Star Formation in Orion's L1630 Cloud: An Infrared and Multi-epoch X-Ray Study

Astronomy and Astrophysics – Astronomy

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Scientific paper

We present a combined X-ray/IR study of L1630, a star-forming region in the Orion Molecular Cloud, with the goal of providing insight into the X-ray evolution of young stellar objects (YSOs). We have analyzed 11 Chandra X-Ray Observatory observations, obtained over the course of five years and totaling 200 ks exposure time, targeting the eruptive YSO V1647 Ori in L1630. We used 2MASS and Spitzer data to identify and classify IR counterparts to L1630 X-ray sources that lie within 12' of V1647 Ori. We identified a total of 50 X-ray emitting YSOs with IR counterparts, including a handful of potential examples of X-ray-emitting Class 0/I objects. A subsample of 20 X-ray-emitting YSOs were covered by all 11 Chandra observations targeting V1647 Ori; we present a detailed spectral/temporal analysis of this subsample, aimed at examining the evolution of X-ray spectral and temporal characteristics with YSO class.

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