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dc.contributor.authorAbbott, Timothy M. C.pt_BR
dc.contributor.authorSantiago, Basilio Xavierpt_BR
dc.contributor.authorDES Collaborationpt_BR
dc.date.accessioned2019-06-18T02:34:30Zpt_BR
dc.date.issued2019pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/195850pt_BR
dc.description.abstractWe present angular diameter distance measurements obtained by locating the baryon acoustic oscillations (BAO) scale in the distribution of galaxies selected from the first year of Dark Energy Survey data. We consider a sample of over 1.3 million galaxies distributed over a footprint of 1336 deg2 with 0.6 < zphoto < 1 and a typical redshift uncertainty of 0.03(1 + z). This sample was selected, as fully described in a companion paper, using a colour/magnitude selection that optimizes trade-offs between number density and redshift uncertainty.We investigate the BAO signal in the projected clustering using three conventions, the angular separation, the comoving transverse separation, and spherical harmonics. Further, we compare results obtained from template-based and machine-learning photometric redshift determinations. We use 1800 simulations that approximate our sample in order to produce covariance matrices and allow us to validate our distance scale measurement methodology. We measure the angular diameter distance, DA, at the effective redshift of our sample divided by the true physical scale of the BAO feature, rd. We obtain close to a 4 per cent distance measurement of DA(zeff = 0.81)/rd = 10.75 ± 0.43. These results are consistent with the flat cold dark matter concordance cosmological model supported by numerous other recent experimental results.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 483, no. 4 (Mar. 2019), p. 4866-4883pt_BR
dc.rightsOpen Accessen
dc.subjectCosmology: observationsen
dc.subjectDeslocamento para o vermelhopt_BR
dc.subjectLarge-scale structure of universeen
dc.subjectCatalogos astronomicospt_BR
dc.subjectFotometria astronômicapt_BR
dc.titleDark Energy Survey Year 1 results : measurement of the baryon acoustic oscillation scale in the distribution of galaxies to redshift 1pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001094494pt_BR
dc.type.originEstrangeiropt_BR


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