Bolometric correction for nearby MS stars

Stellar parameters, light ratios, Gaia Data Release 2 trigonometric parallaxes, extinctions and/or reddening were investigated and only 206 systems were selected as eligible to calculate empirical bolometric corrections. NASA/IPAC Galactic dust maps were the main source of extinctions.

Unreliable extinctions at low Galactic latitudes |b|=<5{deg} were replaced with individual determinations, if they exist in the literature, else associated systems were discarded. The main-sequence stars of te remaining systems were used to calculate the bolometric corrections (BCs) and to calibrate the BC-T_eff_ relation, which is valid in the range 3100-36000K. De-reddened (B-V)_0_ colours, on the other hand, allowed us to calibrate two intrinsic colour-effective temperature relations; the linear one is valid for T_eff_>10000K, while the quadratic relation is valid for T_eff_<10000K; that is, both are valid in the same temperature range in which the BC-T_eff_ relation is valid.