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    PR # 31116                                                                   
     A working hypothesis is proposed for the abundance problem of the X-r       
     ay halo in elliptical galaxies; heavy elements created in supernovae        
     are hot enough to escape from galaxies and only the gas from stellar        
     mass loss with subsolar metallicity is retained in the x-ray halo. If       
      so, high Lx/LB objects should cotainn gas created in older time beca       
     use gas supply rate from stellar mass loss is proportional to LB. Sin       
     ce supernova rate is considered to be higher in the past, the hypothe       
     sis predicts higher metal abundance for larger Lx objects. We propose       
      to test this with ASCA for high Lx E-galaxies.                             
                                                                                 
                                                                                 
                                                                                 
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