Cosmology with AGN dust time lags–simulating the new VEILS survey

Hönig, S. F.; Watson, Derrick G.; Kishimoto, M.; Gandhi, P.; Goad, M. R.; Horne, K.; Shankar, Francesco; Banerji, M.; Boulderstone, B.; Jarvis, Matt J.; Smith, M.; Sullivan, M.

doi:10.1093/mnras/stw2484

Cited by 34 publications

(27 citation statements)

References 42 publications

(64 reference statements)

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“…In the next few years, deep, wide surveys such as VIDEO and the VISTA Extragalactic Infrared Legacy Survey (VEILS, Hönig et al 2017), which will extend the area of VIDEO, will provide improved constraints on the luminosity function and clustering of high-redshift galaxies, and allowing extension to even more luminous LBGs. By the mid 2020s it should be possible to use the Euclid space telescope mission to do this with 1,000s of LBGs (Bowler et al 2017), which will reveal how the measured large scale structure of LBGs and LAEs relates to reionization.…”

Section: Discussionmentioning

confidence: 99%

The environment and host haloes of the brightest z ∼ 6 Lyman-break galaxies

Hatfield

Bowler

Jarvis

et al. 2018

Monthly Notices of the Royal Astronomical Society

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By studying the large-scale structure of the bright high-redshift Lyman-break galaxy (LBG) population it is possible to gain an insight into the role of environment in galaxy formation physics in the early Universe. We measure the clustering of a sample of bright (−22.7 < M U V < −21.125) LBGs at z ∼ 6 and use a halo occupation distribution (HOD) model to measure their typical halo masses. We find that the clustering amplitude and corresponding HOD fits suggests that these sources are highly biased (b ∼ 8) objects in the densest regions of the high-redshift Universe. Coupled with the observed rapid evolution of the number density of these objects, our results suggest that the shape of high luminosity end of the luminosity function is related to feedback processes or dust obscuration in the early Universe -as opposed to a scenario where these sources are predominantly rare instances of the much more numerous M U V ∼ −19 population of galaxies caught in a particularly vigorous period of star formation. There is a slight tension between the number densities and clustering measurements, which we interpret this as a signal that a refinement of the model halo bias relation at high redshifts or the incorporation of quasi-linear effects may be needed for future attempts at modelling the clustering and number counts. Finally, the difference in number density between the fields (UltraVISTA has a surface density∼ 1.8 times greater than UDS) is shown to be consistent with the cosmic variance implied by the clustering measurements.

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Section: Discussionmentioning

confidence: 99%

The environment and host haloes of the brightest z ∼ 6 Lyman-break galaxies

Hatfield

Bowler

Jarvis

et al. 2018

Monthly Notices of the Royal Astronomical Society

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“…Figure C1 shows the proposed final survey coverage for (left to right) E-CDFS, ELAIS-S1, and XMM-LSS. The blue rectangles show the coverage of the VIDEO (Jarvis et al 2013) or VEILS (Hönig et al 2017) infrared surveys, and are generally representative of the regions that contain the deepest ancillary data from numerous facilities. The labelled pointing centres represent the positions of the final pointing grid, with the circles showing the nominal half-power point of the MeerKAT L-band primary beam at 1284 MHz.…”

Section: Appendix C: Updated Mosaic Layoutsmentioning

confidence: 99%

MIGHTEE: total intensity radio continuum imaging and the COSMOS/XMM-LSS Early Science fields

Heywood

Jarvis

Hale

et al. 2021

Monthly Notices of the Royal Astronomical Society

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MIGHTEE is a galaxy evolution survey using simultaneous radio continuum, spectro-polarimetry, and spectral line observations from the South African MeerKAT telescope. When complete, the survey will image ∼20 deg2 over the COSMOS, E-CDFS, ELAIS-S1, and XMM-LSS extragalactic deep fields with a central frequency of 1284 MHz. These were selected based on the extensive multiwavelength datasets from numerous existing and forthcoming observational campaigns. Here we describe and validate the data processing strategy for the total intensity continuum aspect of MIGHTEE, using a single deep pointing in COSMOS (1.6 deg2) and a three-pointing mosaic in XMM-LSS (3.5 deg2). The processing includes the correction of direction-dependent effects, and results in thermal noise levels below 2 $\mathrm{\mu }$Jy beam−1 in both fields, limited in the central regions by classical confusion at ∼8″ angular resolution, and meeting the survey specifications. We also produce images at ∼5″ resolution that are ∼3 times shallower. The resulting image products form the basis of the Early Science continuum data release for MIGHTEE. From these images we extract catalogues containing 9,896 and 20,274 radio components in COSMOS and XMM-LSS respectively. We also process a close-packed mosaic of 14 additional pointings in COSMOS and use these in conjunction with the Early Science pointing to investigate methods for primary beam correction of broadband radio images, an analysis that is of relevance to all full-band MeerKAT continuum observations, and wide field interferometric imaging in general. A public release of the MIGHTEE Early Science continuum data products accompanies this article.

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“…Reverberation mapping (RM) experiments have found that the time lag in the response of the hot dust emission to variations in the optical continuum (τ ) is well enough correlated with the AGN luminosity to lead to the idea of using the hot dust reverberation in AGN as a standardisable candle which could be used to test and constrain cosmological models (e.g. Hönig 2014;Hönig et al 2017).…”

Section: Hot Dust Reverberationmentioning

confidence: 99%

Exploring the link between C iv outflow kinematics and sublimation-temperature dust in quasars

Temple

Banerji

Hewett

et al. 2020

Monthly Notices of the Royal Astronomical Society

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Using data from SDSS, UKIDSS and WISE, we investigate the properties of the high-frequency cutoff to the infrared emission in ≃5000 carefully selected luminous (Lbol ∼ 1047) type 1 quasars. The strength of ≃2 μm emission, corresponding to emission from the hottest ($T>1200\rm \, K$) dust in the sublimation zone surrounding the central continuum source, is observed to correlate with the blueshift of the C iv λ1550 emission line. We therefore find that objects with stronger signatures of nuclear outflows tend to have a larger covering fraction of sublimation-temperature dust. When controlling for the observed outflow strength, the hot dust covering fraction does not vary significantly across our sample as a function of luminosity, black hole mass or Eddington fraction. The correlation between the hot dust and the C iv line blueshifts, together with the lack of correlation between the hot dust and other parameters, therefore provides evidence of a link between the properties of the broad emission line region and the infrared-emitting dusty regions in quasars.

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Cosmology with AGN dust time lags–simulating the new VEILS survey

Cited by 34 publications

References 42 publications

The environment and host haloes of the brightest z ∼ 6 Lyman-break galaxies

The environment and host haloes of the brightest z ∼ 6 Lyman-break galaxies

MIGHTEE: total intensity radio continuum imaging and the COSMOS/XMM-LSS Early Science fields

Exploring the link between C iv outflow kinematics and sublimation-temperature dust in quasars

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