FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3203802971> ?p ?o ?g. }

• W3203802971 endingPage "A96" @default.
• W3203802971 startingPage "A96" @default.
• W3203802971 abstract "Context. At present, there are strong indications that white dwarf (WD) stars with masses well below the Chandrasekhar limit ( M Ch ≈ 1.4 M ⊙ ) contribute a significant fraction of SN Ia progenitors. The relative fraction of stable iron-group elements synthesized in the explosion has been suggested as a possible discriminant between M Ch and sub- M Ch events. In particular, it is thought that the higher-density ejecta of M Ch WDs, which favours the synthesis of stable isotopes of nickel, results in prominent [Ni II ] lines in late-time spectra (≳150 d past explosion). Aims. We study the explosive nucleosynthesis of stable nickel in SNe Ia resulting from M Ch and sub- M Ch progenitors. We explore the potential for lines of [Ni II ] in the optical an near-infrared (at 7378 Å and 1.94 μm) in late-time spectra to serve as a diagnostic of the exploding WD mass. Methods. We reviewed stable Ni yields across a large variety of published SN Ia models. Using 1D M Ch delayed-detonation and sub- M Ch detonation models, we studied the synthesis of stable Ni isotopes (in particular, 58 Ni) and investigated the formation of [Ni II ] lines using non-local thermodynamic equilibrium radiative-transfer simulations with the CMFGEN code. Results. We confirm that stable Ni production is generally more efficient in M Ch explosions at solar metallicity (typically 0.02–0.08 M ⊙ for the 58 Ni isotope), but we note that the 58 Ni yield in sub- M Ch events systematically exceeds 0.01 M ⊙ for WDs that are more massive than one solar mass. We find that the radiative proton-capture reaction 57 Co( p , γ ) 58 Ni is the dominant production mode for 58 Ni in both M Ch and sub- M Ch models, while the α -capture reaction on 54 Fe has a negligible impact on the final 58 Ni yield. More importantly, we demonstrate that the lack of [Ni II ] lines in late-time spectra of sub- M Ch events is not always due to an under-abundance of stable Ni; rather, it results from the higher ionization of Ni in the inner ejecta. Conversely, the strong [Ni II ] lines predicted in our 1D M Ch models are completely suppressed when 56 Ni is sufficiently mixed with the innermost layers, which are rich in stable iron-group elements. Conclusions. [Ni II ] lines in late-time SN Ia spectra have a complex dependency on the abundance of stable Ni, which limits their use in distinguishing among M Ch and sub- M Ch progenitors. However, we argue that a low-luminosity SN Ia displaying strong [Ni II ] lines would most likely result from a Chandrasekhar-mass progenitor." @default.
• W3203802971 created "2021-10-11" @default.
• W3203802971 creator A5010114622 @default.
• W3203802971 creator A5018592190 @default.
• W3203802971 creator A5038830689 @default.
• W3203802971 creator A5076424538 @default.
• W3203802971 creator A5081979210 @default.
• W3203802971 date "2022-04-01" @default.
• W3203802971 modified "2023-10-15" @default.
• W3203802971 title "Stable nickel production in type Ia supernovae: A smoking gun for the progenitor mass?" @default.
• W3203802971 cites W1800135403 @default.
• W3203802971 cites W1845072900 @default.
• W3203802971 cites W1922957809 @default.
• W3203802971 cites W1969184333 @default.
• W3203802971 cites W1970787753 @default.
• W3203802971 cites W1980329912 @default.
• W3203802971 cites W1981467550 @default.
• W3203802971 cites W1983245604 @default.
• W3203802971 cites W1993985662 @default.
• W3203802971 cites W1995618220 @default.
• W3203802971 cites W2004662760 @default.
• W3203802971 cites W2006309289 @default.
• W3203802971 cites W2007843551 @default.
• W3203802971 cites W2014812488 @default.
• W3203802971 cites W2018613643 @default.
• W3203802971 cites W2020198826 @default.
• W3203802971 cites W2031415668 @default.
• W3203802971 cites W2035509900 @default.
• W3203802971 cites W2037848192 @default.
• W3203802971 cites W2038347333 @default.
• W3203802971 cites W2041277675 @default.
• W3203802971 cites W2050570130 @default.
• W3203802971 cites W2052288018 @default.
• W3203802971 cites W2052867980 @default.
• W3203802971 cites W2058157392 @default.
• W3203802971 cites W2070193900 @default.
• W3203802971 cites W2074422222 @default.
• W3203802971 cites W2076306112 @default.
• W3203802971 cites W2077218033 @default.
• W3203802971 cites W2082637879 @default.
• W3203802971 cites W2086492072 @default.
• W3203802971 cites W2091971045 @default.
• W3203802971 cites W2096471541 @default.
• W3203802971 cites W2106960949 @default.
• W3203802971 cites W2118114716 @default.
• W3203802971 cites W2127392678 @default.
• W3203802971 cites W2139423999 @default.
• W3203802971 cites W2143328208 @default.
• W3203802971 cites W2145779706 @default.
• W3203802971 cites W2171695188 @default.
• W3203802971 cites W2340609967 @default.
• W3203802971 cites W2466469550 @default.
• W3203802971 cites W2620950176 @default.
• W3203802971 cites W2623493695 @default.
• W3203802971 cites W2765153081 @default.
• W3203802971 cites W2769433608 @default.
• W3203802971 cites W2771036635 @default.
• W3203802971 cites W2782652252 @default.
• W3203802971 cites W2795090812 @default.
• W3203802971 cites W2800542396 @default.
• W3203802971 cites W2888409493 @default.
• W3203802971 cites W2899103457 @default.
• W3203802971 cites W2899497983 @default.
• W3203802971 cites W2913489678 @default.
• W3203802971 cites W2924236819 @default.
• W3203802971 cites W3011337201 @default.
• W3203802971 cites W3014140255 @default.
• W3203802971 cites W3065935729 @default.
• W3203802971 cites W3092521405 @default.
• W3203802971 cites W3096229154 @default.
• W3203802971 cites W3098047169 @default.
• W3203802971 cites W3098075144 @default.
• W3203802971 cites W3098344336 @default.
• W3203802971 cites W3098646158 @default.
• W3203802971 cites W3098770410 @default.
• W3203802971 cites W3098992170 @default.
• W3203802971 cites W3099716837 @default.
• W3203802971 cites W3100093701 @default.
• W3203802971 cites W3100590867 @default.
• W3203802971 cites W3100656781 @default.
• W3203802971 cites W3100762863 @default.
• W3203802971 cites W3100799076 @default.
• W3203802971 cites W3100833260 @default.
• W3203802971 cites W3101064811 @default.
• W3203802971 cites W3101843634 @default.
• W3203802971 cites W3102209316 @default.
• W3203802971 cites W3102379503 @default.
• W3203802971 cites W3102667959 @default.
• W3203802971 cites W3102842584 @default.
• W3203802971 cites W3104237033 @default.
• W3203802971 cites W3104562450 @default.
• W3203802971 cites W3105590454 @default.
• W3203802971 cites W3106154096 @default.
• W3203802971 cites W3106372583 @default.
• W3203802971 cites W3106405403 @default.
• W3203802971 cites W3123215249 @default.
• W3203802971 cites W3123603992 @default.
• W3203802971 cites W3123622996 @default.

• next