Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
复制标题
GPI 和 MagAO 揭示 HD 100546 过渡盘中的复杂螺旋结构
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发表时间：
2017
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通讯作者：
S. Wolff
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作者：
K. Follette;K. Follette;J. Rameau;R. Dong;L. Pueyo;L. Close;G. Duchêne;J. Fung;Clare Leonard;B. Macintosh;J. Males;C. Marois;C. Marois;M. Millar;K. Morzinski;Wyatt Mullen;M. Perrin;Elijah Spiro;Jason J. Wang;S. Ammons;V. Bailey;T. Barman;J. Bulger;J. Chilcote;T. Cotten;R. J. Rosa;R. Doyon;M. Fitzgerald;S. Goodsell;J. Graham;A. Greenbaum;P. Hibon;L. Hung;P. Ingraham;P. Kalas;P. Kalas;Q. Konopacky;J. Larkin;J. Maire;F. Marchis;S. Metchev;E. Nielsen;E. Nielsen;R. Oppenheimer;D. Palmer;J. Patience;L. Poyneer;A. Rajan;F. Rantakyrö;D. Savransky;A. Schneider;A. Sivaramakrishnan;I. Song;R. Soummer;Sandrine Thomas;David Vega;J. Wallace;K. Ward;S. Wiktorowicz;S. Wolff
我们目前的过渡盘HD 100546的光学和近红外高对比度图像与麦哲伦自适应光学系统（MagAO）和双子座行星成像仪（GPI）。GPI数据包括偏振强度和总强度图像，MagAO数据在Hα下以同步差分成像模式拍摄。新的GPI H波段总强度数据代表了显着增强灵敏度和字段旋转相比，以前的数据集，并使详细的探索子结构的磁盘。数据处理与各种不同的成像技术（偏振，角度，参考，并同时差分成像），试图确定跨波长，处理技术和算法参数是最一致的磁盘结构。在15 Au的内部磁盘腔是清楚地解决在多个数据集，是各种螺旋的功能。虽然根据几种算法和一系列算法参数，在与圆盘相邻区域明显不同的水平上识别出空腔和螺旋结构，但在HD 100546“c”位置处的发射从激进算法参数下的点状变化到具有保守参数的平滑连续结构，并且与圆盘发射一致。在HD 100546磁盘识别的功能承担定性相似的计算模型的一个适度倾斜的双臂螺旋盘，其中投影效应和缠绕的螺旋臂周围的星星的结果在一些截断的螺旋功能在前向建模图像。
We present optical and near-infrared high-contrast images of the transitional disk HD 100546 taken with the Magellan Adaptive Optics system (MagAO) and the Gemini Planet Imager (GPI). GPI data include both polarized intensity and total intensity imagery, and MagAO data are taken in Simultaneous Differential Imaging mode at Hα. The new GPI H-band total intensity data represent a significant enhancement in sensitivity and field rotation compared to previous data sets and enable a detailed exploration of substructure in the disk. The data are processed with a variety of differential imaging techniques (polarized, angular, reference, and simultaneous differential imaging) in an attempt to identify the disk structures that are most consistent across wavelengths, processing techniques, and algorithmic parameters. The inner disk cavity at 15 au is clearly resolved in multiple data sets, as are a variety of spiral features. While the cavity and spiral structures are identified at levels significantly distinct from the neighboring regions of the disk under several algorithms and with a range of algorithmic parameters, emission at the location of HD 100546 “c” varies from point-like under aggressive algorithmic parameters to a smooth continuous structure with conservative parameters, and is consistent with disk emission. Features identified in the HD 100546 disk bear qualitative similarity to computational models of a moderately inclined two-armed spiral disk, where projection effects and wrapping of the spiral arms around the star result in a number of truncated spiral features in forward-modeled images.