@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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    dct:description """
              Baryon acoustic oscillations (BAO) form a standard ruler that can be used to constrain different cosmolo- gical models. This thesis reports the first measurement of the BAO feature in the correlation function of the transmitted flux fraction in the Lyman-α forests of high redshift quasars. This detection uses 89322 quasar spectra measured by the Baryon Oscillation Spectroscopic Survey (BOSS) of the third generation of the Sloan Digital Sky Survey (SDSS-III). Redshift of used quasars belong to the range 2.1 < z < 3.5. A peak in the correlation function is seen at 1.043+0.021−0.020 times the expected BAO peak position for a concordance ΛCDM model. In addition this thesis presents a new method of quasar selection through their variability. This method is applied to the Stripe 82 region where an important number of multi-epoch photometric data is available. On this region it achieves a quasar density of 30 deg−2 to be compared with the 18 deg−2 of usual color selections.
            """ ;
    dct:identifier "tel-00936622" ;
    dct:issued "2026-05-07T06:14:29.517214"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-07T06:14:29.517219"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Détections des oscillations acoustiques de baryons grâce aux forêts Lyman-α des spectres de quasars de l'expérience BOSS" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
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    dcat:keyword "boss",
        "cosmologie",
        "energie-noire",
        "foret-lyman-alpha",
        "infoeu-reposemanticsdoctoralthesis",
        "physastrcophysics-physicsastrophysics-astro-phcosmology-and-extra-galactic-astrophysics-a",
        "quasar",
        "sdss",
        "sduastrcosciences-of-the-universe-physicsastrophysics-astro-phcosmology-and-extra-galactic",
        "theses" ;
    dcat:landingPage <https://theses.hal.science/tel-00936622> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00936622v1/resource/4109c0a4-3d35-44bd-b58b-6abed9b55f03> a dcat:Distribution ;
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    dct:issued "2026-05-07T06:14:29.522653"^^xsd:dateTime ;
    dct:modified "2026-05-07T06:14:29.505227"^^xsd:dateTime ;
    dct:title "Détections des oscillations acoustiques de baryons grâce aux forêts Lyman-α des spectres de quasars de l'expérience BOSS" ;
    dcat:accessURL <https://theses.hal.science/tel-00936622> .

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