Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14
We measure the imprint of primordial baryon acoustic oscillations (BAOs) in the correlation function of Lyα absorption in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) and the extended BOSS (eBOSS) in Data Release 14 (DR14) of the Sloan Digital Sky Survey (SDSS)-IV. In addit...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2019-09, Vol.629, p.A85 |
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| creator | de Sainte Agathe, Victoria Balland, Christophe du Mas des Bourboux, Hélion Busca, Nicolás G. Blomqvist, Michael Guy, Julien Rich, James Font-Ribera, Andreu Pieri, Matthew M. Bautista, Julian E. Dawson, Kyle Le Goff, Jean-Marc de la Macorra, Axel Palanque-Delabrouille, Nathalie Percival, Will J. Pérez-Ràfols, Ignasi Schneider, Donald P. Slosar, Anže Yèche, Christophe |
| description | We measure the imprint of primordial baryon acoustic oscillations (BAOs) in the correlation function of Lyα absorption in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) and the extended BOSS (eBOSS) in Data Release 14 (DR14) of the Sloan Digital Sky Survey (SDSS)-IV. In addition to 179 965 spectra with absorption in the Lyman-α (Lyα) region, we use Lyα absorption in the Lyman-β region of 56 154 spectra for the first time. We measure the Hubble distance, DH, and the comoving angular diameter distance, DM, relative to the sound horizon at the drag epoch rd at an effective redshift z = 2.34. Using a physical model of the correlation function outside the BAO peak, we find DH(2.34)/rd = 8.86 ± 0.29 and DM(2.34)/rd = 37.41 ± 1.86, within 1σ from the flat-ΛCDM model consistent with CMB anisotropy measurements. With the addition of polynomial “broadband” terms, the results remain within one standard deviation of the CMB-inspired model. Combined with the quasar-Lyα cross-correlation measurement presented in a companion paper, the BAO measurements at z = 2.35 are within 1.7σ of the predictions of this model. |
| doi_str_mv | 10.1051/0004-6361/201935638 |
| format | Article |
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In addition to 179 965 spectra with absorption in the Lyman-α (Lyα) region, we use Lyα absorption in the Lyman-β region of 56 154 spectra for the first time. We measure the Hubble distance, DH, and the comoving angular diameter distance, DM, relative to the sound horizon at the drag epoch rd at an effective redshift z = 2.34. Using a physical model of the correlation function outside the BAO peak, we find DH(2.34)/rd = 8.86 ± 0.29 and DM(2.34)/rd = 37.41 ± 1.86, within 1σ from the flat-ΛCDM model consistent with CMB anisotropy measurements. With the addition of polynomial “broadband” terms, the results remain within one standard deviation of the CMB-inspired model. Combined with the quasar-Lyα cross-correlation measurement presented in a companion paper, the BAO measurements at z = 2.35 are within 1.7σ of the predictions of this model.</description><identifier>ISSN: 0004-6361</identifier><identifier>EISSN: 1432-0746</identifier><identifier>EISSN: 1432-0756</identifier><identifier>DOI: 10.1051/0004-6361/201935638</identifier><language>eng</language><publisher>Heidelberg: EDP Sciences</publisher><subject>Absorption ; Anisotropy ; ASTRONOMY AND ASTROPHYSICS ; Astrophysics ; Baryons ; Broadband ; Correlation analysis ; cosmological parameters ; cosmology ; cosmology: observations ; dark energy ; Diameters ; observations ; Oscillations ; Physics ; Polynomials ; Quasars ; Red shift ; Sky surveys (astronomy) ; Spectra</subject><ispartof>Astronomy and astrophysics (Berlin), 2019-09, Vol.629, p.A85</ispartof><rights>2019. This work is licensed under http://creativecommons.org/licenses/by/4.0 (the “License”). 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In addition to 179 965 spectra with absorption in the Lyman-α (Lyα) region, we use Lyα absorption in the Lyman-β region of 56 154 spectra for the first time. We measure the Hubble distance, DH, and the comoving angular diameter distance, DM, relative to the sound horizon at the drag epoch rd at an effective redshift z = 2.34. Using a physical model of the correlation function outside the BAO peak, we find DH(2.34)/rd = 8.86 ± 0.29 and DM(2.34)/rd = 37.41 ± 1.86, within 1σ from the flat-ΛCDM model consistent with CMB anisotropy measurements. With the addition of polynomial “broadband” terms, the results remain within one standard deviation of the CMB-inspired model. Combined with the quasar-Lyα cross-correlation measurement presented in a companion paper, the BAO measurements at z = 2.35 are within 1.7σ of the predictions of this model.</description><subject>Absorption</subject><subject>Anisotropy</subject><subject>ASTRONOMY AND ASTROPHYSICS</subject><subject>Astrophysics</subject><subject>Baryons</subject><subject>Broadband</subject><subject>Correlation analysis</subject><subject>cosmological parameters</subject><subject>cosmology</subject><subject>cosmology: observations</subject><subject>dark energy</subject><subject>Diameters</subject><subject>observations</subject><subject>Oscillations</subject><subject>Physics</subject><subject>Polynomials</subject><subject>Quasars</subject><subject>Red shift</subject><subject>Sky surveys (astronomy)</subject><subject>Spectra</subject><issn>0004-6361</issn><issn>1432-0746</issn><issn>1432-0756</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNo9kc9u1DAQhy0EEkvhCbhYcOKQdvwndnLg0N1Ci7SiUlvEceTMOtqUbbzYXkR5K16EZ8JRYE8jj77fWN8MY68FnAqoxRkA6MooI84kiFbVRjVP2EJoJSuw2jxliyPxnL1I6b48pWjUguHSxccwckfhkPJAPCQadjuXhzAm7jL_xd9zeao072N44HnrOYUY_X8i9Hz9-Oc3d10KcT_1-DByv7y-veUXN0K_ZM96t0v-1b96wr58_HC3uqrW15efVufrirQUuXKtI-mJenDWSoLOdqbb-FaR0dT1pqW-9Z2soe_AU2esBeHlRoC1RWpj1Ql7M88NxQKLQ_a0pTCOnjKK2oKp2wK9m6Gt2-E-Dg_FHYMb8Op8jeQdgpSNslr9EIV9O7P7GL4ffMp4Hw5xLA4odWPqWjRy-lbNFMWQUvT9cawAnE6D0-JxWjweT1NS1ZwaUvY_jxEXv6GxytbYwFdcXn5uzZ1Y4Y36C0AJjd0</recordid><startdate>20190901</startdate><enddate>20190901</enddate><creator>de Sainte Agathe, Victoria</creator><creator>Balland, Christophe</creator><creator>du Mas des Bourboux, Hélion</creator><creator>Busca, Nicolás G.</creator><creator>Blomqvist, Michael</creator><creator>Guy, Julien</creator><creator>Rich, James</creator><creator>Font-Ribera, Andreu</creator><creator>Pieri, Matthew M.</creator><creator>Bautista, Julian E.</creator><creator>Dawson, Kyle</creator><creator>Le Goff, Jean-Marc</creator><creator>de la Macorra, Axel</creator><creator>Palanque-Delabrouille, Nathalie</creator><creator>Percival, Will J.</creator><creator>Pérez-Ràfols, Ignasi</creator><creator>Schneider, Donald P.</creator><creator>Slosar, Anže</creator><creator>Yèche, Christophe</creator><general>EDP Sciences</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><scope>OIOZB</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-9885-3989</orcidid></search><sort><creationdate>20190901</creationdate><title>Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14</title><author>de Sainte Agathe, Victoria ; Balland, Christophe ; du Mas des Bourboux, Hélion ; Busca, Nicolás G. ; Blomqvist, Michael ; Guy, Julien ; Rich, James ; Font-Ribera, Andreu ; Pieri, Matthew M. ; Bautista, Julian E. ; Dawson, Kyle ; Le Goff, Jean-Marc ; de la Macorra, Axel ; Palanque-Delabrouille, Nathalie ; Percival, Will J. ; Pérez-Ràfols, Ignasi ; Schneider, Donald P. ; Slosar, Anže ; Yèche, Christophe</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c421t-a9ac2eccf0a772c0b7b6bde93c64cbf69cf9eb250fb0ecb67701e2d1077636d73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Absorption</topic><topic>Anisotropy</topic><topic>ASTRONOMY AND ASTROPHYSICS</topic><topic>Astrophysics</topic><topic>Baryons</topic><topic>Broadband</topic><topic>Correlation analysis</topic><topic>cosmological parameters</topic><topic>cosmology</topic><topic>cosmology: observations</topic><topic>dark energy</topic><topic>Diameters</topic><topic>observations</topic><topic>Oscillations</topic><topic>Physics</topic><topic>Polynomials</topic><topic>Quasars</topic><topic>Red shift</topic><topic>Sky surveys (astronomy)</topic><topic>Spectra</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>de Sainte Agathe, Victoria</creatorcontrib><creatorcontrib>Balland, Christophe</creatorcontrib><creatorcontrib>du Mas des Bourboux, Hélion</creatorcontrib><creatorcontrib>Busca, Nicolás G.</creatorcontrib><creatorcontrib>Blomqvist, Michael</creatorcontrib><creatorcontrib>Guy, Julien</creatorcontrib><creatorcontrib>Rich, James</creatorcontrib><creatorcontrib>Font-Ribera, Andreu</creatorcontrib><creatorcontrib>Pieri, Matthew M.</creatorcontrib><creatorcontrib>Bautista, Julian E.</creatorcontrib><creatorcontrib>Dawson, Kyle</creatorcontrib><creatorcontrib>Le Goff, Jean-Marc</creatorcontrib><creatorcontrib>de la Macorra, Axel</creatorcontrib><creatorcontrib>Palanque-Delabrouille, Nathalie</creatorcontrib><creatorcontrib>Percival, Will J.</creatorcontrib><creatorcontrib>Pérez-Ràfols, Ignasi</creatorcontrib><creatorcontrib>Schneider, Donald P.</creatorcontrib><creatorcontrib>Slosar, Anže</creatorcontrib><creatorcontrib>Yèche, Christophe</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL), Upton, NY (United States)</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>de Sainte Agathe, Victoria</au><au>Balland, Christophe</au><au>du Mas des Bourboux, Hélion</au><au>Busca, Nicolás G.</au><au>Blomqvist, Michael</au><au>Guy, Julien</au><au>Rich, James</au><au>Font-Ribera, Andreu</au><au>Pieri, Matthew M.</au><au>Bautista, Julian E.</au><au>Dawson, Kyle</au><au>Le Goff, Jean-Marc</au><au>de la Macorra, Axel</au><au>Palanque-Delabrouille, Nathalie</au><au>Percival, Will J.</au><au>Pérez-Ràfols, Ignasi</au><au>Schneider, Donald P.</au><au>Slosar, Anže</au><au>Yèche, Christophe</au><aucorp>Brookhaven National Laboratory (BNL), Upton, NY (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>2019-09-01</date><risdate>2019</risdate><volume>629</volume><spage>A85</spage><pages>A85-</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><eissn>1432-0756</eissn><abstract>We measure the imprint of primordial baryon acoustic oscillations (BAOs) in the correlation function of Lyα absorption in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) and the extended BOSS (eBOSS) in Data Release 14 (DR14) of the Sloan Digital Sky Survey (SDSS)-IV. In addition to 179 965 spectra with absorption in the Lyman-α (Lyα) region, we use Lyα absorption in the Lyman-β region of 56 154 spectra for the first time. We measure the Hubble distance, DH, and the comoving angular diameter distance, DM, relative to the sound horizon at the drag epoch rd at an effective redshift z = 2.34. Using a physical model of the correlation function outside the BAO peak, we find DH(2.34)/rd = 8.86 ± 0.29 and DM(2.34)/rd = 37.41 ± 1.86, within 1σ from the flat-ΛCDM model consistent with CMB anisotropy measurements. With the addition of polynomial “broadband” terms, the results remain within one standard deviation of the CMB-inspired model. Combined with the quasar-Lyα cross-correlation measurement presented in a companion paper, the BAO measurements at z = 2.35 are within 1.7σ of the predictions of this model.</abstract><cop>Heidelberg</cop><pub>EDP Sciences</pub><doi>10.1051/0004-6361/201935638</doi><orcidid>https://orcid.org/0000-0002-9885-3989</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; EDP Sciences |
| subjects | Absorption Anisotropy ASTRONOMY AND ASTROPHYSICS Astrophysics Baryons Broadband Correlation analysis cosmological parameters cosmology cosmology: observations dark energy Diameters observations Oscillations Physics Polynomials Quasars Red shift Sky surveys (astronomy) Spectra |
| title | Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14 |
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