X-ray emission of the young stellar population of the Orion B molecular cloud

We carried out an analysis of nine XMM-Newton archive observations covering a significant part of the Orion B molecular Cloud. We completed the analysis by using Infrared (Spitzer, WISE, and 2MASS) and Optical (Optical Monitor and UCAC4) photometry data. This work is focused on the classification and characterization of young stellar objects and the inhomogeneity along the cloud. From nine X-ray observations we detected 604 sources in which 490 of them have at least a counterpart. We obtained the X-ray coronal properties of 49 sources with more than 100 net counts, using the 1T or 2T-model of XSPEC. After rejecting the background sources we classified the sample in 332 Classes III, 141 Classes II and 11 Classes 0/I based on their infrared properties. We explored the differences along the cloud and discovered 5 different groups where Class 0/I and Class II objects are located, coincident with NGC2023, NGC2024, NGC2068, NGC2071 and around V1647-Ori. We compared the X-ray luminosity functions for the different classes obtained, and also the complete sample with the COUP distribution, which reveals similar populations.