Just to complete answers of Raman and Babu as above:
1/ in the table RSDDAGGRDIR get the aggregate tech name for particular cube e.g. 100098 by filtering the table OBJVERS = A
2/ go to TA SE11 and find all the tables associated with your aggregate tech name e.g. *100098* you will get tables/views like:
/BIC/E100098 - compressed table of aggregate
/BIC/F100098 - fact table of aggregate
/BIC/V100098F - fact view
/BIC/D100098x - where x represents different dimensions of your particular cube
cheers
m./