Shepherd D S, Claussen M J, Kurtz S E
National Radio Astronomy Observatory, Post Office Box 0, Socorro, NM 87801, USA.
Science. 2001 May 25;292(5521):1513-8. doi: 10.1126/science.1059475.
Seven-millimeter continuum observations of a massive bipolar outflow source, G192.16-3.82, were made at a milli-arc-second resolution with a capability that links the National Radio Astronomy Observatory's Very Large Array radio interferometer with the Very Long Baseline Array antenna, located in Pie Town, New Mexico. The observations provide evidence for a true accretion disk that is about the size of our solar system and located 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 a protostar mass of about 8 to 10 times the solar mass, is surrounded by an accretion disk with a diameter of 130 astronomical units (AU). The mass of the disk is on the order of the protostar mass. The outflow is poorly collimated with a full opening angle of about 40 degrees; there is no indication of a more highly collimated jetlike component. The companion source, G192 S2, is located 80 AU north of the primary source.
利用将位于新墨西哥州派镇的美国国家射电天文台甚大天线阵射电干涉仪与甚长基线阵天线相连接的设备，以毫角秒分辨率对一个大质量双极外流源G192.16 - 3.82进行了7毫米连续谱观测。这些观测为一个真正的吸积盘提供了证据，该吸积盘大小约为我们的太阳系，位于一颗大质量恒星周围。射电辐射模型表明存在一个双星原恒星系统。位于外流中心的主原恒星G192 S1，其原恒星质量约为太阳质量的8到10倍，被一个直径为130天文单位（AU）的吸积盘环绕。该盘的质量与原恒星质量相当。外流的准直性较差，全开角约为40度；没有迹象表明存在更高度准直的喷流状成分。伴源G192 S2位于主源以北80天文单位处。
