High-precision Nuclear Chronometer for the Cosmos
Nuclear chronometers, which predict the ages of the oldest stars by comparing the present and initial abundances of long-lived radioactive nuclides, provide an independent dating technique for the cosmos. The idea of synchronizing Th/X, U/X, and Th/U chronometers can impose stringent constraints on...
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| Veröffentlicht in: | The Astrophysical journal 2022-12, Vol.941 (2), p.152 |
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| creator | Wu, X. H. Zhao, P. W. Zhang, S. Q. Meng, J. |
| description | Nuclear chronometers, which predict the ages of the oldest stars by comparing the present and initial abundances of long-lived radioactive nuclides, provide an independent dating technique for the cosmos. The idea of synchronizing Th/X, U/X, and Th/U chronometers can impose stringent constraints on the astrophysical conditions in the
r
-process simulations, giving rise to the Th-U-X chronometer. It is found that the astrophysical uncertainties of nuclear cosmochronology are significantly reduced from more than ±2 billion years to about 0.3 billion years. The Th-U-X chronometer is then applied to estimate the ages of the six metal-poor stars with observed uranium abundances, and the predicted ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation but contradict the cosmic age of 11.4 billion years from the gravitational lens measurement. |
| doi_str_mv | 10.3847/1538-4357/aca526 |
| format | Article |
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r
-process simulations, giving rise to the Th-U-X chronometer. It is found that the astrophysical uncertainties of nuclear cosmochronology are significantly reduced from more than ±2 billion years to about 0.3 billion years. The Th-U-X chronometer is then applied to estimate the ages of the six metal-poor stars with observed uranium abundances, and the predicted ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation but contradict the cosmic age of 11.4 billion years from the gravitational lens measurement.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/aca526</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Background radiation ; Chronometers ; Cosmic microwave background ; Cosmochronology ; Cosmos ; Dating techniques ; Gravitational lenses ; Measuring instruments ; Metallicity ; Nuclear astrophysics ; Nucleosynthesis ; Nuclides ; R-process ; Radiation ; Radioisotopes ; Radiometric dating ; Stellar ages ; Synchronism ; Thorium ; Uranium</subject><ispartof>The Astrophysical journal, 2022-12, Vol.941 (2), p.152</ispartof><rights>2022. The Author(s). Published by the American Astronomical Society.</rights><rights>2022. The Author(s). Published by the American Astronomical Society. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-85ba444e96e111407bd37b5d1c51aa65eca6241f807baf395ec5aeaf13c155013</citedby><cites>FETCH-LOGICAL-c380t-85ba444e96e111407bd37b5d1c51aa65eca6241f807baf395ec5aeaf13c155013</cites><orcidid>0000-0003-0237-5853 ; 0000-0002-0977-5318</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aca526/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,778,782,862,27907,27908,38873,53850</link.rule.ids></links><search><creatorcontrib>Wu, X. H.</creatorcontrib><creatorcontrib>Zhao, P. W.</creatorcontrib><creatorcontrib>Zhang, S. Q.</creatorcontrib><creatorcontrib>Meng, J.</creatorcontrib><title>High-precision Nuclear Chronometer for the Cosmos</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>Nuclear chronometers, which predict the ages of the oldest stars by comparing the present and initial abundances of long-lived radioactive nuclides, provide an independent dating technique for the cosmos. The idea of synchronizing Th/X, U/X, and Th/U chronometers can impose stringent constraints on the astrophysical conditions in the
r
-process simulations, giving rise to the Th-U-X chronometer. It is found that the astrophysical uncertainties of nuclear cosmochronology are significantly reduced from more than ±2 billion years to about 0.3 billion years. The Th-U-X chronometer is then applied to estimate the ages of the six metal-poor stars with observed uranium abundances, and the predicted ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation but contradict the cosmic age of 11.4 billion years from the gravitational lens measurement.</description><subject>Astrophysics</subject><subject>Background radiation</subject><subject>Chronometers</subject><subject>Cosmic microwave background</subject><subject>Cosmochronology</subject><subject>Cosmos</subject><subject>Dating techniques</subject><subject>Gravitational lenses</subject><subject>Measuring instruments</subject><subject>Metallicity</subject><subject>Nuclear astrophysics</subject><subject>Nucleosynthesis</subject><subject>Nuclides</subject><subject>R-process</subject><subject>Radiation</subject><subject>Radioisotopes</subject><subject>Radiometric dating</subject><subject>Stellar ages</subject><subject>Synchronism</subject><subject>Thorium</subject><subject>Uranium</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><recordid>eNp9kEFLxDAQhYMouK7ePRbEm3EzTdK0RymuKyx6UfAWptnE7bJtatI9-O9tqehFPA3z5r038BFyCeyW50ItQPKcCi7VAg3KNDsisx_pmMwYY4JmXL2dkrMYd-OaFsWMwKp-39IuWFPH2rfJ08HsLYak3Abf-sb2NiTOh6Tf2qT0sfHxnJw43Ed78T3n5HV5_1Ku6Pr54bG8W1PDc9bTXFYohLBFZgFAMFVtuKrkBowExExag1kqwOXDBR0vBkGiRQfcgJQM-JxcTb1d8B8HG3u984fQDi91qmQGBZdCDS42uUzwMQbrdBfqBsOnBqZHMHqkoEcKegIzRG6mSO27385_7Nd_2LHb6UKATodAqruN419Xg2-_</recordid><startdate>20221201</startdate><enddate>20221201</enddate><creator>Wu, X. 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H.</creatorcontrib><creatorcontrib>Zhao, P. W.</creatorcontrib><creatorcontrib>Zhang, S. Q.</creatorcontrib><creatorcontrib>Meng, J.</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, X. H.</au><au>Zhao, P. W.</au><au>Zhang, S. Q.</au><au>Meng, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High-precision Nuclear Chronometer for the Cosmos</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2022-12-01</date><risdate>2022</risdate><volume>941</volume><issue>2</issue><spage>152</spage><pages>152-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>Nuclear chronometers, which predict the ages of the oldest stars by comparing the present and initial abundances of long-lived radioactive nuclides, provide an independent dating technique for the cosmos. The idea of synchronizing Th/X, U/X, and Th/U chronometers can impose stringent constraints on the astrophysical conditions in the
r
-process simulations, giving rise to the Th-U-X chronometer. It is found that the astrophysical uncertainties of nuclear cosmochronology are significantly reduced from more than ±2 billion years to about 0.3 billion years. The Th-U-X chronometer is then applied to estimate the ages of the six metal-poor stars with observed uranium abundances, and the predicted ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation but contradict the cosmic age of 11.4 billion years from the gravitational lens measurement.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/aca526</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-0237-5853</orcidid><orcidid>https://orcid.org/0000-0002-0977-5318</orcidid><oa>free_for_read</oa></addata></record> |
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| source | IOP Publishing Free Content; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Astrophysics Background radiation Chronometers Cosmic microwave background Cosmochronology Cosmos Dating techniques Gravitational lenses Measuring instruments Metallicity Nuclear astrophysics Nucleosynthesis Nuclides R-process Radiation Radioisotopes Radiometric dating Stellar ages Synchronism Thorium Uranium |
| title | High-precision Nuclear Chronometer for the Cosmos |
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