{"id":"https://openalex.org/W3105578751","doi":null,"title":"Primordial Helium Abundance: A Reanalysis of the Izotov-Thuan Spectroscopic Sample","display_name":"Primordial Helium Abundance: A Reanalysis of the Izotov-Thuan Spectroscopic Sample","publication_year":2006,"publication_date":"2006-01-01","ids":{"openalex":"https://openalex.org/W3105578751","mag":"3105578751"},"language":"en","primary_location":{"id":"pmh:oai:CiteSeerX.psu:10.1.1.256.2156","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.2156","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://arxiv.org/pdf/astro-ph/0603334v1.pdf","raw_type":"text"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5111623240","display_name":"M. Fukugita","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I40036882","display_name":"Institute for Advanced Study","ror":"https://ror.org/00f809463","country_code":"US","type":"facility","lineage":["https://openalex.org/I40036882"]},{"id":"https://openalex.org/I4387155299","display_name":"Institute for Cosmic Ray Research","ror":"https://ror.org/008td3p62","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4387155299","https://openalex.org/I74801974"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP","US"],"is_corresponding":false,"raw_author_name":"Masataka Fukugita (a","raw_affiliation_strings":["Institute for Advanced Study, School of Natural Sciences, Einstein Drive, Princeton, NJ 08540","Institute for Cosmic Ray Research, University of Tokyo, 277-8582, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Advanced Study, School of Natural Sciences, Einstein Drive, Princeton, NJ 08540","institution_ids":["https://openalex.org/I40036882"]},{"raw_affiliation_string":"Institute for Cosmic Ray Research, University of Tokyo, 277-8582, Japan","institution_ids":["https://openalex.org/I4387155299","https://openalex.org/I74801974"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5102780081","display_name":"Masahiro Kawasaki","orcid":"https://orcid.org/0000-0001-9991-7051","observed_orcids":["https://orcid.org/0000-0001-9991-7051"]},"institutions":[{"id":"https://openalex.org/I4387155299","display_name":"Institute for Cosmic Ray Research","ror":"https://ror.org/008td3p62","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4387155299","https://openalex.org/I74801974"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Masahiro Kawasaki (a","raw_affiliation_strings":["Institute for Cosmic Ray Research, University of Tokyo, 277-8582, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Cosmic Ray Research, University of Tokyo, 277-8582, Japan","institution_ids":["https://openalex.org/I4387155299","https://openalex.org/I74801974"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":58,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.4399000108242035,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.4399000108242035,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.3167000114917755,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10095","display_name":"Cosmology and Gravitation Theories","score":0.10289999842643738,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/primordial-helium-abundance","display_name":"primordial helium abundance","score":1.0},{"id":"https://openalex.org/keywords/extragalactic-h-ii-regions","display_name":"extragalactic H II regions","score":0.9750000238418579},{"id":"https://openalex.org/keywords/metal-poor-galaxies","display_name":"metal-poor galaxies","score":0.7749999761581421},{"id":"https://openalex.org/keywords/reanalysis","display_name":"reanalysis","score":0.5009999871253967}],"concepts":[{"id":"https://openalex.org/C546029482","wikidata":"https://www.wikidata.org/wiki/Q560","display_name":"Helium","level":2,"score":0.7493095397949219},{"id":"https://openalex.org/C99465377","wikidata":"https://www.wikidata.org/wiki/Q217030","display_name":"Metallicity","level":3,"score":0.7490452527999878},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.6402827501296997},{"id":"https://openalex.org/C132459708","wikidata":"https://www.wikidata.org/wiki/Q744069","display_name":"Extrapolation","level":2,"score":0.5783832669258118},{"id":"https://openalex.org/C77077793","wikidata":"https://www.wikidata.org/wiki/Q336019","display_name":"Abundance (ecology)","level":2,"score":0.5758992433547974},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.5606477856636047},{"id":"https://openalex.org/C20443986","wikidata":"https://www.wikidata.org/wiki/Q466960","display_name":"Isotopes of helium","level":3,"score":0.45124363899230957},{"id":"https://openalex.org/C113196181","wikidata":"https://www.wikidata.org/wiki/Q485223","display_name":"Analytical Chemistry (journal)","level":2,"score":0.3752111494541168},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.2930295467376709},{"id":"https://openalex.org/C184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","level":1,"score":0.2340209186077118},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.20652514696121216},{"id":"https://openalex.org/C98444146","wikidata":"https://www.wikidata.org/wiki/Q318","display_name":"Galaxy","level":2,"score":0.12822139263153076},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.11129087209701538},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.07083866000175476},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.061631232500076294},{"id":"https://openalex.org/C505870484","wikidata":"https://www.wikidata.org/wiki/Q180538","display_name":"Fishery","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"pmh:oai:CiteSeerX.psu:10.1.1.256.2156","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.2156","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://arxiv.org/pdf/astro-ph/0603334v1.pdf","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.256.7430","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.7430","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://arxiv.org/pdf/astro-ph/0603334v3.pdf","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.257.1949","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.1949","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://arxiv.org/pdf/astro-ph/0603334v2.pdf","raw_type":"text"},{"id":"pmh:oai:cds.cern.ch:934559","doi":null,"is_oa":false,"landing_page_url":"http://cds.cern.ch/record/934559","pdf_url":null,"source":{"id":"https://openalex.org/S4306402195","display_name":"CERN Document Server (European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":20,"referenced_works":["https://openalex.org/W1513591705","https://openalex.org/W1972117042","https://openalex.org/W1978029503","https://openalex.org/W1995519722","https://openalex.org/W1998205067","https://openalex.org/W2002793071","https://openalex.org/W2005276762","https://openalex.org/W2013895183","https://openalex.org/W2044115585","https://openalex.org/W2045424819","https://openalex.org/W2063869643","https://openalex.org/W2065390672","https://openalex.org/W2072339552","https://openalex.org/W2076378519","https://openalex.org/W2081071151","https://openalex.org/W2081087406","https://openalex.org/W2118265220","https://openalex.org/W2121134683","https://openalex.org/W2145569606","https://openalex.org/W2166733904"],"related_works":["https://openalex.org/W2063869643","https://openalex.org/W1667384682","https://openalex.org/W2784118487","https://openalex.org/W1659462895","https://openalex.org/W1946283183","https://openalex.org/W3092105698","https://openalex.org/W2036141207","https://openalex.org/W1641646100","https://openalex.org/W2102612087","https://openalex.org/W2905604397"],"abstract_inverted_index":{"A":[0],"reanalysis":[1],"is":[2,35],"made":[3],"for":[4,9,38,89],"the":[5,10,23,30,44,52,57,79,82,93,98],"helium":[6,47,95],"abundance":[7,48,96],"determination":[8],"Izotov-Thuan":[11],"(2004)":[12],"spectroscopic":[13],"sample":[14],"of":[15,25,29,59,81,85,92,100],"extragalactic":[16],"H":[17],"II":[18],"regions.":[19],"We":[20],"find":[21],"that":[22],"effect":[24],"underlying":[26,86],"stellar":[27,87],"absorption":[28,88],"He":[31],"I":[32],"lines,":[33],"which":[34],"more":[36],"important":[37],"metal":[39],"poor":[40],"systems,":[41],"affects":[42],"significantly":[43],"inferred":[45],"primordial":[46,94],"Yp":[49,65],"obtained":[50],"in":[51],"zero":[53],"metallicity":[54],"limit":[55],"and":[56,70],"slope":[58],"linear":[60],"extrapolation,":[61],"dY/dZ.":[62],"This":[63],"brings":[64],"from":[66],"0.234\u00b10.004":[67],"to":[68,74,97],"0.250\u00b10.004":[69],"dY/dZ":[71],"=":[72],"4.7\u00b11.0":[73],"1.1\u00b11.4.":[75],"Conservatively,":[76],"this":[77],"indicates":[78],"importance":[80],"proper":[83],"understanding":[84],"accurate":[90],"determinations":[91],"error":[99],"\u03b4Yp":[101],"\u2243":[102],"0.002":[103],"\u2212":[104],"0.004.":[105],"1.":[106]},"counts_by_year":[{"year":2020,"cited_by_count":3},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":3},{"year":2012,"cited_by_count":1}],"updated_date":"2026-11-03T10:50:19.383937","created_date":"2020-11-23T00:00:00"}
