When did Esther die?

Heads up, this is a LOT of scholarly supposition.  We don’t have a record of Esther’s death, but we also don’t have a record of her life beyond saving the Jews.  Why is that?  It’s possible that Esther died shortly after saving her own people.  Why do we think this is possible? 

Scholars have identified Esther’s husband Ahasuerus as the king whom non-biblical records call Xerxes I (Source).  Xerxes I met a violent end when he was assassinated by his own minister and other members of the court, and his son from his first marriage was made king.  (Source)   If this was a total political takeover then it’s quite possible that the king’s wife, Esther, and her uncle “Mordecai the Jew [who] was next unto king Ahasuerus. . .” were killed as well.  (Source)  If our guess is correct that Esther was 14 when she was married this would mean that she was only 28 when she died.  (Source)  Again, this is a scholarly supposition but an interesting and sad explanation as to why we don’t have any further records from the life of Esther.