Photospheric and chromospheric activity in V405 And: An M dwarf binary with components on the two sides of the full convection limit

K. Vida, K. Oláh, Zs. Kővári +4

We investigate the fast-rotating (P_orb=P_rot=0.465d), active dwarf binary V405 And (M0V+M5V) using photometric BV(RI)_C and optical spectroscopic data. The light variation is caus…