使用NICI独立确认β Piclidb成像
Independent confirmation of β Pictoris b imaging with NICI
摘要：
上下文β Picardia b是目前研究最多的天体之一，因为它被VLT/NaCo确定为真正的系外行星，质量约为木星的9倍，轨道距离为8 - 9 AU。行星和尘埃盘之间的联系是明确的证明，这个系统提供了一个机会，研究磁盘/行星的相互作用，并限制气体巨行星的形成和演化模型。尽管如此，到目前为止，β Picasso b从未被其他望远镜证实过。目标。我们的目标是使用不同的工具进行独立确认。方法.我们检索档案图像从南双子座获得的仪器NICI，这是专为高对比度成像。这些观测结合了日冕照相术和角微分成像，并在2008年11月，2009年12月和2010年12月的三个时期获得。结果我们报告了2010年12月NICI在404 \pm 10 mas和PA = 212.1 \pm 0.7 °的分离图像中发现的行星β Picasso b。这是第一次用不同于VLT的望远镜观察这颗行星。
英文摘要：
Context. β Pictoris b is one of the most studied objects nowadays since it was identified with VLT/NaCo as a bona-fide exoplanet with a mass of about 9 times that of Jupiter at an orbital separation of 8-9 AU. The link between the planet and the dusty disk is unambiguously attested and this system provides an opportunity to study the disk/planet interactions and to constrain formation and evolutionary models of gas giant planets. Still, β Pictoris b had never been confirmed with other telescopes so far. Aims. We aimed at an independent confirmation using a different instrument. Methods. We retrieved archive images from Gemini South obtained with the instrument NICI, which is designed for high contrast imaging. The observations combine coronagraphy and angular differential imaging and were obtained at three epochs in Nov. 2008, Dec. 2009 and Dec. 2010. Results. We report the detection with NICI of the planet β Pictoris b in Dec. 2010 images at a separation of 404 \pm 10 mas and P A = 212.1 \pm 0.7° . It is the first time this planet is observed with a telescope different than the VLT.
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