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HST Images Do Not Support the Presence of Three High Velocity, Low-Mass Stars in the Core of the Orion Nebula Cluster

C. R. O'Dell·Arcadio Poveda·Christine Allen·Massimo Robberto
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Abstract

A recent article has employed the determination from groundbased images of high proper motions in the Orion Nebula Cluster to argue that JW 349, JW 355, and JW 451 are high velocity (38 km/s, 89 km/s, and 69 km/s, respectively) low mass runaway stars. We report on measurement of the proper motions of these stars using images made by the Hubble Space Telescope's WFPC2 imager and find that there is no evidence for motions above 6.2 km/s for JW 349 and 7.9 km/s for JW 355, while the motion of 5.5 km/s for JW 451 is only slightly larger than the measurement uncertainty of 3.9 km/s. We conclude that there is no observational support for these stars being high velocity runaway stars.

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C. R. O'Dell, Arcadio Poveda, Christine Allen, Massimo Robberto. 2005-10-04. HST Images Do Not Support the Presence of Three High Velocity, Low-Mass Stars in the Core of the Orion Nebula Cluster. https://doi.org/10.1086/498450

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