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首页> 外文期刊>The Astrophysical journal >SPATIALLY RESOLVED OBSERVATIONS OF THE BIPOLAR OPTICAL OUTFLOW FROM THE BROWN DWARF 2MASS J12073347–3932540*
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SPATIALLY RESOLVED OBSERVATIONS OF THE BIPOLAR OPTICAL OUTFLOW FROM THE BROWN DWARF 2MASS J12073347–3932540*

机译:空间分辨分辨的观测值,从棕色矮人2质J12073347–3932540 *的双极性光学流出物*

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Studies of brown dwarf (BD) outflows provide information pertinent to questions on BD formation, as well as allowing outflow mechanisms to be investigated at the lowest masses. Here new observations of the bipolar outflow from the 24 M JUP BD 2MASS?J12073347–3932540 are presented. The outflow was originally identified through the spectro-astrometric analysis of the [O I]λ6300 emission line. Follow-up observations consisting of spectra and [S II], R-band and I-band images were obtained. The new spectra confirm the original results and are used to constrain the outflow position angle (P.A.) at ~65°. The [O I]λ6300 emission line region is spatially resolved and the outflow is detected in the [S II] images. The detection is firstly in the form of an elongation of the point-spread function (PSF) along the direction of the outflow P.A. Four faint knot-like features (labeled A-D) are also observed to the southwest of 2MASS?J12073347–3932540 along the same P.A. suggested by the spectra and the elongation in the PSF. Interestingly, D, the feature furthest from the source, is bow shaped with the apex pointing away from 2MASS?J12073347–3932540. A color-color analysis allows us to conclude that at least feature D is part of the outflow under investigation while A is likely a star or galaxy. Follow-up observations are needed to confirm the origin of B and C. This is a first for a BD, as BD optical outflows have to date only been detected using spectro-astrometry. This result also demonstrates for the first time that BD outflows can be collimated and episodic.
机译:对褐矮星(BD)外流的研究提供了有关BD形成问题的信息,并允许以最低质量调查外流机制。这里介绍了从24 M JUP BD 2MASS?J12073347–3932540产生的双极流出的新观测结果。最初是通过[O I]λ6300发射谱线的光谱-天文分析确定流出的。获得了由光谱和[S II],R波段和I波段图像组成的后续观察结果。新光谱确认了原始结果,并用于将流出位置角度(P.A.)限制在〜65°。 [O I]λ6300发射线区域在空间上得到解析,并且在[S II]图像中检测到流出。该检测首先以点扩展函数(PSF)沿流出P.A方向的伸长形式出现。 2MASS?J12073347–3932540的西南沿同一P.A也观察到四个微弱的结状特征(标记为A-D)。由光谱和PSF中的伸长率暗示。有趣的是,距离源头最远的特征D为弓形,其顶点指向2MASS?J12073347–3932540。通过颜色-颜色分析,我们可以得出结论,至少特征D是正在研究的流出的一部分,而特征A可能是恒星或星系。需要进行后续观察以确认B和C的起源。这是BD的首次发现,因为迄今为止,仅使用分光天文法可以检测到BD的光学流出。该结果也首次证明了BD流出可以是准直的和偶发的。

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