A5058741096- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Superconducting and THz Device Technology
- Adaptive optics and wavefront sensing
- Molecular Spectroscopy and Structure
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Historical and Cultural Studies of Poland
- Integrated Water Resources Management
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Remote Sensing in Agriculture
- CCD and CMOS Imaging Sensors
- Spectroscopy Techniques in Biomedical and Chemical Research
- Botany and Plant Ecology Studies
- Advanced Vision and Imaging
Nicolaus Copernicus University
2014-2024
University of Hertfordshire
2016-2020
Institute of Physics
2020
Max Planck Institute for Astronomy
2019
Max Planck Society
2019
Scottish Universities Physics Alliance
2015-2017
University of Edinburgh
2013-2017
Royal Observatory
2013-2017
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 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 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 present a new measurement of the evolving galaxy far-IR luminosity function (LF) extending out to redshifts z~5, with resulting implications for level dust-obscured star-formation density in young Universe. To achieve this we have exploited recent advances sub-mm/mm imaging SCUBA-2 on James Clerk Maxwell Telescope (JCMT) and Atacama Large Millimeter/Submillimeter Array (ALMA), which together provide unconfused sufficient dynamic range meaningful coverage luminosity-redshift plane z>4. Our...
Long gamma-ray bursts (GRBs), among the most energetic events in Universe, are explosions of massive and short-lived stars, so they pinpoint locations recent star formation. However, several GRB host galaxies have recently been found to be deficient molecular gas (H2), believed fuel Moreover, optical spectroscopy afterglows implies that phase constitutes only a small fraction along line-of-sight. Here we report first ever 21 cm line observations galaxies, using Australia Telescope Compact...
We investigate the properties of galaxies selected from deepest 850-µm survey undertaken to date with (Submillimetre Common-User Bolometer Array 2) SCUBA-2 on James Clerk Maxwell Telescope as part Cosmology Legacy Survey.A total 106 sources (>5σ ) were uncovered at 850 µm an area 150 arcmin 2 in centre COSMOS/UltraVISTA/Cosmic Assembly Near-infrared Deep Extragalactic Survey (CANDELS) field, imaged a typical depth σ 0.25 mJy.We utilize available multifrequency data identify galaxy...
Motivated by the current controversy over redshift distribution and physical properties of luminous (sub-)mm sources, we have undertaken a new study brightest sample unlensed sources with pre-ALMA interferometric followup in COSMOS field.Exploiting very latest multi-frequency supporting data, find that this displays indistinguishable from lensed uncovered South Pole Telescope (SPT), z median ≃ 3.5.We also that, range 2 -6 stellar mass most is M ⋆ 3 × 10 11 ⊙ , yielding typical specific...
We use a sample of 4178 Lyman break galaxies (LBGs) at z = 3, 4 and 5 in the UKIRT Infrared Deep Sky Survey (UKIDSS) Ultra (UDS) field to investigate relationship between observed slope stellar continuum emission ultraviolet, {\beta}, thermal dust emission, as quantified via so-called 'infrared excess' (IRX LIR/LUV). Through stacking analysis we directly measure 850-{\mu}m flux density LBGs our deep (0.9mJy) James Clerk Maxwell Telescope (JCMT) SCUBA-2 map, well public Herschel/SPIRE 250-,...
Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission galaxyof closest known GRB 980425 at z = 0.0085 using our new high-resolution observations from Herschel, Atacama Pathfinder Experiment (APEX), Large Millimeter Array (ALMA) Australia...
We analyse the physical properties of 121 SNR $\geq$ 5 sub-millimetre galaxies (SMGs) from STUDIES 450-$\mu$m survey. model their UV-to-radio spectral energy distributions using MAGPHYS+photo-$z$ and compare results to similar modelling 850-$\mu$m-selected SMG sample AS2UDS, understand fundamental differences between two populations at observed depths. The redshift distribution has a median $z$ = 1.85 $\pm$ 0.12 can be described by strong evolution far-infrared luminosity function. fainter...
ABSTRACT We present $850\, \mu {\rm m}$ imaging of the XMM-LSS field observed for 170 h as part James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS maps an area $9\, deg}^2$, reaching a moderate depth $1\sigma \simeq 4\, mJy\, beam^{-1}}$. This is largest contiguous extragalactic sky mapped by (JCMT) at to date. The wide survey allows us probe ultra-bright ($S_{\rm 850\mu m}\gtrsim 15\, mJy}$), yet rare submillimetre population. catalogue, which comprises 40...
We report the detection at 850 μm of central source in SSA22-LAB1, archetypal "Lyman-α Blob" (LAB), a 100 kpc scale radio-quiet emission-line nebula z = 3.1. The flux density source, S850 4.6 ± 1.1 mJy, implies presence galaxy or group galaxies with total luminosity LIR ≈ 1012 L☉. position an active center ∼50 radius ring linearly polarized Lyα emission detected by Hayes et al. suggests that is leaking photons preferentially plane sky, which undergo scattering H i clouds large galactocentric...
Abstract Understanding how galaxies quench their star formation is crucial for studies of galaxy evolution. Quenching related to a decrease cold gas. In the first paper we showed that dust removal timescale in early-type (ETGs) about 2.5 Gyr. Here present carbon monoxide and 21 cm hydrogen line observations these measure interstellar medium (ISM). We find all ISM components (dust molecular atomic gas) decline at similar rates. This allows us rule out wide range potential ISM-removal...
We have observed the dust continuum of ten z=3.1 Lyman Break Galaxies with Atacama Large Millimeter/Submillimeter Array at ~450 mas resolution in Band 7. detect and resolve 870um emission one targets an integrated flux density S(870)=(192+/-57) uJy, measure a stacked 3-sigma signal S(870)=(67+/-23) uJy for remaining nine. The total infrared luminosities estimated from full spectral energy distribution fits are L(8-1000um)=(8.4+/-2.3)x10^10 Lsun detection L(8-1000um)=(2.9+/-0.9)x10^10 stack....
ABSTRACT We present an 850-μm mosaic map and extracted catalogue of submillimetre sources in the extended North Ecliptic Pole (NEP) region over about 2 deg2. The is constructed using newly obtained observations by SCUBA-2 at East Asian Observatory’s James Clerk Maxwell Telescope, carried out observatory’s large programme opportunities. recent survey has data coverage almost a factor 4 compared to previous surveys, with depth $\sigma _\text{rms}\, {=}\, 1.0$–$2.3\, {\rm mJy}\, beam}^{-1}$....
We present the multi-wavelength counterparts of 850-$\mu$m selected submillimetre sources over a 2-deg$^2$ field centred on North Ecliptic Pole. In order to overcome large beam size (15 arcsec) images, deep optical near-infrared (NIR) photometric data and arcsecond-resolution 20-cm images are used identify sources. Among 647 sources, we 514 reliable for 449 (69 per cent in number), based either probabilities chance associations calculated from positional offsets or combined with...
ABSTRACT Bright galaxies at submillimetre wavelengths from Herschel are now well known to be predominantly strongly gravitationally lensed. The same models that successfully predicted this lensed population also predict about 1 per cent of faint 450 μm-selected deep James Clerk Maxwell Telescope (JCMT) surveys will Follow-up ALMA campaigns have so far found one potential lens candidate, but without clear compelling evidence, for example, lensing arcs. Here, we report the discovery a...
We present a new determination of the star-forming main sequence (MS), obtained through stacking 100k K-band-selected galaxies in far-IR Herschel and James Clerk Maxwell Telescope (JCMT) imaging. By fitting dust emission curve to stacked photometry, we derive IR luminosities (LIR) and, hence, star formation rates (SFR) out z~7. The functional form MS is found, with linear SFR-M* relation that flattens at high stellar masses normalization increases exponentially redshift. corresponding...
Core-collapse supernovae are explosions of massive stars at the end their evolution. They responsible for metal production and halting star formation, having a significant impact on galaxy The details these processes depend nature supernova progenitors, but it is unclear if Type Ic (without hydrogen or helium lines in spectra) originate from core-collapses very (> 30 Msun) less binary systems. Here we show that II (with lines) located environments with similar molecular gas densities,...
We present a new determination of the star-forming main sequence (MS), obtained through stacking 100k $K$-band-selected galaxies in far-infrared (FIR) Herschel and James Clerk Maxwell Telescope (JCMT) imaging. By fitting dust emission curve to stacked FIR photometry, we derive IR luminosities ($L_ $), hence star formation rates (SFRs) out $z 5.7$. The functional form MS is found, with linear SFR-$M_ relation that flattens at high stellar masses normalization increases exponentially redshift....
Context . Long gamma-ray bursts (GRBs) can potentially be used as a tool to study star formation and recent gas accretion onto galaxies. However, the information about properties of GRB hosts is scarce. In particular, very few carbon monoxide (CO) line detections individual have been reported. It has also suggested that lower molecular masses than expected from their rates (SFRs). Aims The objectives this paper are analyse first substantial sample test whether they deficient in gas. Methods...
We analyse 870um Atacama Large Millimetre Array (ALMA) dust continuum detections of 41 canonically-selected z~3 Lyman-break galaxies (LBGs), as well 209 ALMA-undetected LBGs, in follow-up SCUBA-2 mapping the UKIDSS Ultra Deep Survey (UDS) field. find that our ALMA-bright LBGs lie significantly off locally calibrated IRX-beta relation and tend to have relatively bluer rest-frame UV slopes (as parametrised by beta), given their high values 'infrared excess' (IRX=L_IR/L_UV), relative average...
We analyze an extremely deep 450-$\mu$m image ($1\sigma=0.56$\,mJy\,beam$^{-1}$) of a $\simeq 300$\,arcmin$^{2}$ area in the CANDELS/COSMOS field as part SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES). select robust (signal-to-noise ratio $\geqslant 4$) and flux-limited ($\geqslant 4$\,mJy) sample 164 sub-millimeter galaxies (SMGs) at that have $K$-band counterparts COSMOS2015 catalog identified from radio or mid-infrared imaging. Utilizing this SMG 4705 $K$-band-selected non-SMGs reside...
Abstract We present confusion-limited SCUBA-2 450 μ m observations in the COSMOS-CANDELS region as part of James Clerk Maxwell Telescope Large Program Ultra Deep Imaging EAO Survey. Our maps at and 850 cover an area arcmin 2 . achieved instrumental noise levels σ = 0.59 mJy beam −1 0.09 deepest each map. The corresponding confusion are estimated to be 0.65 0.36 Above 4 (3.5 ) threshold, we detected 360 (479) sources 237 (314) m. derive blank-field number counts m, covering flux-density range...
Abstract We construct a SCUBA-2 450 μ m map in the COSMOS field that covers an area of 300 arcmin 2 and reaches 1 σ noise level 0.65 mJy deepest region. extract 256 sources detected at with signal-to-noise ratios >4.0 analyze physical properties their multiwavelength counterparts. find most are z ≲ 3, median <?CDATA $z={1.79}_{-0.15}^{+0.03} \% $?> . About ${35}_{-25}^{+32} our classified as starburst galaxies based on total star formation rates (SFRs) stellar masses ( M * ). By fitting...