New Low-Mass PMS Eclipsing Binaries In Orion

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Scientific paper

In Fall 2009, we conducted a large, multi-wavelength time-series photometric monitoring campaign of about a one square degree region of the Orion Nebula cluster (ONC). Our program produced light curves for 2000 Orion young stellar objects (YSOs), with data often in at least four bands (I, J, [3.6] and [4.5]). While our primary goal was to use these data to investigate the structure of the inner disk and time-variable accretion in YSOs with circumstellar disks, these data also provide a treasury of data on all types of pre-main-sequence (PMS) variability. Specifically, we identify nine stars in our FOV whose light curves show eclipse features. Four of these are the previously known ONC eclipsing binaries (EBs) and the other five systems are newly identified ONC PMS EB candidates - more than doubling what was known up to now. Here we present our current work to confirm these candidates.

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