survey (ALCS) is a 96-hr large program dedicated to uncovering and characterizing intrinsically faint continuum sources line emitters with the assistance of gravitational lensing. All 33 fields were selected from HST/Spitzer treasury programs including CLASH, Hubble Frontier Fields, RELICS, which also have Herschel Chandra coverages. total sky area surveyed reaches $\sim$133 arcmin$^2$ down depth $\sim$60 $\mu$Jy beam$^{-1}$ (1$\sigma$) at 1.2 mm, yielding 141 secure...
Sub/millimeter galaxies are a key population for the study of galaxy evolution because majority star formation at high redshifts occurred in deeply embedded dust. To search this population, we have performed an extensive survey with ALMA, called ALMA Lensing Cluster Survey (ALCS). This covers 133 arcmin^2 area and securely detects 180 sources z~0.5-6 flux limit ~0.2 mJy 1.2 mm (Fujimoto et al. 2023). Here report results multi-wavelength spectral energy distribution (SED) analysis whole ALCS...
We study "buried" active galactic nuclei (AGNs) almost fully covered by circumnuclear material in ultra-/luminous infrared galaxies (U/LIRGs), which show weak ionized lines from narrow line regions. Employing an indicator of [O IV] 25.89-um or [Ne V] 14.32-um to 12-um AGN luminosity ratio, we find 17 buried candidates that are IV]-weak ($L_{\rm [O\,IV]}$/$L_{\rm 12,AGN} \leq -$3.0) V]-weak [Ne\,V]}$/$L_{\rm -$3.4) among 30 AGNs local U/LIRGs. For the AGNs, estimate their covering fractions...
We present results from Atacama Large Millimeter/submillimeter Array (ALMA) spectral line-scan observations at 3-mm and 2-mm bands of three near-infrared-dark (NIR-dark) galaxies behind two massive lensing clusters MACS J0417.5-1154 RXC J0032.1+1808. Each these sources is a faint (de-lensed $S_{\text{1.2 mm}}$ $<$ 1 mJy) triply lensed system originally discovered in the ALMA Lensing Cluster Survey. have successfully detected CO [C I] emission lines confirmed that their spectroscopic...
We investigate the properties of active galactic nuclei (AGNs) in brightest submillimeter galaxies (SMGs) COSMOS field. utilize bright sample ALMA/SCUBA-2 Survey (AS2COSMOS), which consists 260 SMGs with $S_{\mathrm{870}\, \mu \mathrm{m}}=0.7\text{--}19.2\,\mathrm{mJy}$ at $z=0\text{--}6$. perform optical to millimeter spectral energy distribution (SED) modeling for whole sample. identify 24 AGN-host from SEDs. Supplemented by 23 X-ray detected AGNs (X-ray AGNs), we construct an overall 40...
We conduct a hard X-ray to radio multiwavelength spectral energy distribution (SED) decomposition for 57 local luminous and ultraluminous infrared galaxies (U/LIRGs) observed with Nuclear Spectroscopic Telescope Array and/or Swift/Burst Alert in GOALS (Armus et al. 2009) sample. modify the latest SED-fitting code X-CIGALE by implementing (IR) CLUMPY model, allowing study torus model (XCLUMPY) self-consistently. Adopting parameters obtained fitting (Yamada 2021), we estimate properties of...
We report the multi-wavelength properties of millimeter galaxies hosting X-ray detected active galactic nuclei (AGNs) from ALMA Lensing Cluster Survey (ALCS). ALCS is an extensive survey well-studied lensing clusters with ALMA, covering area 133 arcmin$^2$ over 33 a 1.2 mm flux-density limit ${\sim}$60 $\mathrm{μJy}$ ($1σ$). Utilizing archival data Chandra, we identify three AGNs at $z=$1.06, 2.09, and 2.84 among 180 sources securely in (of which 155 are inside coverage Chandra). The...
Radio galaxies are a key population to understand the importance of relativistic jets in AGN feedback. We present results systematic, broadband X-ray spectral analysis hard selected radio investigate their nuclear structures. In this study, we focus on seven most radio-loud, obscured narrow line \textit{Swift}/BAT 70 month catalog. The spectra from 0.5 keV up 66 obtained with \textit{Suzaku} and \textit{NuSTAR} six objects newly analyzed here by utilizing clumpy torus model (XCLUMPY),...
We report the discovery of a triply imaged active galactic nucleus (AGN), lensed by galaxy cluster MACS J0035.4-2015 ($z_{\mathrm{d}}=0.352$). The object is detected in Hubble Space Telescope imaging taken for RELICS program. It appears to have quasi-stellar consistent with point-source, de-magnified radius $r_e\lesssim100$ pc. spectroscopically confirmed be an AGN at $z_{\mathrm{spec}}=2.063\pm0.005$ showing broad rest-frame UV emission lines, and both X-ray observations Chandra ALCS ALMA...