G. W. Wilson
A5075144498- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Microwave Engineering and Waveguides
- Physics of Superconductivity and Magnetism
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Molecular Spectroscopy and Structure
- Thermal Radiation and Cooling Technologies
- Antenna Design and Optimization
- Nuclear physics research studies
- Photonic and Optical Devices
- Advanced Antenna and Metasurface Technologies
- Calibration and Measurement Techniques
- Advanced Measurement and Metrology Techniques
University of Massachusetts Amherst
2015-2024
Argonne National Laboratory
2020-2024
Louisiana State University
2020-2024
Harefield Hospital
2023
Guy's and St Thomas' NHS Foundation Trust
2023
Johns Hopkins Medicine
2022-2023
Johns Hopkins University
2022-2023
University of Massachusetts Boston
2015
National Institute of Astrophysics, Optics and Electronics
2012
Goddard Space Flight Center
2000-2011
We present the deepest 100 to 500 μm far-infrared observations obtained with Herschel Space Observatory as part of GOODS-Herschel key program, and examine infrared (IR) 3–500 spectral energy distributions (SEDs) galaxies at 0 < z 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, AKARI data. determine projected star formation densities their radio mid-IR continuum sizes.
We present constraints on cosmological and astrophysical parameters from high-resolution microwave background maps at 148 GHz 218 made by the Atacama Cosmology Telescope (ACT) in three seasons of observations 2008 to 2010. A model primary secondary foreground is fit map power spectra lensing deflection spectrum, including contributions both thermal Sunyaev-Zeldovich (tSZ) effect kinematic (kSZ) effect, Poisson correlated anisotropy unresolved infrared sources, radio correlation between tSZ...
We present the results of first, deep Atacama Large Millimeter Array (ALMA) imaging covering full ≃4.5 arcmin2 Hubble Ultra Deep Field (HUDF) imaged with Wide Camera 3/IR on HST. Using a 45-pointing mosaic, we have obtained homogeneous 1.3-mm image reaching σ1.3 ≃ 35 μJy, at resolution ≃0.7 arcsec. From an initial list ≃50 > 3.5σ peaks, rigorous analysis confirms 16 sources S1.3 120 μJy. All these secure galaxy counterparts robust redshifts (〈z〉 = 2.15). Due to unparalleled supporting data,...
We present results from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) photometric redshift methods investigation. In this investigation, eleven participants, each using a different combination of code, template spectral energy distributions (SEDs) and priors, are used to examine properties redshifts applied deep fields with broad-band multi-wavelength coverage. The photometry includes U-band through mid-infrared filters was derived TFIT method. Comparing...
We report on 23 clusters detected blindly as Sunyaev–ZEL'DOVICH (SZ) decrements in a 148 GHz, 455 deg2 map of the southern sky made with data from Atacama Cosmology Telescope 2008 observing season. All SZ detections announced this work have confirmed optical counterparts. Ten are new discoveries. One newly discovered cluster, ACT-CL J0102−4915, redshift 0.75 (photometric), has an decrement comparable to most massive systems at lower redshifts. Simulations cluster recovery method reproduce...
One puzzle in understanding how stars form clusters is the source of mass—is all mass place before first are born, or there an extended period when cluster accretes material which can continuously fuel star formation process? We use a multi-line spectral survey southern filament associated with Serpens South embedded cluster-forming region order to determine if accreting from onto cluster, and whether accretion rate significant. Our analysis suggests that flowing along filament's long axis...
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...
Abstract We present a “super-deblended” far-infrared (FIR) to (sub)millimeter photometric catalog in the Cosmic Evolution Survey (COSMOS), prepared with method recently developed by Liu et al., key adaptations. obtain point-spread function fitting photometry at fixed prior positions including 88,008 galaxies detected VLA 1.4, 3 GHz, and/or MIPS 24 μ m images. By adding specifically carved mass-selected sample (with an evolving stellar mass limit), highly complete of 194,428 is achieved for...
We quantify the fraction of cosmic infrared background (CIB) that originates from galaxies identified in UV/optical/near-infrared by stacking 81,250 (∼35.7 arcmin−2) K-selected sources (KAB < 24.0) split according to their rest-frame U − V versus J colors into 72,216 star-forming and 9034 quiescent galaxies, on maps Spitzer/MIPS (24 μm), Herschel/PACS (100, 160 Herschel/SPIRE (250, 350, 500 AzTEC (1100 μm). The CIB resolved our catalog is (69% ± 15%) at 24 μm, (78% 17%) 70 (58% 13%) 100 18%)...
AzTEC is a mm-wavelength bolometric camera utilizing 144 silicon nitride micromesh detectors. Herein we describe the instrument architecture and its use as an astronomical instrument. We report on several performance metrics measured during three month observing campaign at James Clerk Maxwell Telescope, conclude with our plans for facility Large Millimeter Telescope.
We present 70 and 160 μm observations from the Spitzer extragalactic First Look Survey (xFLS). The data reduction techniques methods for producing co-added mosaics source catalogs are discussed. Currently, 26% of sample 49% μm–selected sources have redshifts. majority with redshifts star-forming galaxies at z < 0.5, while about 5% infrared colors consistent active galactic nuclei. observed agree spectral energy distributions (SEDs) local previously determined IRAS Infrared Space Observatory...
We present the first results from largest deep extragalactic millimetre-wavelength survey undertaken to date. These are derived maps covering over 0.7 deg^2, made at 1.1mm, using AzTEC continuum camera mounted on James Clerk Maxwell Telescope. The were in two fields originally targeted 0.85mm with SCUBA SHADES project, namely Lockman Hole East (mapped a depth of 0.9-1.3 mJy rms) and Subaru XMM Deep Field (1.0-1.7 rms). wealth existing forthcoming multi-frequency data these will allow bright...
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 report the spectroscopic confirmation of a submillimeter galaxy (SMG) at z = 4.547 with an estimated LIR (0.5-2.0) × 1013 L☉. The spectra, mid-IR, and X-ray properties indicate bolometric luminosity is dominated by star formation rate >1000 M☉ yr−1. Multiple, spatially separated components are visible in Lyα line observed velocity difference up to 380 km s−1 object morphology indicates merger. best-fit spectral energy distribution indicators suggest 2-8 Myr old contains >1010 stellar...
We present a measurement of the angular power spectrum cosmic microwave background (CMB) radiation observed at 148 GHz. The uses maps with 1.4' resolution made data from Atacama Cosmology Telescope (ACT). observations cover 228 square degrees southern sky, in 4.2-degree-wide strip centered on declination 53 South. CMB arcminute scales is particularly sensitive to Silk damping scale, Sunyaev-Zel'dovich (SZ) effect galaxy clusters, and emission by radio sources dusty galaxies. After masking...
We present a 0.72 deg2 contiguous 1.1-mm survey in the central area of Cosmological Evolution Survey field carried out to 1σ≈ 1.26 mJy beam−1 depth with AzTEC camera mounted on 10-m Atacama Submillimeter Telescope Experiment. have uncovered 189 candidate sources at signal-to-noise ratio (S/N) ≥ 3.5, which 129, S/N 4, can be considered little chance being spurious (≲2 per cent). number counts derived this survey, show significant excess when compared from ∼0.5 sampled similar depths...
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...
The Serpens South embedded cluster, which is located in the constricted part of a long, filamentary, infrared dark cloud, believed to be very early stage cluster formation. We present results near-infrared (JHKs) polarization observations filamentary cloud. Our measurements point sources indicate well-ordered global magnetic field that perpendicular main filament, implying likely have controlled formation filament. On other hand, sub-filaments, converge on central tend run along field....
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 a description of the data reduction and mapmaking pipeline used for 2008 observing season Atacama Cosmology Telescope (ACT). The presented here at 148 GHz represent 12% 90 TB collected by ACT from 2007 to 2010. In we observed 136 days, producing total 1423 hours (11 band only), with daily average 10.5 observation. From these, 1085 were devoted 850 deg^2 stripe (11.2 9.1 deg) centered on declination -52.7 deg, while 175 280 (4.5 4.8 celestial equator. discuss sources statistical...