A5047736318- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Superconducting and THz Device Technology
- Historical Psychiatry and Medical Practices
- Health Services Management and Policy
- Plant Water Relations and Carbon Dynamics
- Diversity and Career in Medicine
- Global Health Care Issues
- Space Science and Extraterrestrial Life
- American Constitutional Law and Politics
- Bacteriophages and microbial interactions
- Brucella: diagnosis, epidemiology, treatment
- Chronic Disease Management Strategies
- Medical Education and Admissions
- Healthcare Systems and Challenges
- Cardiac Health and Mental Health
- Health and Conflict Studies
- Academic Freedom and Politics
University of Manchester
2018-2024
SKA Observatory
2020-2022
University of Southampton
2019-2020
Durham University
2013-2019
University of Edinburgh
2011-2013
Royal Observatory
2013
UK Astronomy Technology Centre
2011-2013
British Medical Association
1958
University of Birmingham
1958
Birmingham General Hospital
1938
The ALESS survey has followed up on a sample of 122 sub-millimeter sources in the Extended Chandra Deep Field South at 870 μm with Atacama Large Millimeter Array (ALMA), allowing us to pinpoint positions galaxies (SMGs) ∼0.3 arcsec and find their precise counterparts different wavelengths. This enabled first compilation multi-wavelength spectral energy distributions (SEDs) statistically reliable SMGs. In this paper, we present new calibration magphys SED modeling code that is optimized fit...
We exploit ALMA 870um (345GHz) observations of submillimetre sources in the Extended Chandra Deep Field South to investigate far-infrared properties high-redshift galaxies (SMGs). Using precisely located positions 99 SMGs, together with 24um and radio imaging this field, we deblend Herschel/SPIRE region extract their fluxes colours. The median photometric redshifts for LESS (ALESS) SMGs which are detected at least two SPIRE bands increases wavelength peak SEDs, z=2.3+/-0.2, 2.5+/-0.3...
We report the results of a pilot study with EVLA 12CO J=1-0 emission from four SMGs at z=2.2-2.5, each an existing detection CO J=3-2. Using EVLA's most compact configuration we detect strong, broad line all our targets. The median width ratio, sigma(1-0)/sigma(3-2) = 1.15 +/- 0.06, suggests that is more spatially extended than J=3-2 emission, situation confirmed by maps which reveal velocity structure in several cases and typical sizes ~16 kpc FWHM. Tb ratio r(3-2/1-0) 0.55 0.05, noting...
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 have used the Institut de Radioastronomie Millimétrique (IRAM) Plateau Bure Interferometer and Expanded Very Large Array to obtain a high-resolution map of CO(6–5) CO(1–0) emission in lensed, star-forming galaxy SMM J2135−0102 at z = 2.32. The kinematics gas are well described by model rotationally supported disk with an inclination-corrected rotation speed, vrot 320 ± 25 km s−1, ratio rotational-to-dispersion support v/σ 3.5 0.2, dynamical mass (6.0 0.5) × 1010 M☉ within radius 2.5 kpc....
ABSTRACT We analyse the physical properties of a large, homogeneously selected sample ALMA-located sub-millimetre galaxies (SMGs). This survey, AS2UDS, identified 707 SMGs across ∼1 deg2 field, including ∼17 per cent, which are undetected at K ≳ 25.7 mag. interpret their ultraviolet-to-radio data using magphys and determine median redshift z = 2.61 ± 0.08 (1σ range 1.8–3.4) with just ∼6 cent > 4. Our survey provides massive dusty 1, dust stellar masses Md (6.8 0.3) × 108 M⊙ (thus, gas...
We present high-resolution (0.3'') ALMA 870um imaging of 52 sub-millimeter galaxies (SMGs) in the Ultra Deep Survey (UDS) field and investigate size morphology (sub-mm) emission on 2-10kpc scales. derive a median intrinsic angular FWHM=0.30$\pm$0.04'' for 23 SMGs sample detected at signal-to-noise ratio (SNR) >10. Using photometric redshifts we show that this corresponds to physical half-light diameter 2.4$\pm$0.2kpc. A stacking analysis an SNR <10 shows they have sizes consistent with...
We present the first photometric redshift distribution for a large sample of 870 μm submillimeter galaxies (SMGs) with robust identifications based on observations ALMA. In our analysis we consider 96 SMGs in Extended Chandra Deep Field South, 77 which have 4–19 band photometry. model SEDs these SMGs, deriving median zphot = 2.3 ± 0.1. The remaining 19 insufficient photometry to derive redshifts, but stacking Herschel confirms they are not spurious. Assuming that an absolute H-band magnitude...
We present high-resolution 870-um ALMA continuum maps of 30 bright sub-millimeter sources in the UKIDSS UDS field. These are selected from deep, 1-square degrees 850-um SCUBA--2 Cosmology Legacy Survey, and representative brightest field (median SCUBA2 flux S_850=8.7+/-0.4 mJy). detect 52 galaxies (SMGs) at >4-sigma significance our maps. In 61+/-17% single-dish source comprises a blend >=2 SMGs, where secondary SMGs Ultra--Luminous Infrared Galaxies (ULIRGs) with L_IR>10^12 Lo. The SMG...
We present 1-7 GHz high-resolution radio imaging (VLA and e-MERLIN) spatially-resolved ionized gas kinematics for ten z<0.2 type~2 `obscured' quasars (log [L(AGN)/(erg/s)]>~45) with moderate luminosities [L(1.4GHz)/(W/Hz)]=23.3-24.4). These targets were selected to have known outflows based on broad [OIII] emission-line components (FWHM~800-1800 km/s). Although `radio-quiet' not `radio AGN' by many traditional criteria, we show that nine of the targets, star formation likely accounts <~10...
We present the catalogue and basic properties of sources in AS2UDS, an 870-|$\mu$|m continuum survey with Atacama Large Millimetre/sub-millimetre Array (ALMA) 716 single-dish sub-millimetre detected UKIDSS/UDS field by SCUBA-2 Cosmology Legacy Survey. In our sensitive ALMA follow-up observations, we detect 708 galaxies (SMGs) at >4.3σ significance across ∼1°-diameter field. combine precise positions extensive multiwavelength coverage UDS which yields spectral energy distributions for SMGs a...
We present an analysis of the morphology and profiles dust continuum emission in 153 bright sub-millimetre galaxies (SMGs) detected with ALMA at S/N ratios $>8$ high-resolution $0.18''$ ($\sim1$kpc) 870$\mu$m maps. measure sizes, shapes light for rest-frame far-infrared from these luminous star-forming systems derive a median effective radius ($R_e$) $0.10''\pm0.04''$ our sample flux $S_{870}=5.6\pm0.2$mJy. find that apparent axial ratio ($b/a$) distribution SMGs peaks $b/a\sim0.63\pm0.24$...
We present sensitive 850$\mu$m imaging of the COSMOS field using 640hr new and archival observations taken with SCUBA-2 at East Asian Observatory's James Clerk Maxwell Telescope. The survey (S2COSMOS) achieves a median noise level $\sigma_{850\mu{\mathrm{m}}}$=1.2mJy/beam over an area 1.6 sq. degree (MAIN; HST/ACS footprint), $\sigma_{850\mu{\mathrm{m}}}$=1.7mJy/beam additional 1 supplementary (SUPP) coverage. catalogue 1020 127 sources detected significance >4$\sigma$ >4.3$\sigma$ in MAIN...
We analyse a robust sample of 30 near-infrared-faint (K>25.3, 5 sigma) submillimetre galaxies selected across 0.96 deg^2 field, to investigate their properties and the cause lack detectable optical/near-infrared emission. Our analysis exploits precise identifications based on ALMA 870um continuum imaging, combined with very deep near-infrared imaging from UKIDSS-UDS survey. estimate that K>25.3 represent 15+/-2 per cent total population brighter than S870=3.6mJy, an expected surface density...
We present a study of luminous, z=0.15, type-2 quasar (log [L([OIII])/(erg/s)]=42.8) from the Quasar Feedback Survey. It is classified as 'radio-quiet' [L(1.4 GHz)/(W/Hz)]=23.8); however, radio imaging reveals ~1 kpc low-power jets [Pjet/(erg/s)]=44) inclined into plane galaxy disk. combine MUSE and ALMA observations to map stellar kinematics ionised molecular gas properties. The are seen drive galaxy-wide bi-conical turbulent outflows, reaching W80 = 1000-1300 km/s, in phase (traced via...
We present deep high resolution (0.03", 200pc) ALMA Band 7 observations covering the dust continuum and [CII] $\lambda157.7\mu$m emission in four $z\sim4.4-4.8$ sub-millimeter galaxies (SMGs) selected from ALESS AS2UDS surveys. The data show that rest-frame 160$\mu$m (observed 345 GHz) is consistent with smooth morphologies on kpc scales for three of sources. One source, UDS47.0, displays apparent substructure but this also a morphology, as indicated by simulations showing exponential disks...
We present multi-frequency (1–8 GHz) Very Large Array data, combined with VIsible MultiObject Spectrograph integral field unit data and Hubble Space Telescope imaging, of a z = 0.085 radio-quiet type 2 quasar (with L1.4 GHz ≈ 5 × 1023 W Hz−1 LAGN 1045 erg s−1). Due to the morphology its emission-line region, target (J1430+1339) has been referred as "Teacup" active galactic nucleus (AGN) in literature. identify "bubbles" radio emission that are extended ≈10–12 kpc both east west nucleus. The...
Abstract We present a multi-wavelength analysis of 52 submillimeter galaxies (SMGs), identified using ALMA 870 μ m continuum imaging in pilot program to precisely locate bright SCUBA-2-selected sources the UKIDSS Ultra Deep Survey (UDS) field. Using available deep (especially near-infrared) panoramic UDS field at optical-to-radio wavelengths we characterize key properties SMG population. The median photometric redshift ALMA/SCUBA-2 (AS2UDS) SMGs that are detected sufficient number wavebands...
Abstract We combine high-resolution ALMA and HST /CANDELS observations of 20 submillimeter galaxies (SMGs), predominantly from the AS2UDS survey at z ≃ 2, with bright rest-frame optical counterparts ( <?CDATA ${K}_{{\rm{s}}}\lesssim 22.9$?> ) to investigate resolved structural properties their dust stellar components. derive two-dimensional stellar-mass distributions that are inferred spatial mass-to-light ratio ${\text{}}M/{L}^{* }$?> corrections based on colors. Due high central column...
ABSTRACT We use a sample of powerful $z\, \approx \, 0.1$ type 2 quasars (‘obscured’; log [LAGN/erg s$^{-1}]\, \gtrsim 45$), which host kpc-scale ionized outflows and jets, to identify possible signatures AGN feedback on the total molecular gas reservoirs their galaxies. Specifically, we present Atacama Pathfinder EXperiment (APEX) observations CO(2–1) transition for nine sources CO(6–5) subset three. find that majority our reside in starburst galaxies (average specific star formation rates...
We analyse new SCUBA-2 submillimeter and archival SPIRE far-infrared imaging of a z=1.62 cluster, Cl0218.3-0510, which lies in the UKIDSS/UDS field Cosmology Legacy Survey. Combining these tracers obscured star formation activity with extensive photometric spectroscopic information available for this field, we identify 31 far-infrared/submillimeter-detected probable cluster members bolometric luminosities >1e12 Lo show that by virtue their dust content activity, represent some reddest...
We present a study of the radio properties 870$\mu$m-selected submillimetre galaxies (SMGs), observed at high resolution with ALMA in Extended Chandra Deep Field South. From our initial sample 76 SMGs, we detect 52 SMGs $>3\sigma$ significance VLA 1400MHz imaging, which 35 are also detected new 610MHz GMRT imaging. Within this radio-detected measure median spectral index $\alpha_{610}^{1400} = -0.79 \pm 0.06$, (with inter-quartile range $\alpha=[-1.16,-0.56]$) and investigate...
ABSTRACT We present the first results from Quasar Feedback Survey, a sample of 42 z &lt; 0.2, [O iii] luminous AGNs ( L[O III] &gt; 1042.1 ergs s−1) with moderate radio luminosities (i.e. L1.4GHz 1023.4 W Hz−1; median = 5.9 × 1023 Hz−1). Using high spatial resolution (∼0.3–1 arcsec), 1.5–6 GHz images Very Large Array, we find that 67 per cent have spatially extended features on ∼1–60 kpc scales. The sizes and morphologies suggest these may be lower luminosity versions compact,...