EARLY RESULTS FROM VLT SPHERE: LONG-SLIT SPECTROSCOPY OF 2MASS 0122-2439 B, A YOUNG COMPANION NEAR THE DEUTERIUM BURNING LIMIT
EARLY RESULTS FROM VLT SPHERE: LONG-SLIT SPECTROSCOPY OF 2MASS 0122-2439 B, A YOUNG COMPANION NEAR THE DEUTERIUM BURNING LIMIT
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VLT 球体的早期结果：2MASS 0122-2439 B 的长缝光谱，它是接近氘燃烧极限的年轻伙伴
DOI：
10.1088/2041-8205/805/1/l10
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Hinkley S
中科院分区：
文献类型：
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作者：
Hinkley S
我们给出了在1 farcs 5（50 Au）距离下，围绕着微弱（R = 13.6）、年轻（约1.2亿年）的M矮星2 MASS J 01225093 -2439505（“2 M0122 -2439 B”）运行的12-27 M Jup伴星的0.95-1.80 μm光谱。我们的日冕长缝光谱是在科学验证期间用新的高对比度成像平台甚大望远镜光谱偏振高对比度系外行星研究（SPHERE）获得的。SPHERE独特的长缝能力使光谱分辨率比其他极端AO系外行星成像仪器高一个数量级。2 M 0122 -2439 B质量低，温度低，颜色非常红，在亚恒星色星等图中占据了一个特别重要的区域，它桥接了直接成像的具有M晚期/L早期光谱类型的温暖热行星（例如β Pic B和ROX 42 B B）和L/T过渡附近的较冷尘埃物体（HR 8799 bcde和2 MASS 1207 B）。我们将BT-Settl大气模型与R 350光谱拟合，发现
We present 0.95–1.80 μm spectroscopy of the∼ 12–27 M Jup companion orbiting the faint (R∼ 13.6), young (∼ 120 Myr) M-dwarf 2MASS J01225093–2439505 (" 2M0122–2439 B") at 1 farcs 5 separation (50 AU). Our coronagraphic long-slit spectroscopy was obtained with the new high contrast imaging platform Very Large Telescope Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) during Science Verification. The unique long-slit capability of SPHERE enables spectral resolution an order of magnitude higher than other extreme AO exoplanet imaging instruments. With a low mass, cool temperature, and very red colors, 2M0122–2439 B occupies a particularly important region of the substellar color–magnitude diagram by bridging the warm directly imaged hot planets with late-M/early-L spectral types (eg, β Pic b and ROXs 42Bb) and the cooler, dusty objects near the L/T transition (HR 8799bcde and 2MASS 1207b). We fit BT-Settl atmospheric models to our R≈ 350 spectrum and find