Free Access

 

 

Table 1:

Ages and age uncertainties  $\sigma _{\rm Age}$of metal-poor stars and the Sun obtained for different chronometer pairs X/Y.
X/Y Object Agea $\sigma _{\rm Age}$
    [Gyr] [Gyr]
Th/Eu HD 115444 11.7 10.4 12.3 14.6 6.9
Th/Os HD 115444 30.1 24.3     7.7
Th/Eu CS 22892-052b 14.8 13.4 15.4 17.6 6.4
Th/Hf CS 22892-052 27.7       7.4
Th/Os CS 22892-052 19.6 14.8     18.5
Th/Eu CS 22892-052 15.4 13.1 15.0 17.3 5.3
Th/Os CS 22892-052 24.4 18.6     5.1
Th/Ir CS 22892-052 25.8 19.1 25.2   12.9
Th/Eu CS 22892-052 12.1 11.7 13.7 15.9 4.8
Th/Hf CS 22892-052 24.6       6.1
Th/Os CS 22892-052 26.0 20.3     7.7
Th/Ir CS 22892-052 19.0 13.3 19.4   6.1
Th/Eu BD +17 3248 7.6 6.3 8.3 10.5 5.3
Th/Os BD +17 3248 27.7 22.0     6.1
Th/Ir BD +17 3248 20.7 14.0 19.1   7.7
Th/Eu HD 221170 11.7 10.4 12.3 14.6 4.2
Th/Hf HD 221170 21.9       2.9
Th/Os HD 221170 27.1 22.3     5.3
Th/Ir HD 221170 20.7 14.0 19.1   6.1
Th/Eu CS 31082-001 0.9 -1.5 0.5 2.7 2.9
Th/Hf CS 31082-001 15.2       8.0
Th/Os CS 31082-001 17.9 12.1     5.9
Th/Ir CS 31082-001 6.5 -0.2 5.9   4.1
U/Th CS 31082-001 16.6 13.3 14.6   5.9
Th/Eu HE 1523-0901 11.4 9.5 11.0 13.2 3.1
Th/Os HE 1523-0901 16.9 10.1     3.1
Th/Ir HE 1523-0901 18.0 12.3 17.4   3.1
U/Th HE 1523-0901 15.0       2.6
Th/Eu M51 K341 11.0 9.7 12.6 13.9 6.9
Th/Eu M51 K462 14.1 12.7 14.7 16.9 6.9
Th/Eu M51 K583 6.6 4.3 7.2 8.5 6.9
Th/Hf M4 L1411 32.5       3.4
Th/Hf M4 L1411 32.5       3.4
Th/Hf M4 L1501 25.5       3.4
Th/Hf M4 L1514 37.2       3.4
Th/Hf M4 L2406 32.5       3.4
Th/Hf M4 L2617 23.2       3.4
Th/Hf M4 L3209 30.2       3.4
Th/Hf M4 L3413 23.2       3.4
Th/Hf M4 L4511 27.8       3.4
Th/Hf M4 L4611 37.2       3.4
Th/Hf M5 IV-81 18.5       3.4
Th/Hf M5 IV-82 18.5       3.4
Th/Eu HD 108577 7.8 6.2 8.4 10.1 3.4
Th/Eu HD 115444 9.6 8.1 10.3 11.9 3.6
Th/Eu HD 186478 16.6 15.1 17.3 18.9 4.3
Th/Eu BD +82856 7.3 5.8 8.0 9.6 5.5
Th/Eu M92 VII-18 6.8 5.3 7.5 9.1 5.3
Th/Eu Sun 3.3 1.7 3.9 5.6 2.0
Th/Hf Sun 22.3       2.3
Th/Os Sun 14.1 8.6     4.9
Th/Ir Sun 10.1 4.0 9.6   4.9

a Ages and age uncertainties are obtained from formulae (8) and (9) using the abundances listed in Table A.1. The four ``Age'' columns give ages based on production rations $\beta$ of Kratz et al. (2007), Sneden et al. (2003), Schatz et al. (2002), and Cowan et al. (2002) (in that order) according to Table A.2. The Solar ages are calculated applying r-process fractions as given in Table A.3.
b Three independent measurements were obtained for this star which is the reason why certain chronometer pair/object combinations are listed multiple times.


Source LaTeX | All tables | In the text

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.