Linking [r]. Intrusive [r]

Linking [r]
-er, -re, r + a vowel sound = [r].
Far away – when the first word ends in –r and the following word begins with a vowel, the sound [r] is inserted at the end of the first word. This phenomenon is called the linking [r].

Intrusive [r]
When there is no “r” in spelling, the inserted [r] is called the intrusive [r]: my [r] own. But it is not recommended to use intrusive [r] in English Standard pronunciation.