Free Access

Table 2

Pearson product-moment correlation coefficient R2 for every line and spectrum.

R2 (He i) R2 (He ii) R2 (He i) R2 (He ii)

1 0.9658 0.9732 27 0.9161 0.8906
2 0.9080 0.9758 28 0.8847 0.8661
3 0.9622 0.9710 29 0.9072 0.8784
4 0.9908 0.9947 30 0.9278 0.9373
5 0.9853 0.9854 31 0.8759 0.8660
6 0.8761 0.8916 32 0.9421 0.8825
7 0.7351 0.8326 33 0.8006 0.9583
8 0.7357 0.8810 34 0.7078 0.9559
9 0.9803 0.9895 35 0.6737 0.9359
10 0.8315 0.9744 36 0.6231 0.9060
11 0.9258 0.9736 37 0.5603 0.8708
12 0.5886 0.6960 38 0.9376 0.9827
13 0.9638 0.9666 39 0.9507 0.9764
14 0.8986 0.9369 40 0.9113 0.9535
15 0.8891 0.9649 41 0.8898 0.9421
16 0.7631 0.9373 42 0.8169 0.9231
17 0.8054 0.8816 43 0.7397 0.9035
18 0.8165 0.8603 44 0.8923 0.8645
19 0.8498 0.9027 45 0.9299 0.8972
20 0.9868 0.9903 46 0.9155 0.8770
21 0.9453 0.9962 47 0.8925 0.8754
22 0.8163 0.9823 48 0.9089 0.9248
23 0.8849 0.8668 49 0.9488 0.9575
24 0.9044 0.9746 50 0.9255 0.8428
25 0.7900 0.8872 51 0.9279 0.9180
26 0.8968 0.8978 52 0.9147 0.9147

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.