Unicorns and Giraffes in the binary zoo: stripped giants with subgiant companions

Kareem El-Badry, Rhys Seeburger, Tharindu Jayasinghe +5

We analyze two binary systems containing giant stars, V723 Mon ("the Unicorn") and 2M04123153+6738486 ("the Giraffe"). Both giants orbit more massive but less luminous companions,…