FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2018095859> ?p ?o ?g. }

• W2018095859 endingPage "L8" @default.
• W2018095859 startingPage "L5" @default.
• W2018095859 abstract "In an earlier paper, we pointed out the strong likelihood for universal reionization to occur twice, giving rise to a much larger Thomson optical depth due to the intergalactic medium than that in the case of a single rapid reionization at z ~ 6. The latest Wilkinson Microwave Anisotropy Probe (WMAP) observations of Kogut et al. indicate that the universe indeed appears to have entered a significantly ionized state at a very high redshift. In light of this new development, we perform a more focused analysis of the Thomson optical depth in the context of the spatially flat, cosmological constant-dominated cold dark matter model (ΛCDM) constrained by WMAP observations. While the current uncertainties of the observed Thomson optical depth are still relatively large, with τe = 0.17 ± 0.04 (68%), important implications for Population III (Pop III) star formation processes at high redshift can already be inferred. We are able to draw four conclusions: (1) In the absence of a top-heavy initial stellar mass function (IMF) for Pop III metal-free stars and without a dramatic upturn in the star formation efficiency and in the ionizing photon escape fraction at high redshift (z > 6), we find τe ≤ 0.09. (2) With a top-heavy IMF for the Pop III metal-free stars, a plausible star formation efficiency, and an ionizing photon escape fraction ≤20%, it is expected that τe ≤ 0.12, which could be raised to τe = 0.14, if the metal-enrichment efficiency of the intergalactic medium by Pop III stars is reduced by a factor of 5. (3) To reach τe = 0.15-0.17 requires at least one of the following three conditions: the cosmological model power index n is positively tilted to n ≥ 1.03, Pop III star formation in minihalos with molecular hydrogen cooling has an efficiency c*(H2, III) > 0.01, or the ionizing photon escape fraction from Pop III galaxies is close to unity. The highest τe that we have obtained is 0.24 for a WMAP-consistent ΛCDM model with n = 1.03, a Pop III star formation efficiency of 1% for minihalos, and an ionizing photon escape fraction of 100% from Pop III galaxies. (4) For the WMAP-normalized running index ΛCDM model, we obtain τe = 0.12 with a Pop III star formation efficiency of 1% for minihalos and an ionizing photon escape fraction of 100% from Pop III galaxies. If the current observed value of the Thomson optical depth withstands future data, we will have strong observational evidence that Pop III stars are massive and that their formation efficiency may be much higher than current theoretical works suggest. Alternatively, there may be unknown, nonstellar ionizing sources at very high redshift." @default.
• W2018095859 created "2016-06-24" @default.
• W2018095859 creator A5019025722 @default.
• W2018095859 date "2003-06-09" @default.
• W2018095859 modified "2023-09-25" @default.
• W2018095859 title "The Implications of <i>Wilkinson Microwave Anisotropy Probe</i> Observations for Population III Star Formation Processes" @default.
• W2018095859 cites W126859214 @default.
• W2018095859 cites W1554821233 @default.
• W2018095859 cites W1560669094 @default.
• W2018095859 cites W1651911013 @default.
• W2018095859 cites W1966943308 @default.
• W2018095859 cites W1972372405 @default.
• W2018095859 cites W1978474719 @default.
• W2018095859 cites W1978929968 @default.
• W2018095859 cites W2015295900 @default.
• W2018095859 cites W2040912209 @default.
• W2018095859 cites W204989678 @default.
• W2018095859 cites W2051816467 @default.
• W2018095859 cites W2062296686 @default.
• W2018095859 cites W2062778974 @default.
• W2018095859 cites W2067181265 @default.
• W2018095859 cites W2078240981 @default.
• W2018095859 cites W2079349557 @default.
• W2018095859 cites W2087860870 @default.
• W2018095859 cites W2150598036 @default.
• W2018095859 cites W2152043060 @default.
• W2018095859 cites W3101948972 @default.
• W2018095859 cites W3104675275 @default.
• W2018095859 cites W3105617911 @default.
• W2018095859 cites W3106192025 @default.
• W2018095859 doi "https://doi.org/10.1086/377068" @default.
• W2018095859 hasPublicationYear "2003" @default.
• W2018095859 type Work @default.
• W2018095859 sameAs 2018095859 @default.
• W2018095859 citedByCount "142" @default.
• W2018095859 countsByYear W20180958592012 @default.
• W2018095859 countsByYear W20180958592013 @default.
• W2018095859 countsByYear W20180958592014 @default.
• W2018095859 countsByYear W20180958592015 @default.
• W2018095859 countsByYear W20180958592016 @default.
• W2018095859 countsByYear W20180958592022 @default.
• W2018095859 crossrefType "journal-article" @default.
• W2018095859 hasAuthorship W2018095859A5019025722 @default.
• W2018095859 hasBestOaLocation W20180958591 @default.
• W2018095859 hasConcept C121332964 @default.
• W2018095859 hasConcept C125857072 @default.
• W2018095859 hasConcept C1276947 @default.
• W2018095859 hasConcept C144024400 @default.
• W2018095859 hasConcept C149923435 @default.
• W2018095859 hasConcept C150846664 @default.
• W2018095859 hasConcept C153294291 @default.
• W2018095859 hasConcept C189159749 @default.
• W2018095859 hasConcept C207297109 @default.
• W2018095859 hasConcept C2779345167 @default.
• W2018095859 hasConcept C27896171 @default.
• W2018095859 hasConcept C2908647359 @default.
• W2018095859 hasConcept C33024259 @default.
• W2018095859 hasConcept C44870925 @default.
• W2018095859 hasConcept C55047584 @default.
• W2018095859 hasConcept C62520636 @default.
• W2018095859 hasConcept C69672822 @default.
• W2018095859 hasConcept C85725439 @default.
• W2018095859 hasConcept C87485669 @default.
• W2018095859 hasConcept C98444146 @default.
• W2018095859 hasConceptScore W2018095859C121332964 @default.
• W2018095859 hasConceptScore W2018095859C125857072 @default.
• W2018095859 hasConceptScore W2018095859C1276947 @default.
• W2018095859 hasConceptScore W2018095859C144024400 @default.
• W2018095859 hasConceptScore W2018095859C149923435 @default.
• W2018095859 hasConceptScore W2018095859C150846664 @default.
• W2018095859 hasConceptScore W2018095859C153294291 @default.
• W2018095859 hasConceptScore W2018095859C189159749 @default.
• W2018095859 hasConceptScore W2018095859C207297109 @default.
• W2018095859 hasConceptScore W2018095859C2779345167 @default.
• W2018095859 hasConceptScore W2018095859C27896171 @default.
• W2018095859 hasConceptScore W2018095859C2908647359 @default.
• W2018095859 hasConceptScore W2018095859C33024259 @default.
• W2018095859 hasConceptScore W2018095859C44870925 @default.
• W2018095859 hasConceptScore W2018095859C55047584 @default.
• W2018095859 hasConceptScore W2018095859C62520636 @default.
• W2018095859 hasConceptScore W2018095859C69672822 @default.
• W2018095859 hasConceptScore W2018095859C85725439 @default.
• W2018095859 hasConceptScore W2018095859C87485669 @default.
• W2018095859 hasConceptScore W2018095859C98444146 @default.
• W2018095859 hasIssue "1" @default.
• W2018095859 hasLocation W20180958591 @default.
• W2018095859 hasOpenAccess W2018095859 @default.
• W2018095859 hasPrimaryLocation W20180958591 @default.
• W2018095859 hasRelatedWork W1762062943 @default.
• W2018095859 hasRelatedWork W1803904821 @default.
• W2018095859 hasRelatedWork W1961022487 @default.
• W2018095859 hasRelatedWork W2021634717 @default.
• W2018095859 hasRelatedWork W2124834154 @default.
• W2018095859 hasRelatedWork W2132030150 @default.
• W2018095859 hasRelatedWork W2611548805 @default.
• W2018095859 hasRelatedWork W3101799636 @default.
• W2018095859 hasRelatedWork W3102901269 @default.
• W2018095859 hasRelatedWork W4235457602 @default.

• next