A circumstellar disk associated with a massive protostellar object
A circumstellar disk associated with a massive protostellar object
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DOI：
10.1038/nature04012
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发表时间：
2005-09
期刊：
影响因子：
64.8
通讯作者：
Zhibo Jiang;M. Tamura;M. Fukagawa;J. Hough;P. Lucas;H. Suto;M. Ishii;Ji Yang
中科院分区：
文献类型：
--
作者：
Zhibo Jiang;M. Tamura;M. Fukagawa;J. Hough;P. Lucas;H. Suto;M. Ishii;Ji Yang
质量是太阳质量数倍的恒星的形成过程尚不清楚。两种主要的理论是几个低质量年轻恒星物体的合并，这需要高恒星密度，或者像形成低质量恒星一样，从星盘周围产生质量吸积，并在引力坠落过程中伴随着流出。尽管已经在低质量和中等质量的年轻恒星物体周围发现了一些圆盘，但大质量年轻恒星物体周围是否存在圆盘仍然是不确定的，其中一个物体M17周围探测到的圆盘系统的质量也存在争议。在这里，我们报道了近红外成像偏振技术，揭示了围绕贝克林-诺格鲍尔原恒星物体的流出/盘状系统，该天体的质量至少有7个太阳质量(M⊙)。这有力地支持了这样一种理论，即质量至少为7M⊙的恒星与质量较低的恒星形成方式相同。
The formation process for stars with masses several times that of the Sun is still unclear. The two main theories are mergers of several low-mass young stellar objects, which requires a high stellar density, or mass accretion from circumstellar disks in the same way as low-mass stars are formed, accompanied by outflows during the process of gravitational infall. Although a number of disks have been discovered around low- and intermediate-mass young stellar objects,, the presence of disks around massive young stellar objects is still uncertain and the mass of the disk system detected around one such object, M17, is disputed. Here we report near-infrared imaging polarimetry that reveals an outflow/disk system around the Becklin–Neugebauer protostellar object, which has a mass of at least seven solar masses (M⊙). This strongly supports the theory that stars with masses of at least 7M⊙form in the same way as lower mass stars.