The Tiered Radio Extragalactic Continuum Simulation (T-RECS)

Bonaldi, A.; Bonato, M.; Galluzzi, Vincenzo; Harrison, I.; Massardi, M.; Kay, Scott T.; Zotti, G. de; Brown, Michael L.

doi:10.1093/mnras/sty2603

Cited by 120 publications

(233 citation statements)

References 220 publications

(356 reference statements)

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“…ure 7) from the Tiered Radio Extragalactic Continuum Simulation (T-RECS) byBonaldi et al (2019) who modeled the corresponding sub-populations, over the 150 MHz -20 GHz range. Our results concurs with the results of these models from literature, especially to theMancuso et al (2017) andBonaldi et al (2019) models at high luminosities. Note, however, that in the first two redshift bins the faint end of theMancuso et al (2017) models is lower than that of our SFG LF.…”

mentioning

confidence: 99%

Cosmic evolution of star-forming galaxies to z ≃ 1.8 in the faint low-frequency radio source population

Ocran

Taylor

Vaccari

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We study the properties of star-forming galaxies selected at 610 MHz with the GMRT in a survey covering ∼1.86 deg 2 down to a noise of ∼7.1 µJy / beam. These were identified by combining multiple classification diagnostics: optical, X-ray, infrared and radio data. Of the 1685 SFGs from the GMRT sample, 496 have spectroscopic redshifts whereas 1189 have photometric redshifts. We find that the IRRC of star-forming galaxies, quantified by the infrared-to-1.4 GHz radio luminosity ratio q IR , decreases with increasing redshift: q IR = 2.86 ± 0.04(1 + z) −0.20±0.02 out to z ∼ 1.8. We use the V/V max statistic to quantify the evolution of the co-moving space density of the SFG sample. Averaged over luminosity our results indicate V/V max to be 0.51 ± 0.06, which is consistent with no evolution in overall space density. However we find V/V max to be a function of radio luminosity, indicating strong luminosity evolution with redshift. We explore the evolution of the SFGs radio luminosity function by separating the source into five redshift bins and comparing to theoretical model predictions. We find a strong redshift trend that can be fitted with a pure luminosity evolution of the form L 610 MHz ∝ ( 1 + z) (2.95±0.19)−(0.50±0.15)z . We calculate the cosmic SFR density since z ∼ 1.5 by integrating the parametric fits of the evolved 610 MHz luminosity function. Our sample reproduces the expected steep decline in the star formation rate density since z ∼ 1.

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confidence: 99%

Cosmic evolution of star-forming galaxies to z ≃ 1.8 in the faint low-frequency radio source population

Ocran

Taylor

Vaccari

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…For our population model we use the Tiered-Radio Extragalactic Continuum Simulation (T-RECS) of Bonaldi et al (2019). This is a new simulation of the radio sky in continuum, which reproduces the most recent compilation of data in terms of number counts, luminosity functions and redshift distributions over the 150 MHz -20 GHz range.…”

Section: Population Modelmentioning

confidence: 99%

“…17), we identify three for scientific exploitation. We use the recovered CLEAN beam major axis size and RMS noise for each image, and cut the T-RECS (Bonaldi et al 2019) catalogue to find the total number of sources which will be resolved (have sizes larger than the beam major axis) and detected (have fluxes greater than five times the RMS noise value) by each choice of weighting. From this procedure we chose the 'Max N gal ' weighting as the one which returns the highest total of detectable, resolvable galaxies, and the 'Edge of knee' weighting, which has a lower number of usable galaxies than Max N gal but is smaller, sitting at the edge of a drop off in sensitivity with decreasing beam size.…”

Section: Demonstration Of Data Combination From Different Telescopesmentioning

confidence: 99%

SuperCLASS – III. Weak lensing from radio and optical observations in Data Release 1

Harrison

Brown

Tunbridge

et al. 2020

Monthly Notices of the Royal Astronomical Society

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We describe the first results on weak gravitational lensing from the SuperCLASS survey: the first survey specifically designed to measure the weak lensing effect in radiowavelength data, both alone and in cross-correlation with optical data. We analyse 1.53 deg 2 of optical data from the Subaru telescope and 0.26 deg 2 of radio data from the e-MERLIN and VLA telescopes (the DR1 data set). Using standard methodologies on the optical data only we make a significant (10σ) detection of the weak lensing signal (a shear power spectrum) due to the massive supercluster of galaxies in the targeted region. For the radio data we develop a new method to measure the shapes of galaxies from the interferometric data, and we construct a simulation pipeline to validate this method. We then apply this analysis to our radio observations, treating the e-MERLIN and VLA data independently. We achieve source densities of 0.5 arcmin −2 in the VLA data and 0.06 arcmin −2 in the e-MERLIN data, numbers which prove too small to allow a detection of a weak lensing signal in either the radio data alone or in crosscorrelation with the optical data. Finally, we show preliminary results from a visibilityplane combination of the data from e-MERLIN and VLA which will be used for the forthcoming full SuperCLASS data release. This approach to data combination is expected to enhance both the number density of weak lensing sources available, and the fidelity with which their shapes can be measured.

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“…Bars represent the square root of the number of baselines of a given length, whilst the dashed line is the shear signal expected on these Fourier scales when observing at 1.4 GHz. The shear signal is constructed as the difference between sky models of T-RECS sources (see Bonaldi et al 2019) with and without shape changes due to the simulated effect of weak gravitational lensing expected for a typical supercluster of galaxies.…”

Section: Survey Designmentioning

confidence: 99%

“…To confirm these simple simulations we also run our full simulation pipeline (as created for the weak lensing science and described in Paper III), consisting of a source fluxsize population model from the T-RECS simulation (Bonaldi et al 2019), uv-data creation and imaging, and measurement of aperture fluxes. We do this with two sky models, one in which all sources are point sources (Figure 12, left panel) Figure 8.…”

Section: Source Sizesmentioning

confidence: 99%

SuperCLASS – I. The super cluster assisted shear survey: Project overview and data release 1

Battye¹,

Brown²,

Casey

et al. 2020

Monthly Notices of the Royal Astronomical Society

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The SuperCLuster Assisted Shear Survey (SuperCLASS) is a legacy programme using the e-MERLIN interferometric array. The aim is to observe the sky at L-band (1.4 GHz) to a r.m.s. of 7 µJy beam −1 over an area of ∼ 1 deg 2 centred on the Abell 981 supercluster. The main scientific objectives of the project are: (i) to detect the effects of weak lensing in the radio in preparation for similar measurements with the Square Kilometre Array (SKA); (ii) an extinction free census of star formation and AGN activity out to z ∼ 1. In this paper we give an overview of the project including the science goals and multi-wavelength coverage before presenting the first data release. We have analysed around 400 hours of e-MERLIN data allowing us to create a Data Release 1 (DR1) mosaic of ∼ 0.26 deg 2 to the full depth. These observations have been supplemented with complementary radio observations from the Karl G. Jansky Very Large Array (VLA) and optical/near infra-red observations taken with the Subaru, Canada-France-Hawaii and Spitzer Telescopes. The main data product is a catalogue of 887 sources detected by the VLA, of which 395 are detected by e-MERLIN and 197 of these are resolved. We have investigated the size, flux and spectral index properties of these sources finding them compatible with previous studies. Preliminary photometric redshifts, and an assessment of galaxy shapes measured in the radio data, combined with a radio-optical cross-correlation technique probing cosmic shear in a supercluster environment, are presented in companion papers.

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The Tiered Radio Extragalactic Continuum Simulation (T-RECS)

Cited by 120 publications

References 220 publications

Cosmic evolution of star-forming galaxies to z ≃ 1.8 in the faint low-frequency radio source population

Cosmic evolution of star-forming galaxies to z ≃ 1.8 in the faint low-frequency radio source population

SuperCLASS – III. Weak lensing from radio and optical observations in Data Release 1

SuperCLASS – I. The super cluster assisted shear survey: Project overview and data release 1

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