The Becklin-Neugebauer Object as a Runaway B Star, Ejected 4000 Years Ago from the θ1 Orionis C System

作者: Jonathan C. Tan

DOI: 10.1086/421721

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摘要: We attempt to explain the properties of Becklin-Neugebauer (BN) object as a runaway B star, originally proposed by Plambeck et al. This is one best-studied bright infrared sources, located in Orion Nebula Cluster—an important testing ground for massive star formation theories. From radio observations BN object's proper motion, we trace its trajectory back Trapezium θ1 Ori C, most (45 M☉) cluster and relatively tight (17 AU) visual binary with secondary. origin would be recent known ejection event, occurring only ~4000 years ago providing unique test models. Although highly obscured, can constrain mass (7 from both bolometric luminosity recoil C. Interaction dense ambient gas should produce compact wind bow shock. suggest that X-ray emission this shocked may have been seen Chandra: offset position 300 AU direction motion. Given model, density, mass-loss rate, velocity. The made closest approach protostar, source I, 500 years ago. triggered enhanced accretion thus outflow, consistent previous interpretations outflow being (~103 yr) explosive event.

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