A5037592992- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Superconducting and THz Device Technology
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Astrophysical Phenomena and Observations
- Dark Matter and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Adaptive optics and wavefront sensing
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- CCD and CMOS Imaging Sensors
- Planetary Science and Exploration
- History and Developments in Astronomy
- Spectroscopy and Laser Applications
- Particle physics theoretical and experimental studies
- Remote Sensing in Agriculture
- Photonic and Optical Devices
California Institute of Technology
2011-2024
Australian Astronomical Observatory
2024
Macquarie University
2024
Rochester Institute of Technology
2015-2024
Jet Propulsion Laboratory
2014-2023
University of Rochester
2021
University of Hawaiʻi at Mānoa
2019
National Aeronautics and Space Administration
2010-2018
University of Chicago
2018
University of Groningen
2018
We exploit the deep and extended far infrared data sets (at 70, 100 160 um) of Herschel GTO PACS Evolutionary Probe (PEP) Survey, in combination with HERschel Multi tiered Extragalactic Survey (HerMES) at 250, 350 500 um, to derive evolution restframe 35 60 90 total (IR) luminosity functions (LFs) up z~4. detect very strong for IR LF combined a density evolution. In agreement previous findings, increases steeply z~1, then flattens between z~1 z~3 decrease z greater than 3. Galaxies different...
Gravitational lensing of the cosmic microwave background generates a curl pattern in observed polarization. This "B-mode" signal provides measure projected mass distribution over entire observable Universe and also acts as contaminant for measurement primordial gravity-wave signals. In this Letter we present first detection gravitational B modes, using first-season data from polarization-sensitive receiver on South Pole Telescope (SPTpol). We construct template B-mode by combining E-mode...
We present a catalogue of nearly 3,000 submillimetre sources detected at 850um over ~5 square degrees surveyed as part the James Clerk Maxwell Telescope (JCMT) SCUBA-2 Cosmology Legacy Survey (S2CLS). This is largest survey its kind 850um, probing meaningful cosmic volume peak star formation activity and increasing sample size galaxies selected by an order magnitude. describe wide component S2CLS, which covers key extragalactic fields: UKIDSS-UDS, COSMOS, Akari-NEP, Extended Groth Strip,...
We report on the sensitivity of SPIRE photometers <i>Herschel<i/> Space Observatory. Specifically, we measure confusion noise from observations taken during science demonstration phase Multi-tiered Extragalactic Survey. Confusion is defined to be spatial variation sky intensity in limit infinite integration time, and found consistent among different fields our survey at level 5.8, 6.3 6.8 mJy/beam 250, 350 500 <i>μ<i/>m, respectively. These results, together with measured instrument noise,...
SPIRE, the Spectral and Photometric Imaging REceiver, is <i>Herschel<i/> Space Observatory's submillimetre camera spectrometer. It contains a three-band imaging photometer operating at 250, 350 500 <i>μ<i/>m, an Fourier-transform spectrometer (FTS) covering 194–671 <i>μ<i/>m (447-1550 GHz). In this paper we describe initial approach taken to absolute calibration of SPIRE instrument using combination emission from telescope itself modelled continuum solar system objects other astronomical...
ABRIGED Herschel/SPIRE has provided confusion limited maps of deep fields at 250, 350, and 500um, as part the HerMES survey. Due to confusion, only a small fraction Cosmic Infrared Background can be resolved into individually-detected sources. Our goal is produce galaxy number counts redshift distributions below limit, which we then use place strong constraints on origins cosmic infrared background models evolution. We individually extracted bright SPIRE with method using positions, flux...
We present an improved analysis of the final dataset from QUaD experiment. Using technique to remove ground contamination, we double effective sky area and hence increase precision our CMB power spectrum measurements by ~30% versus that previously reported. In addition, have modeling instrument beams reduced absolute calibration uncertainty 5% 3.5% in temperature. The robustness results is confirmed through extensive jackknife tests way agreement find between two fully independent pipelines....
Emission at far-infrared wavelengths makes up a significant fraction of the total light detected from galaxies over age Universe. Herschel provides an opportunity for studying peak wavelength their emission. Our aim is to provide benchmark models galaxy population evolution and test pre-existing galaxies. With Multi-tiered Extra-galactic survey, HerMES, we have observed number fields different areas sensitivity using SPIRE instrument on Herschel. We determined counts down ~20 mJy....
The atomic C ii fine-structure line is one of the brightest lines in a typical star-forming galaxy spectrum with luminosity ∼0.1%–1% bolometric luminosity. It potentially reliable tracer dense gas distribution at high redshifts and could provide an additional probe to era reionization. By taking into account spontaneous, stimulated, collisional emission line, we calculate spin temperature mean intensity as function redshift. When averaged over cosmologically large volume, find that from...
We present the cross-identification and source photometry techniques used to process Herschel SPIRE imaging taken as part of Multi-Tiered Extragalactic Survey (HerMES). Cross-identifications are performed in map-space so minimise blending effects. make use a combination linear inversion model selection produce reliable catalogues based on Spitzer MIPS 24 micron positions. Testing simulations real observations show that this approach gives robust results for even faintest sources S250~10 mJy....
Nuclear and starburst activity are known to often occur concomitantly. Herschel-SPIRE provides sampling of the FIR SEDs type 1 2 AGN, allowing for separation between hot dust (torus) cold (starburst) emission. We study large samples spectroscopically confirmed AGN lying within Herschel Multi-tiered Extragalactic Survey (HerMES) fields observed during science demonstration phase, aiming understand their colour distributions constrain contributions. find that one third in HerMES have 5-sigma...
We present a list of 13 candidate gravitationally lensed submillimeter galaxies (SMGs) from 95 deg2 the Herschel Multi-tiered Extragalactic Survey, surface density 0.14 ± 0.04 deg−2. The selected sources have 500 μm flux densities (S500) greater than 100 mJy. Gravitational lensing is confirmed by follow-up observations in 9 systems (70%), and status four remaining undetermined. also supplementary sample 29 (0.31 0.06 deg−2) SMG candidates with S500 = 80–100 mJy, which are expected to contain...
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%)...
We present measurements of the auto- and cross-frequency power spectra cosmic infrared background (CIB) at 250, 350, 500 μm (1200, 860, 600 GHz) from observations totaling ∼70 deg2 made with SPIRE instrument aboard Herschel Space Observatory. measure a fractional anisotropy δI/I = 14% ± 4%, detecting signatures arising clustering dusty star-forming galaxies in both linear (2-halo) nonlinear (1-halo) regimes; that transition 2- to 1-halo terms, below which originates predominantly multiple...
We study the link between observed ultraviolet luminosity, stellar mass, and dust attenuation within rest-frame UV-selected samples at z~ 4, 3, 1.5. measure by stacking 250, 350, 500 um in Herschel/SPIRE images from HerMES program average infrared luminosity as a function of mass UV luminosity. find that is mostly correlated with mass. There also secondary dependence luminosity: given increases while it decreases provide new empirical recipes to correct for Our results enable us put...
Extragalactic background light (EBL) anisotropy traces variations in the total production of photons over cosmic history, and may contain faint, extended components missed galaxy point source surveys. Infrared EBL fluctuations have been attributed to primordial galaxies black holes at epoch reionization (EOR), or alternately, intra-halo (IHL) from stars tidally stripped their parent low redshift. We report new measurements a specialized sounding rocket experiment 1.1 1.6 micrometers. The...
The first deep blank-field 450um map (1-sigma~1.3mJy) from the SCUBA-2 Cosmology Legacy Survey (S2CLS), conducted with James Clerk Maxwell Telescope (JCMT) is presented. Our covers 140 arcmin^2 of COSMOS field, in footprint HST CANDELS area. Using 60 submillimetre galaxies (SMGs) detected at >3.75-sigma, we evaluate number counts 450um-selected flux densities S_450>5mJy. 8-arcsec JCMT beam and high sensitivity now make it possible to directly resolve a larger fraction cosmic infrared...
We present a method for selecting $z>4$ dusty, star forming galaxies (DSFGs) using Herschel/SPIRE 250/350/500 $\mu m$ flux densities to search red sources. apply this 21 deg$^2$ of data from the HerMES survey produce catalog 38 high-$z$ candidates. Follow-up first 5 these sources confirms that is efficient at DSFGs, with 4/5 $z=4.3$ $6.3$ (and remaining source $z=3.4$), and they are some most luminous dusty known. Comparison previous DSFG samples, mostly selected longer wavelengths (e.g.,...
We present physical properties [redshifts (z), star-formation rates (SFRs) and stellar masses (Mstar)] of bright (S850>4mJy) submm galaxies in the ~2deg2 COSMOS UDS fields selected with SCUBA-2/JCMT. complete galaxy identification process for all (~2000) S/N>3.5 850-um sources, but focus our scientific analysis on a high-quality sub-sample 651 S/N>4 sources multi-wavelength coverage including 1.1-mm imaging. check reliability identifications, robustness SCUBA-2 fluxes by revisiting recent...
We report results from the second and third seasons of observation with QUaD experiment. Angular power spectra Cosmic Microwave Background are derived for both temperature polarization at 100 GHz 150 GHz, as cross frequency spectra. All subjected to an extensive set jackknife tests probe possible systematic contamination. For implemented data cuts processing technique such contamination is undetectable. analyze difference map formed between bands find no evidence foreground in polarization....
We constrain parity-violating interactions to the surface of last scattering using spectra from QUaD experiment's second and third seasons observations by searching for a possible systematic rotation polarization directions cosmic microwave background photons. measure angle due such "cosmological birefringence" be 0.55 degrees +/-0.82 (random) +/-0.5 (systematic) QUaD's 100 150 GHz temperature-curl gradient-curl over multipole range 200<l<2000, consistent with null, Lorentz-violating <2 x...
We investigate the potential of submm–mm and submm–mm–radio photometric redshifts using a sample mm-selected sources as seen at 250, 350 500μm by SPIRE instrument on Herschel. From 63 previously identified mm with reliable radio identifications in Great Observatories Origins Deep Survey North Lockman Hole fields, 46 (73 per cent) are found to have detections least one band. explore observed submm/mm colour evolution redshift, finding that colours adequately described modified blackbody...