STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/214394 |
Resumo: | We present a blind time-delay cosmographic analysis for the lens system DES J0408−5354. This system is extraordinary for the presence of two sets of multiple images at different redshifts, which provide the opportunity to obtain more information at the cost of increased modelling complexity with respect to previously analysed systems. We perform detailed modelling of the mass distribution for this lens system using three band Hubble Space Telescope imaging. We combine the measured time delays, line-of-sight central velocity dispersion of the deflector, and statistically constrained external convergence with our lens models to estimate two cosmological distances. We measure the ‘effective’ time-delay distance corresponding to the redshifts of the deflector and the lensed quasar DeffΔt=3382+146−115 Mpc and the angular diameter distance to the deflector Dd = 1711+376−280 Mpc, with covariance between the two distances. From these constraints on the cosmological distances, we infer the Hubble constant H0= 74.2+2.7−3.0 km s−1 Mpc−1 assuming a flat ΛCDM cosmology and a uniform prior for Ωm as Ωm∼U(0.05,0.5). This measurement gives the most precise constraint on H0 to date from a single lens. Our measurement is consistent with that obtained from the previous sample of six lenses analysed by the H0 Lenses in COSMOGRAIL’s Wellspring (H0LiCOW) collaboration. It is also consistent with measurements of H0 based on the local distance ladder, reinforcing the tension with the inference from early Universe probes, for example, with 2.2σ discrepancy from the cosmic microwave background measurement. |
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Shajib, Anowar J.Santiago, Basilio XavierZhang, Yuanyuan2020-10-23T04:10:15Z20200035-8711http://hdl.handle.net/10183/214394001115807We present a blind time-delay cosmographic analysis for the lens system DES J0408−5354. This system is extraordinary for the presence of two sets of multiple images at different redshifts, which provide the opportunity to obtain more information at the cost of increased modelling complexity with respect to previously analysed systems. We perform detailed modelling of the mass distribution for this lens system using three band Hubble Space Telescope imaging. We combine the measured time delays, line-of-sight central velocity dispersion of the deflector, and statistically constrained external convergence with our lens models to estimate two cosmological distances. We measure the ‘effective’ time-delay distance corresponding to the redshifts of the deflector and the lensed quasar DeffΔt=3382+146−115 Mpc and the angular diameter distance to the deflector Dd = 1711+376−280 Mpc, with covariance between the two distances. From these constraints on the cosmological distances, we infer the Hubble constant H0= 74.2+2.7−3.0 km s−1 Mpc−1 assuming a flat ΛCDM cosmology and a uniform prior for Ωm as Ωm∼U(0.05,0.5). This measurement gives the most precise constraint on H0 to date from a single lens. Our measurement is consistent with that obtained from the previous sample of six lenses analysed by the H0 Lenses in COSMOGRAIL’s Wellspring (H0LiCOW) collaboration. It is also consistent with measurements of H0 based on the local distance ladder, reinforcing the tension with the inference from early Universe probes, for example, with 2.2σ discrepancy from the cosmic microwave background measurement.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 494, no. 4 (June 2020), p. 6072-6102CosmologiaConstante de HubbleLentes gravitacionaisDeslocamento para o vermelhoGavitational lensing: strongCosmological parametersDistance scaleCosmology: observationsSTRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354Estrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001115807.pdf.txt001115807.pdf.txtExtracted Texttext/plain162236http://www.lume.ufrgs.br/bitstream/10183/214394/2/001115807.pdf.txt4ba6bb1ac95725036e1394bc3aa25288MD52ORIGINAL001115807.pdfTexto completo (inglês)application/pdf5394372http://www.lume.ufrgs.br/bitstream/10183/214394/1/001115807.pdf5018bc24c5d4d62603c4007ed14f5fe0MD5110183/2143942023-07-02 03:42:57.735032oai:www.lume.ufrgs.br:10183/214394Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-02T06:42:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
title |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
spellingShingle |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 Shajib, Anowar J. Cosmologia Constante de Hubble Lentes gravitacionais Deslocamento para o vermelho Gavitational lensing: strong Cosmological parameters Distance scale Cosmology: observations |
title_short |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
title_full |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
title_fullStr |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
title_full_unstemmed |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
title_sort |
STRIDES : a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354 |
author |
Shajib, Anowar J. |
author_facet |
Shajib, Anowar J. Santiago, Basilio Xavier Zhang, Yuanyuan |
author_role |
author |
author2 |
Santiago, Basilio Xavier Zhang, Yuanyuan |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Shajib, Anowar J. Santiago, Basilio Xavier Zhang, Yuanyuan |
dc.subject.por.fl_str_mv |
Cosmologia Constante de Hubble Lentes gravitacionais Deslocamento para o vermelho |
topic |
Cosmologia Constante de Hubble Lentes gravitacionais Deslocamento para o vermelho Gavitational lensing: strong Cosmological parameters Distance scale Cosmology: observations |
dc.subject.eng.fl_str_mv |
Gavitational lensing: strong Cosmological parameters Distance scale Cosmology: observations |
description |
We present a blind time-delay cosmographic analysis for the lens system DES J0408−5354. This system is extraordinary for the presence of two sets of multiple images at different redshifts, which provide the opportunity to obtain more information at the cost of increased modelling complexity with respect to previously analysed systems. We perform detailed modelling of the mass distribution for this lens system using three band Hubble Space Telescope imaging. We combine the measured time delays, line-of-sight central velocity dispersion of the deflector, and statistically constrained external convergence with our lens models to estimate two cosmological distances. We measure the ‘effective’ time-delay distance corresponding to the redshifts of the deflector and the lensed quasar DeffΔt=3382+146−115 Mpc and the angular diameter distance to the deflector Dd = 1711+376−280 Mpc, with covariance between the two distances. From these constraints on the cosmological distances, we infer the Hubble constant H0= 74.2+2.7−3.0 km s−1 Mpc−1 assuming a flat ΛCDM cosmology and a uniform prior for Ωm as Ωm∼U(0.05,0.5). This measurement gives the most precise constraint on H0 to date from a single lens. Our measurement is consistent with that obtained from the previous sample of six lenses analysed by the H0 Lenses in COSMOGRAIL’s Wellspring (H0LiCOW) collaboration. It is also consistent with measurements of H0 based on the local distance ladder, reinforcing the tension with the inference from early Universe probes, for example, with 2.2σ discrepancy from the cosmic microwave background measurement. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-10-23T04:10:15Z |
dc.date.issued.fl_str_mv |
2020 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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001115807 |
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http://hdl.handle.net/10183/214394 |
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eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 494, no. 4 (June 2020), p. 6072-6102 |
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openAccess |
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