(Sub-)stellar variability: from 20 M${}_{\odot }$ to 13 M${}_{\mathrm{Jup}}$

Abstract

Massive early-type stars vary; low-mass late-type brown dwarfs vary, too. I will make a short, but illustrative, summary of my previous studies on stellar and sub-stellar photometric variability (including the discovery of the most variable brown dwarf in the whole sky), and explain how amateurs can help professional astronomers with our investigations.

Published in "Proceedings of the 47th Conference on Variable Stars Research", Variable Star and Exoplanet Section of Czech Astronomical Society, 27-29 Nov 2015, Ostrava Planetarium, Ostrava, Czech Republic