Daisuke Iono
A5066854408- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Superconducting and THz Device Technology
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- Atmospheric Ozone and Climate
- Microwave Engineering and Waveguides
- Atomic and Subatomic Physics Research
- CCD and CMOS Imaging Sensors
- Ionosphere and magnetosphere dynamics
- Antenna Design and Optimization
- Atmospheric and Environmental Gas Dynamics
- Molecular Spectroscopy and Structure
- Phase Equilibria and Thermodynamics
- Nuclear Physics and Applications
- Advanced Frequency and Time Standards
- Satellite Communication Systems
The Graduate University for Advanced Studies, SOKENDAI
2016-2025
National Astronomical Observatory of Japan
2016-2025
National Institutes of Natural Sciences
2016-2023
Trinity House
2014
The University of Tokyo
2008-2014
Misato Observatory
2009-2013
Center for Astrophysics Harvard & Smithsonian
2004-2011
University of Massachusetts Amherst
2002-2005
Harvard University
2004
We present a 69 arcmin$^2$ ALMA survey at 1.1mm, GOODS-ALMA, matching the deepest HST-WFC3 H-band part of GOODS-South field. taper 0"24 original image with homogeneous and circular synthesized beam 0"60 to reduce number independent beams - thus reducing purely statistical spurious detections optimize sensitivity point sources. extract catalogue galaxies selected by identify sources without HST counterparts down 5$\sigma$ limiting depth H=28.2 AB (HST/WFC3 F160W). detects 20 brighter than 0.7...
We report deep ALMA observations complemented by associated Hubble Space Telescope (HST) imaging for a luminous (mUV = 25) galaxy, "Himiko," at redshift of z 6.595. The galaxy is remarkable its high star formation rate, 100 M☉ yr−1, which has been securely estimated from our HST and Spitzer photometry, the absence any evidence strong active galactic nucleus activity or gravitational lensing magnification. Our probe an order magnitude deeper than previous IRAM observations, yet fail to detect...
We report the source size distribution, as measured by ALMA millimetric continuum imaging, of a sample 13 AzTEC-selected submillimeter galaxies (SMGs) at –6. Their infrared luminosities and star formation rates (SFRs) are 2– ∼200–600 yr−1, respectively. The sizes these SMGs range from 010 to 038, with median 020 (FWHM), corresponding circularized effective radius () kpc, comparable typical stellar component in compact quiescent (cQGs)— kpc. surface SFR density our is yr−1 kpc−2, that seen...
We have used the Submillimeter Array to image a flux-limited sample of seven submillimeter galaxies, selected by AzTEC camera on JCMT at 1.1 mm, in COSMOS field 890 μ m with ~2'' resolution. All sources—two radio-bright and five radio-dim—are detected as single point sources high significance (>6 σ), positions accurate ~0.2'' that enable counterpart identification other wavelengths observed similarly angular IRAC counterparts, but only two secure counterparts deep HST ACS imaging. As...
We present new data obtained with the Submillimeter Array for a sample of fourteen nearby luminous and ultraluminous infrared galaxies.The galaxies were selected to have distances D L < 200 Mpc far-infrared luminosities log FIR > 11.4.The observed spatial resolutions order
We present < 1 kpc resolution CO imaging study of 37 optically-selected local merger remnants using new and archival interferometric maps obtained with ALMA, CARMA, SMA PdBI. supplement a sub-sample single-dish measurements at the NRO 45 m telescope for estimating molecular gas mass (10^7 - 10^11 M_sun), evaluating missing flux measurements. Among sources robust detections, we find that 80 % (24/30) sample show kinematical signatures rotating disks (including nuclear rings) in their velocity...
We present initial results of very high resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations the z = 3.042 gravitationally lensed submillimeter galaxy HATLAS J090311.6+003906 (SDP.81). These were carried out using a extended configuration as part Science Verification for 2014 ALMA Long Baseline Campaign, with baselines up to ∼15 km. continuum imaging at 151, 236, and 290 GHz unprecedented angular resolutions fine 23 mas, corresponding an unmagnified spatial scale ∼180...
Abstract We present ALMA [C ii] line and far-infrared (FIR) continuum observations of three $z \gt 6$ low-luminosity quasars ($M_{\rm 1450} -25$ mag) discovered by our Subaru Hyper Suprime-Cam (HSC) survey. The was detected in all targets with luminosities $(2.4\mbox{--}9.5) \times 10^8\, L_{\odot }$, about one order magnitude smaller than optically luminous \lesssim quasars. FIR range from $\lt 9 10^{10}\, }$ (3 $\sigma$ limit) to ${\sim } 2 10^{12}\, indicating a wide star formation rates...
Submillimeter/millimeter observations of dusty star-forming galaxies with the Atacama Large Millimeter/submillimeter Array (ALMA) have shown that dust continuum emission generally occurs in compact regions smaller than stellar distribution. However, it remains to be understood how systematic these findings are. Studies often lack homogeneity sample selection, target discontinuous areas inhomogeneous sensitivities, and suffer from modest u v coverage coming single array configurations....
Our current understanding of the cosmic star formation history at z>3 is primarily based on UV-selected galaxies (i.e., LBGs). Recent studies H-dropouts have revealed that we may be missing a large proportion taking place in massive z>3. In this work, extend H-dropout criterion to lower masses select optically dark/faint (OFGs), order complete census between LBGs and H-dropouts. (H> 26.5 mag & [4.5] < 25 mag) combined with de-blending technique designed not only extremely dust-obscured but...
We present a detailed comparison of the CO(3-2) emitting molecular gas between local sample luminous infrared galaxies (U/LIRGs) and high redshift that comprises submm selected (SMGs), quasars, Lyman Break Galaxies (LBGs). The U/LIRG consists our recent survey using Submillimeter Array while data for population are obtained from literature. find L(CO(3-2)) L(FIR) relation is correlated over five orders magnitude, which suggests traced in emission robust tracer dusty star formation activity....
We present high resolution submillimeter interferometric imaging of two the brightest high-redshift galaxies known: GN20 and AzTEC1 at 0.8 0.3 arcsec respectively. Our data - highest redshift sources accomplished to date was collected in three different array configurations: compact, extended, very extended. derive angular sizes 0.6 1.0 for 0.4 from modeling their visibility functions as a Gaussian elliptical disk Because both are B-band dropouts, they likely lie within relatively narrow...
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [C ii] 157.7 μm fine structure line and thermal dust continuum emission from a pair gas-rich galaxies at z = 4.7, BR1202-0725. This system consists luminous quasar host galaxy bright submillimeter (SMG), while fainter star-forming is also spatially coincident within 4'' (25 kpc) region. All three are detected in continuum, indicating FIR luminosities excess 1013 L☉ for two most objects. The SMG both with L[C...
We report the results of counterpart identification and a detailed analysis physical properties 48 sources discovered in our deep 1.1mm wavelength imaging survey GOODS-South field using AzTEC instrument on Atacama Submillimeter Telescope Experiment (ASTE). One or more robust tentative candidate is found for 27 14 sources, respectively, by employing radio continuum, Spitzer MIPS & IRAC, LABOCA 870 micron data. Five (10%) have two counterparts each, supporting idea that these galaxies are...
We present the first results from a confusion-limited map of Great Observatories Origins Deep Survey-South (GOODS-S) taken with AzTEC camera on Atacama Submillimeter Telescope Experiment. imaged field to 1σ depth 0.48–0.73 mJy beam−1, making this one deepest blank-field surveys at mm-wavelengths ever achieved. Although by traditional standards our GOODS-S is extremely confused due sea faint underlying sources, we demonstrate through simulations that source identification and number counts...
We present results from a deep 2'x3' (comoving scale of 3.7 Mpc x 5.5 at z=3) survey 1.1 mm taken with the Atacama Large Millimeter/submillimeter Array (ALMA) in SSA22 field. observe core region z = 3.09 protocluster, achieving typical rms sensitivity 60 micro-Jy/beam spatial resolution 0".7. detect 18 robust ALMA sources signal-to-noise ratio (SNR) > 5. Comparison between map and AzTEC camera on Submillimeter Telescope Experiment (ASTE) indicates that three submillimeter discovered by...
We present results of a 1.1-mm deep survey the AKARI Deep Field South (ADF-S) with AzTEC mounted on Atacama Submillimetre Telescope Experiment (ASTE). obtained map 0.25-deg2 area an rms noise level 0.32–0.71 mJy. This is one deepest and widest maps thus far at millimetre submillimetre wavelengths. uncovered 198 sources significance 3.5σ–15.6σ, providing largest catalogue in contiguous region. Most are not detected far-infrared bands satellite, suggesting that they mostly z≥ 1.5 given...
We present our ALMA Cycle 4 measurements of the [CII] emission line and underlying far-infrared (FIR) continuum from four optically low-luminosity ($M_{\rm 1450} > -25$) quasars at $z \gtrsim 6$ discovered by Subaru Hyper Suprime Cam (HSC) survey. The FIR luminosities lie in ranges $L_{\rm [CII]} = (3.8-10.2) \times 10^8~L_\odot$ FIR} (1.2-2.0) 10^{11}~L_\odot$, which are least one order magnitude smaller than those optically-luminous 6$. estimate star formation rates (SFR) targets as...
We present the results from a 1.1-mm imaging survey of SSA22 field, known for having an overdensity z = 3.1 Lyman α emitting galaxies (LAEs), taken with astronomical thermal emission camera (AzTEC) on Atacama Submillimeter Telescope Experiment (ASTE). imaged 950-arcmin2 field down to 1σ sensitivity 0.7–1.3 mJy beam−1 find 125 submillimetre (SMGs) signal-to-noise ratio ≥3.5. Counterpart identification using radio and near/mid-infrared data was performed one or more counterpart candidates were...