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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >V1647 Orionis (IRAS 05436-0007): A new look at McNeil's nebula
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V1647 Orionis (IRAS 05436-0007): A new look at McNeil's nebula

机译：V1647 Orionis（IRAS 05436-0007）：麦克尼尔星云的新外观

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摘要

We present a study of the newly discovered McNeil's nebula in Orion using simultaneous observations of the J H K-s-bands with the near-infrared (NIR) camera SIRIUS on the IRSF 1.4m telescope. The cometary infrared nebula is clearly seen extending toward both north and south from the NIR source (V1647 Orionis), which illuminates McNeil's nebula. The compact nebula has an apparent diameter of about 70 ''. The nebula is blue (bright in J) and has a cavity structure with two rims extending toward the north-east and the north-west. The north-east rim is brighter and sharp, while the north-west rim is diffuse. The north-east rim can be traced out to similar to 40 '' from the location of the NIR source. In contrast, no cavity structure can be seen toward the south, although the diffuse nebula is extended out to similar to 20 ''. New NIR photometric data show a significant variation in the magnitudes (> 0.15 mag) of the source of McNeil's nebula within a period of one week, which is possibly under the phase of eruptive variables, like FUors or EXors.
机译：我们使用IRSF 1.4m望远镜在近红外（NIR）相机SIRIUS上同时观测J H K-s波段，对Orion中新发现的McNeil星云进行了研究。从NIR源（V1647 Orionis）向北和向南延伸的彗星红外星云清晰可见，它照亮了麦克尼尔的星云。致密星云的表观直径约为70英寸。星云是蓝色的（明亮的J形），具有一个空腔结构，带有两个向东北和西北方向延伸的边缘。东北边缘较明亮而锐利，而西北边缘则较分散。从NIR源位置可以看出东北边缘大约40英寸。相反，尽管弥漫性星云向外扩展至类似于20英寸，但看不到任何腔结构。新的近红外光度数据显示，在一周内，麦克尼尔星云源的幅度（> 0.15 mag）发生了显着变化，这可能处于爆发变量（如FUor或EXor）的阶段。

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