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首页> 外文期刊>The Astrophysical journal >A Young-planet Search In Visible And Infrared Light: Dn Tauri, V836 Tauri, And V827 Tauri
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A Young-planet Search In Visible And Infrared Light: Dn Tauri, V836 Tauri, And V827 Tauri

机译：在可见光和红外光下进行的小行星搜索：Dn Tauri，V836 Tauri和V827 Tauri

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摘要

In searches for low-mass companions to late-type stars, correlation between radial velocity variations and line bisector slope changes indicates contamination by large starspots. Two young stars demonstrate that this test is not sufficient to rule out starspots as a cause of radial velocity variations. As part of our survey for substellar companions to T Tauri stars, we identified the ～2 Myr old planet host candidates DN Tau and V836 Tau. In both cases, visible-light radial velocity modulation appears periodic and is uncorrelated with line bisector span variations, suggesting close companions of several M_(Jup) in these systems. However, high-resolution, infrared spectroscopy shows that starspots cause the radial velocity variations. We also report unambiguous results for V827 Tau, identified as a spotted star on the basis of both visible-light and infrared spectroscopy. Our results suggest that infrared follow-up observations are critical for determining the source of radial velocity modulation in young, spotted stars.
机译：在寻找晚型恒星的低质量伴星时，径向速度变化和线平分线斜率变化之间的相关性表明了大星点的污染。两名年轻的恒星表明，该测试不足以排除星点引起的径向速度变化。作为对Ta Tauri星的星际伴星的调查的一部分，我们确定了〜2 Myr老行星的寄宿星候选DN Tau和V836 Tau。在这两种情况下，可见光径向速度调制都是周期性出现的，并且与线等分线跨度变化不相关，这表明这些系统中几个M_（Jup）的紧密伴侣。但是，高分辨率红外光谱显示星点会引起径向速度变化。我们还报告了V827 Tau的明确结果，根据可见光和红外光谱将其识别为斑点星。我们的结果表明，红外跟踪观测对于确定年轻斑点恒星径向速度调制的来源至关重要。

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