The Orion luminosity/mass function revisited

Abstract

I present an analysis of the luminosity/mass function of the largest groups identified towards the Orion Complex. Those groups were determined using spectroscopic and astrometric data from APOGEE-2 and Gaia DR2 by applying a hierarchical clustering algorithm to the six-dimensional stellar data. I used Gaussian mixture models to represent the sample, and have found luminosity/mass function sub-structures in the explored regions. I have tested the approach with the most recent member list of 25~Ori cluster as a verification sample, reproducing the found sub-structures in its luminosity/mass function.