Absolute Ca II H & K and H-alpha flux measurements of low-mass stars: Extending $R_{\mathrm{HK}}^{\prime }$ to M dwarfs

C. J. Marvin, A. Reiners, G. Anglada-Escudé +2

Context: With the recent surge of planetary surveys focusing on detecting Earth-mass planets around M dwarfs, it is becoming more important to understand chromospheric activity in…