Matches in SemOpenAlex for { <https://semopenalex.org/work/W1763567330> ?p ?o ?g. }
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- W1763567330 abstract "Evidence from a large sample of quasar absorption-line spectra in damped Lyα systems has suggested a possible time variation of the fine-structure constant, α. The most statistically significant portion of this sample involves the comparison of Mg and Fe wavelength shifts using the many-multiplet (MM) method. However, the sensitivity of this method to the abundance of heavy isotopes, especially Mg, is enough to imitate an apparent variation in α in the redshift range 0.5 < z < 1.8. We implement recent yields of intermediate mass (IM) stars into a chemical evolution model and show that the ensuing isotope distribution of Mg can account for the observed variation in α provided the early initial mass function was particularly rich in IM stars or that the heavy Mg isotope yields from asymptotic giant branch stars are even higher than in present-day models. As such, these observations of quasar absorption spectra can be used to probe the nucleosynthetic history of low-metallicity damped Lyα systems in the redshift range 0.5 < z < 1.8. This analysis, in conjunction with other abundance measurements of low-metallicity systems, reinforces the mounting evidence that star formation at low metallicities may have been strongly influenced by a population of IM stars. Such IM stars have a significant influence on other abundances, particularly nitrogen. We constrain our models with independent measurements of N, Si, and Fe in damped Lyα systems as well as C/O in low-metallicity stars. In this way, we obtain consistent model parameters for this chemical evolution interpretation of the MM method results." @default.
- W1763567330 created "2016-06-24" @default.
- W1763567330 creator A5003147440 @default.
- W1763567330 creator A5014648014 @default.
- W1763567330 creator A5075475814 @default.
- W1763567330 date "2004-11-01" @default.
- W1763567330 modified "2023-09-27" @default.
- W1763567330 title "The Fine‐Structure Constant as a Probe of Chemical Evolution and Asymptotic Giant Branch Nucleosynthesis in Damped Lyα Systems" @default.
- W1763567330 cites W1484125271 @default.
- W1763567330 cites W1490438888 @default.
- W1763567330 cites W1532239545 @default.
- W1763567330 cites W1542157326 @default.
- W1763567330 cites W1543905026 @default.
- W1763567330 cites W1649066527 @default.
- W1763567330 cites W1659875532 @default.
- W1763567330 cites W1866943891 @default.
- W1763567330 cites W1969068420 @default.
- W1763567330 cites W1971330725 @default.
- W1763567330 cites W1971363306 @default.
- W1763567330 cites W1975882254 @default.
- W1763567330 cites W1978000251 @default.
- W1763567330 cites W1979743700 @default.
- W1763567330 cites W1982537326 @default.
- W1763567330 cites W1985797060 @default.
- W1763567330 cites W1991637638 @default.
- W1763567330 cites W1994108615 @default.
- W1763567330 cites W1995543542 @default.
- W1763567330 cites W1999546923 @default.
- W1763567330 cites W2001401569 @default.
- W1763567330 cites W2007315020 @default.
- W1763567330 cites W2008991502 @default.
- W1763567330 cites W2010983020 @default.
- W1763567330 cites W2012432446 @default.
- W1763567330 cites W2014958365 @default.
- W1763567330 cites W2015798867 @default.
- W1763567330 cites W2015826024 @default.
- W1763567330 cites W2016874768 @default.
- W1763567330 cites W2016943507 @default.
- W1763567330 cites W2028335785 @default.
- W1763567330 cites W2030475630 @default.
- W1763567330 cites W2033317936 @default.
- W1763567330 cites W2047798125 @default.
- W1763567330 cites W2050299602 @default.
- W1763567330 cites W2050865912 @default.
- W1763567330 cites W2061401085 @default.
- W1763567330 cites W2066948211 @default.
- W1763567330 cites W2067644575 @default.
- W1763567330 cites W2074946325 @default.
- W1763567330 cites W2076733194 @default.
- W1763567330 cites W2077218991 @default.
- W1763567330 cites W2081449502 @default.
- W1763567330 cites W2085214947 @default.
- W1763567330 cites W2085599468 @default.
- W1763567330 cites W2087070473 @default.
- W1763567330 cites W2090423081 @default.
- W1763567330 cites W2097728718 @default.
- W1763567330 cites W2103024508 @default.
- W1763567330 cites W2112338496 @default.
- W1763567330 cites W2114087841 @default.
- W1763567330 cites W2125300021 @default.
- W1763567330 cites W2126562727 @default.
- W1763567330 cites W2131689406 @default.
- W1763567330 cites W2132963358 @default.
- W1763567330 cites W2137259382 @default.
- W1763567330 cites W2139594802 @default.
- W1763567330 cites W2144518580 @default.
- W1763567330 cites W2147018234 @default.
- W1763567330 cites W2152798720 @default.
- W1763567330 cites W2153130534 @default.
- W1763567330 cites W2154307796 @default.
- W1763567330 cites W2159453713 @default.
- W1763567330 cites W2164096156 @default.
- W1763567330 cites W2164272278 @default.
- W1763567330 cites W2166972589 @default.
- W1763567330 cites W2178370839 @default.
- W1763567330 cites W2916340484 @default.
- W1763567330 cites W2995864454 @default.
- W1763567330 cites W3098107885 @default.
- W1763567330 cites W3098745829 @default.
- W1763567330 cites W3099006310 @default.
- W1763567330 cites W3099139968 @default.
- W1763567330 cites W3099280978 @default.
- W1763567330 cites W3100384601 @default.
- W1763567330 cites W3101010933 @default.
- W1763567330 cites W3101200211 @default.
- W1763567330 cites W3101341577 @default.
- W1763567330 cites W3101930143 @default.
- W1763567330 cites W3102960783 @default.
- W1763567330 cites W3103447097 @default.
- W1763567330 cites W3104612119 @default.
- W1763567330 cites W3104662633 @default.
- W1763567330 cites W3105301346 @default.
- W1763567330 cites W3105428264 @default.
- W1763567330 cites W3105596394 @default.
- W1763567330 cites W3106390598 @default.
- W1763567330 cites W3121389110 @default.
- W1763567330 cites W3123112907 @default.
- W1763567330 cites W3123999053 @default.