【2h】

First light of the Gemini Planet Imager

机译:双子座行星成像仪的第一缕曙光

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The Gemini Planet Imager is a dedicated facility for directly imaging and spectroscopically characterizing extrasolar planets. It combines a very high-order adaptive optics system, a diffraction-suppressing coronagraph, and an integral field spectrograph with low spectral resolution but high spatial resolution. Every aspect of the Gemini Planet Imager has been tuned for maximum sensitivity to faint planets near bright stars. During first-light observations, we achieved an estimated H band Strehl ratio of 0.89 and a 5-σ contrast of 106 at 0.75 arcseconds and 105 at 0.35 arcseconds. Observations of Beta Pictoris clearly detect the planet, Beta Pictoris b, in a single 60-s exposure with minimal postprocessing. Beta Pictoris b is observed at a separation of 434 ± 6 milliarcseconds (mas) and position angle 211.8 ± 0.5°. Fitting the Keplerian orbit of Beta Pic b using the new position together with previous astrometry gives a factor of 3 improvement in most parameters over previous solutions. The planet orbits at a semimajor axis of 9.00.4+0.8AU near the 3:2 resonance with the previously known 6-AU asteroidal belt and is aligned with the inner warped disk. The observations give a 4% probability of a transit of the planet in late 2017.
机译:双子座行星成像仪是专门用于直接成像和光谱表征太阳系外行星的专用设备。它结合了一个非常高级的自适应光学系统,一个抑制衍射的日冕仪和一个具有低光谱分辨率但具有高空间分辨率的积分场光谱仪。对Gemini Planet Imager的各个方面进行了调整,以最大程度地提高对明亮恒星附近微弱行星的敏感性。在第一次观察中,我们估计H波段的Strehl比为0.89,在0.75弧秒时达到10 6 的5-σ对比度,在0.35弧秒时达到10 5 。对Beta Pictoris的观察清楚地以最小的后处理时间在60秒内一次探测到行星Beta Pictoris b。在距离434±6毫秒(质量)和211.8±0.5°的位置角处观察到Beta Pictoris b。使用新位置和先前的天文测量法拟合Beta Pic b的开普勒轨道,与以前的解决方案相比,大多数参数提高了3倍。行星在 9.0 0.4 + 0.8 AU 与先前的3:2共振接近已知的6-AU小行星带,并与内部翘曲盘对齐。观测结果显示,2017年末行星过境的概率为4%。

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号