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Results and Discussion

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Results and Discussion

The resulting - tex2html_wrap_inline8953 diagram is presented in Figures 53 and 54 (upper panel) for tex2html_wrap_inline8965 , and in Figsures 53 and 54 (lower panel) for tex2html_wrap_inline8967 .

 
Figure 53: The - tex2html_wrap_inline8953 curves for all SN types for tex2html_wrap_inline8965 (left-hand panel) and tex2html_wrap_inline8967 (right-hand panel) (Jorgensen et al., 1996).  

 
Figure 54: The - tex2html_wrap_inline8953 curves for 4 SN types for tex2html_wrap_inline8965 (upper panel) and tex2html_wrap_inline8967 (lower panel) (Jorgensen et al., 1996). 

As the SN activity in the first generation stellar population must be small at present, the net SN rate in the vicinity of the Sun is approximately proportional to the local density of stars of second generation (or to the star formation rate, which is the same), especially for SN II and SN Ib.

If a tex2html_wrap_inline9046 -like star formation of the first generation stars took place, a hump on the observed - tex2html_wrap_inline8953 showing the relative fraction of the first generation stars should be observed.

We conclude that the analysis of the observed - tex2html_wrap_inline8953 could potentially provide us with important information on the fraction of first generation stars (if any), the history of star formation rates and the parameters of the evolution model.


Mike E. Prokhorov
Sat Feb 22 18:38:13 MSK 1997