A5061937760- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Dental Radiography and Imaging
- Botulinum Toxin and Related Neurological Disorders
- Oral microbiology and periodontitis research
- Radio Astronomy Observations and Technology
- Dental Research and COVID-19
- Oral Health Pathology and Treatment
- Orthodontics and Dentofacial Orthopedics
- Remote Sensing in Agriculture
- Adaptive optics and wavefront sensing
- Atmospheric Ozone and Climate
- HIV/AIDS oral health manifestations
- Facial Rejuvenation and Surgery Techniques
- Nuclear Materials and Properties
- Electronic and Structural Properties of Oxides
- Ocular and Laser Science Research
- Dental Health and Care Utilization
- Endodontics and Root Canal Treatments
Mahidol University
2015-2024
The University of Tokyo
2012-2016
Kyoto University
2009-2013
We present the ultra-deep Subaru narrowband imaging survey for Lyα emitters (LAEs) at z = 7.3 in Subaru/XMM-Newton Deep Survey (SXDS) and Cosmic Evolution (COSMOS) fields (∼0.5 deg2) with a total integration time of 106 hr. Exploiting our new sharp bandwidth filter, NB101, installed on Suprime-Cam, we have reached L(Lyα) 2.4 × 1042 erg s−1 (5σ) LAEs, about four times deeper than previous ≳ 7 studies, which allows us to reliably investigate evolution luminosity function (LF) first down limit...
We present diffuse Lyα haloes (LAHs) identified in the composite Subaru narrow-band images of 100–3600 emitters (LAEs) at z = 2.2, 3.1, 3.7, 5.7, and 6.6. First, we carefully examine potential artefacts mimicking LAHs that include a large-scale point-spread function made by instrumental atmospheric effects. Based on our critical test with non-LAE samples whose narrow-band-magnitude source-size distributions are same as LAE samples, confirm no can produce extended feature similar to LAHs....
Abstract We study the UV luminosity functions (LFs) at z ∼ 4, 5, 6, and 7 based on deep large-area optical images taken by Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP). On 100 deg2 sky of HSC SSP data available to date, we take enormous samples consisting a total 579565 dropout candidates 4–7 standard color selection technique, 358 out which are spectroscopically confirmed our follow-up spectroscopy other studies. obtain LFs that span very wide range ∼0.002–100$\, L_{\rm UV}^\ast$...
We present near-infrared spectroscopic observations of star-forming galaxies at z~1.4 with FMOS on the Subaru Telescope. observed K-band selected in SXDS/UDS fields K<23.9 mag, 1.2<z_ph<1.6, M*>10^{9.5} Msun, and expected F(Halpha)>10^{-16} erg s^{-1} cm^{-2}. 71 objects sample have significant detections Halpha. For these objects, excluding possible AGNs identified from BPT diagram, gas-phase metallicities are obtained [NII]/Halpha line ratio. The is split into three stellar mass bins,...
We present Lya and UV-nebular emission line properties of bright emitters (LAEs) at z=6-7 with a luminosity log L_Lya/[erg s-1] = 43-44 identified in the 21-deg2 area SILVERRUSH early sample developed Subaru Hyper Suprime-Cam (HSC) survey data. Our optical spectroscopy newly confirm 21 LAEs clear emission, contribute to make spectroscopic 96 SILVERRUSH. From sample, we select 7 remarkable as Himiko CR7 objects, perform deep Keck/MOSFIRE Subaru/nuMOIRCS near-infrared reaching 3sigma-flux...
We present a stellar mass–metallicity relation at z ∼ 1.4 with an unprecedentedly large sample of ∼340 star-forming galaxies obtained Fibre Multi-Object Spectrograph (FMOS) on the Subaru Telescope. observed K-band selected 1.2 ≤ zph 1.6 in XMM–Newton Deep Survey/Ultra Survey fields M* ≥ 109.5 M⊙, and expected F(Hα) 5 × 10−17 erg s−1 cm−2. Among ∼1200 targets, 343 objects show significant Hα emission lines. The gas-phase metallicity is from [N ii] λ6584/Hα line ratio, after excluding possible...
We present statistical properties of diffuse Lyman-alpha halos (LAHs) around high-$z$ star-forming galaxies with large Subaru samples emitters (LAEs) at $z=2.2$. make subsamples defined by the physical quantities LAEs' central luminosities, UV magnitudes, equivalent widths, and slopes, investigate LAHs' radial surface brightness (SB) profiles scale lengths $r_n$ as a function these quantities. find that there exist prominent LAHs LAEs faint bright small widths in cumulative SB profiles....
We present the results of structure analyses for a large sample 426 Lya emitters (LAEs) at z~2.2 that are observed with HST/ACS and WFC3-IR by deep extra-galactic legacy surveys. confirm merger fraction average ellipticity LAE's stellar component 10-30 % 0.4-0.6, respectively, comparable previous study results. successfully identify some LAEs have spatial offset between stellar-continuum emission peaks, d_Lya, ~2.5-4 kpc beyond our statistical errors. To uncover physical origin strong found...
We present the study of gas kinematics in narrow-line regions (NLRs) 2,009 type-2 AGNs at $z<0.34$. construct [O III]$\lambda$5007 emission-line images using publicly available broadband from Sloan Digital Sky Survey (SDSS). The III] emission area samples, measured down to $1.7\times10^{-15}$ erg/s/cm$^2$/arcsec$^2$, ranges 3.7 kpc$^2$ up 224 kpc$^2$. With our technique, we found strong correlation between and AGN luminosity inferred mid-infrared rest-frame $15\mu$m. isophotal threshold used...
We try to constrain the gas inflow and outflow rate of star-forming galaxies at z ∼ 1.4 by employing a simple analytic model for chemical evolution galaxies. The sample is constructed based on large near-infrared spectroscopic observed with Subaru/FMOS. gas-phase metallicity measured from [N ii] λ6584/Hα emission line ratio mass derived extinction corrected Hα luminosity assuming Kennicutt–Schmidt law. least-χ2 fittings gas-mass fraction, stellar mass, model. joint χ2 fitting shows that...
(abridged) We present a study of stellar population LAEs at z=4.86 in GOODS-N and its flanking field. With the publicly available IRAC data further observations fields, we select five which are not contaminated by neighboring objects images construct their observed SEDs with I_c, z', 3.6micron, 4.5micron band photometry. The cover rest-frame UV to optical wavelengths. derive masses, ages, color excesses, star formation rates using SED fitting method. Assuming constant history, find that...
Abstract Objectives This study aimed to train deep learning models for recognition of contiguity between the mandibular third molar (M3M) and inferior alveolar canal using panoramic radiographs investigate best effective fold data augmentation. Materials methods The total 1800 M3M cropped images were classified evenly into contact no-contact. group was confirmed with CBCT images. trained from three pretrained models: AlexNet, VGG-16, GoogLeNet. Each model original radiographs. Then training...
We study the statistical intrinsic shape of star-forming BzK galaxies (sBzK galaxies) at z ∼ 2 in both rest-frame UV and optical wavelengths. The sBzK are selected down to KAB = 24.0 mag GOODS-S Subaru-XMM Deep Survey (SXDS) fields, where high-resolution images from Hubble Space Telescope publicly available. Of all 1028 GOODS-S, 57% (583) show a single component Advanced Camera for Surveys/F850LP image. As Wide Field (WFC3)/F160W cover only part SXDS, 724/1028 2500/29835 respectively, have...
We study the structure of star-forming galaxies at z ∼ 2 in a Great Observatories Origins Deep Survey North field selected as BzK (sBzK) down to KAB < 24.0 mag. Among 1029 sBzK galaxies, 551 (54%) show single component Advanced Camera for (ACS)/F850LP image obtained with Hubble Space Telescope; rest multiple components. fit single-component Sérsic profile using ACS/F850LP and find that majority them (64%) index n = 0.5–2.5, indicating they have disk-like structure. The resulting effective...
We present an unprecedentedly large catalog consisting of 2,230 > L* Lya emitters (LAEs) at z=5.7 and 6.6 on the 13.8 21.2 deg2 sky, respectively, that are identified by SILVERRUSH program with first narrowband imaging data Hyper Suprime-Cam (HSC) survey. confirm LAE is reliable basis 96 LAEs whose spectroscopic redshifts already determined this previous studies. This catalogue also available on-line. Based catalogue, we derive rest-frame equivalent-width distributions z~5.7-6.6 reasonably...
We present the first systematic search for extended metal-line [OII]{\lambda}{\lambda}3726,3729 nebulae, or [OII] blobs (OIIBs), at z=1.2 using deep narrowband imaging with a survey volume of 1.9x10^5 Mpc^3 on 0.62 deg^2 sky Subaru-XMM Deep Survey (SXDS) field. discover giant OIIB, dubbed 'OIIB 1', spatial extent over ~75 kpc spectroscopic redshift z=1.18, and also identify total twelve OIIBs size >30 kpc. Our optical spectrum OIIB 1 presents [NeV]{\lambda}3426 line 6{\sigma} level,...
We present initial results from the CO survey toward high redshift galaxies using Nobeyama 45m telescope. Using new wide bandwidth spectrometer equipped with a two-beam SIS receiver, we have robust detections of three (z=1.6-3.4) submillimeter (SXDF 1100.001, SDP9, and SDP17), one tentative detection (SDSS J160705+533558), non-detection (COSMOS-AzTEC1). The observed during commissioning phase are sources known spectroscopic redshifts previous optical or wide-band submm spectroscopy. derived...
We conduct a systematic search for galaxies at $z=0.1-1.5$ with [OII]$\lambda3727$, [OIII]$\lambda5007$, or H$α\lambda6563$ emission lines extended over least 30 kpc by using deep narrowband and broadband imaging in Subaru-XMM Deep Survey (SXDS) field. These emission-line are dubbed [OII], [OIII], H$α$ blobs. Based on new selection method that securely selects galaxies, we find 77 blobs $z=0.40-1.46$ the isophotal area of down to $1.2\times10^{-18}$ erg s$^{-1}$ cm$^{-2}$ kpc$^{-2}$. Four...
We report our Keck/MOSFIRE and Magellan/LDSS3 spectroscopy for an [OII] Blob, OIIB10, that is a high-$z$ galaxy with spatially extended [OII]$\lambda\lambda3726,3729$ emission over 30 kpc recently identified by Subaru large-area narrowband survey. The systemic redshift of OIIB10 $z=1.18$ securely determined [OIII]$\lambda\lambda4959,5007$ H$\beta$ lines. identify FeII$\lambda$2587 MgII$\lambda\lambda$2796,2804 absorption lines blueshifted from the $80\pm50$ $260\pm40$ km s$^{-1}$,...
Abstract We investigate the morphological and structural evolution of disk galaxies in simulations for a wide range Toomre’s Q parameters. In addition to inspection conventional bar modes, we compute concentration, asymmetry, clumpiness (CAS) parameters enlarge understanding galaxy evolution. These are widely employed analyze light distribution observed galaxies, but adaptation numerical is not much considered. While formation takes place considerable around 1, barred originating from > 1...
We present new results on the evolution of cosmic star formation rate as a function stellar mass in Subaru/XMM-Newton Deep Survey–Ultra Survey field. make use narrow-band-selected emission line galaxies four redshift slices between z = 1.46 and 0.63, compute masses by fitting series templates to recreate each galaxy's history. determine mass-binned luminosity functions slice, derive density (ρSFR) using [O iii] or ii] lines. calculate dust extinction metallicity mass, investigate effect...
Abstract We present the results of deep Subaru/FOCAS and Keck/MOSFIRE spectroscopy for four spatially extended [O iii ] λλ 4959, 5007 sources, dubbed blobs, at z = 0.6–0.8 that are originally pinpointed by large-area Subaru imaging surveys. The line diagnostics rest-frame optical lines suggests only one blob, OIIIB-3, presents an active galactic nucleus (AGN) signature, indicating hot gas rest blobs is heated star formation. One such star-forming OIIIB-4, 0.838 has equivalent width 845 ± 27...
Abstract We present 45 ground-based photometric observations of the K2-22 system collected between 2016 December and 2017 May, which we use to investigate evolution transit disintegrating planet K2-22b. Last observed in early 2015, these new recover at multiple epochs measure a typical depth <1.5%. find that distribution our measured depths is comparable range from 2014 2015. These also support ongoing variability K2-22b shape time, although overall shallowness makes detailed analysis...
Background: Diabetes mellitus (DM) is one of the top causes death in many places world. Diagnosing DM early stage necessary to avoid severe cases and death. Objectives: To evaluate knowledge association between periodontal disease (PD) among Thai physicians assess their attitudes towards screening dental clinics Thailand. Methods: Online survey currently practicing Thailand was conducted on voluntary basis using newly developed questionnaire. Result: We received 403 responses that are...
This study aimed to find a potential biomarker that can be used diagnose prediabetic condition by comparing the salivary bacterial microbiomes between Thai dental patients with normoglycemia (NG) and those prediabetes (PPG) conditions. Thirty-three subjects were randomly recruited. Demographic data collected along oral examination unstimulated collections. The identified high-throughput sequencing on V3-V4 region of 16S rRNA gene. Microbiomes in this composed 12 phyla, 19 classes, 29 orders,...