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dc.contributor.authorHönig, S. F.
dc.contributor.authorWatson, D.
dc.contributor.authorKishimoto, M.
dc.contributor.authorGandhi, P.
dc.contributor.authorGoad, M.
dc.contributor.authorHorne, K.
dc.contributor.authorShankar, F.
dc.contributor.authorBanerji, M.
dc.contributor.authorBoulderstone, B.
dc.contributor.authorJarvis, M.
dc.contributor.authorSmith, M.
dc.contributor.authorSullivan, M.
dc.date.accessioned2016-11-18T12:30:11Z
dc.date.available2016-11-18T12:30:11Z
dc.date.issued2017-01-11
dc.identifier247732225
dc.identifier821b7623-7d84-4c4d-94f0-6b0159893121
dc.identifier85014696125
dc.identifier000393647100031
dc.identifier.citationHönig , S F , Watson , D , Kishimoto , M , Gandhi , P , Goad , M , Horne , K , Shankar , F , Banerji , M , Boulderstone , B , Jarvis , M , Smith , M & Sullivan , M 2017 , ' Cosmology with AGN dust time lags -- Simulating the new VEILS survey ' , Monthly Notices of the Royal Astronomical Society , vol. 464 , no. 2 , pp. 1693-1703 . https://doi.org/10.1093/mnras/stw2484en
dc.identifier.issn0035-8711
dc.identifier.otherArXiv: http://arxiv.org/abs/1609.09091v1
dc.identifier.urihttps://hdl.handle.net/10023/9843
dc.description.abstractThe time lag between optical and near-infrared continuum emission in active galactic nuclei (AGN) shows a tight correlation with luminosity and has been proposed as a standardizable candle for cosmology. In this paper, we explore the use of these AGN hot-dust time lags for cosmological model fitting under the constraints of the new VISTA Extragalactic Infrared Legacy Survey (VEILS). This new survey will target a 9 deg2 field observed in J and Ks band with a 14-d cadence and will run for 3 yr. The same area will be covered simultaneously in the optical griz bands by the Dark Energy Survey, providing complementary time-domain optical data. We perform realistic simulations of the survey setup, showing that we expect to recover dust time lags for about 450 objects out of a total of 1350 optical type 1 AGN, spanning a redshift range of 0.1 < z < 1.2. We use the lags recovered from our simulations to calculate precise distance moduli, establish a Hubble diagram, and fit cosmological models. Assuming realistic scatter in the distribution of the dust around the AGN as well as in the normalization of the lag–luminosity relation, we are able to constrain ΩΛ in ΛCDM with similar accuracy as current supernova samples. We discuss the benefits of combining AGN and supernovae for cosmology and connect the present work to future attempts to reach out to redshifts of z > 4.
dc.format.extent1998104
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.subjectGalaxies: activeen
dc.subjectDistance scaleen
dc.subjectInfrared: galaxiesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleCosmology with AGN dust time lags -- Simulating the new VEILS surveyen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doi10.1093/mnras/stw2484
dc.description.statusPeer revieweden
dc.identifier.grantnumberST/M001296/1en


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