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

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.

arXiv comment8 pages, 0 figures. Accepted for publication in the Astrophysical Journal Letters

References in corpus (5)

• Proper Motions of the BN Object and the I Radio Source in Orion: Where and When Did BN Become a Runaway Star?
• Compact Radio Sources in Orion: New Detections, Time Variability, and Objects in OMC-1S
• The Becklin-Neugebauer Object as a Runaway B Star, Ejected 4000 years ago from the theta^1C system
• Fine Scale Temperature Fluctuations in the the Orion Nebula and the t^2 Problem
• Low-Mass Runaway Stars from the Orion Trapezium Cluster

Cited by in corpus (6)

• The Gould's Belt Distances Survey (GOBELINS) II. Distances and structure towards the Orion Molecular Clouds
• Kinematic Structure of the Orion Nebula Cluster and its Surroundings
• Runaway and walkaway stars from the ONC with Gaia DR2
• The IMF of stellar clusters: effects of accretion and feedback
• The Hubble Space Telescope Treasury Program on the Orion Nebula Cluster
• HST astrometry in the Orion Nebula Cluster: census of low-mass runaways