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Paper: Evidence for a Solar System Size Accretion Disk Around the Massive Protostar G192.16-3.82
Volume: 267, Hot Star Workshop III: the Earliest Stages of Massive Star Birth
Page: 415
Authors: Shepherd, D. S.; Claussen, M. J.; Kurtz, S. E.
Abstract: Milliarcsecond resolution seven millimeter continuum observations of a massive bipolar outflow source, G192.16-3.82, were made using a new capability that links the National Radio Astronomy Observatory's Very Large Array radio interferometer with the Very Large Baseline Array antenna located in Pie Town, New Mexico. The observations provide for the first time evidence for a true accretion disk that is about the size of our Solar system around a massive star. A model of the radio emission suggests the presence of a binary protostellar system. The primary protostar, G192 S1, at the center of the outflow, with M* approx 8 - 10 Msun, is surrounded by an accretion disk with a diameter of 130 Astronomical Units (AU). The mass of the disk, Md, is on the order of M*. The outflow is poorly collimated with a full opening angle of sim 40 deg; there is no indication of a more highly collimated jet-like component. The companion source, G192 S2, is located 80 AU north of the primary.
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