Final answer:
Octavius Caesar, also known as Augustus, became the new Emperor of Rome after the death of Julius Caesar.
Step-by-step explanation:
The new Emperor of Rome who became Caesar's heir was Octavius Caesar. After the assassination of Julius Caesar in 44 BC, Octavius, also known as Octavian, rose to power and became the first Roman Emperor. He adopted the name Augustus and ruled Rome from 27 BC until his death in 14 AD.
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