Estate Law Questions? Ask an Estate Lawyer.
I am very sorry for your loss.
In this situation you would not be. However, you may apply to be appointed administrator and alternatively may ask the court to recognize his last will, which absent objection, may get admitted.
Who the rep is not so important. You can apply as well. You may also apply to have will admitted.
You may pursue either option by lawyer application, for which martindale.com is a great resource.