2005MNRAS.359L..35F

The very recent suggestion for the identification of a faint G-type subgiant, dubbed `Tycho G', as the binary progenitor of Tycho Brahe's 1572 Type Ia supernova by Ruiz-Lapuente et al. is essentially based on the peculiar space velocity of the star. Here we demonstrate that the kinematics of Tycho G are likewise in keeping with the stars of the Milky Way's thick-disc population. Hence we may well be seeing an object that is only coincidentally passing in the vicinity of the supernova remnant, or Tycho Brahe and his contemporaries may indeed have witnessed the late explosion of one of the first stars in the Galaxy.