Towards a New Prescription for the Tidal Capture of Planets, Brown Dwarfs and Stellar Companions Available to Purchase

We study the evolution of the orbit of a planetary companion as the primary star evolves during the red giant branch phase. Our aim is to determine a prescription for the capture radius and capture timescales for companions in a wide range of masses, from planet to star, including the effect of a non constant ƒ parameter. Our initial results reproduce past findings. According to our study the mass‐loss during the red giant branch does not significantly affect the semi major axis of the planet and for a $1.5 M⊙$ star the capture radius is approximately $300 R⊙$ or 1.4 AU.