Table 6.
Trend of Th/Eu with r-process enrichment.
| Star | Eu | Th | (Th/Eu) | Regime 3 | [Eu/Fe] |
|---|---|---|---|---|---|
| (complete r-process) subclass | |||||
| TYC5329-1927-1 | −1 | −1.91 | 0.12 | r-I | 0.89 |
| J0858−0809 | −2.41 | −3.07 | 0.22 | r-I | 0.23 |
| HD 108317 | −1.37 | −1.99 | 0.24 | r-I | 0.64 |
| HD 110184 | −1.91 | −2.5 | 0.26 | r-I | 0.08 |
| HE1523−0901 | −0.62 | −1.2 | 0.26 | r-II | 1.86 |
| CS22892−052 | −0.86 | −1.42 | 0.28 | r-II | 1.53 |
| HD 186478 | −1.34 | −1.85 | 0.31 | r-I | 0.63 |
| CS29491−069 | −0.96 | −1.46 | 0.32 | r-II | 1.12 |
| RAVEJ203843.2−002333 | −0.75 | −1.24 | 0.32 | r-II | 1.64 |
| CS29497−004 | −0.68 | −1.17 | 0.32 | r-II | 1.44 |
| J1432−4125 | −1.01 | −1.47 | 0.35 | r-II | 1.44 |
| HE0240−0807 | −1.44 | −1.9 | 0.35 | r-I | 0.55 |
| BD−155781 | −2.28 | −2.73 | 0.35 | r-I | 0.12 |
| HE2224+0143 | −1.02 | −1.47 | 0.35 | r-I | 0.87 |
| HE2327−5642( * ) | −1.29 | −1.67 | 0.42 | r-II | 1.07 |
| HD 6268( * ) | −1.56 | −1.93 | 0.43 | r-I | 0.54 |
| HD 115444( * ) | −1.64 | −1.97 | 0.47 | r-I | 0.68 |
| HE2252−4225( * ) | −1.3 | −1.63 | 0.47 | r-II | 1.12 |
| CS22953−003( * ) | −1.69 | −1.92 | 0.59 | r-I or r-II | 0.92 |
| CS31082−001( * ) | −0.76 | −0.98 | 0.60 | r-II | 1.62 |
| CS30315−029( * ) | −2.24 | −2.45 | 0.62 | r-I | 0.67 |
| HE1219−0312( * ) | −0.98 | −1.19 | 0.62 | r-II | 1.47 |
| redCS31078−018( * ) | −1.17 | −1.35 | 0.66 | r-II | 1.15 |
| 2MASSJ09544277+5246414( * ) | −1.19 | −1.31 | 0.76 | r-II | 1.28 |
Notes. (Present day) Observed Eu and Th abundances in log ϵ(X) = log(NX/NH + 12) values in low metallicity stars ([Fe/H] < −2.4). The corresponding solar system ratio at the time of its birth (representing the ISM when the solar system got detached) is 0.45 or 0.42 (Lodders et al. 2009; Lodders 2020). Based on their present Th/Eu ratios, the stars with an asterisk would be considered as an actinde-boost stars with Th/Eu > 0.42.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.