Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
Abstract
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 H{\alpha}. 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 datasets, 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 HD100546 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.
Keywords
Cite
@article{arxiv.1704.06260,
title = {Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO},
author = {Katherine B. Follette and Julien Rameau and Ruobing Dong and Laurent Pueyo and Laird M. Close and Gaspard Duchene and Jeffrey Fung and Clare Leonard and Bruce Macintosh and Jared R. Males and Christian Marois and Maxwell A. Millar-Blanchaer and Katie M. Morzinski and Wyatt Mullen and Marshall Perrin and Elijah Spiro and Jason Wang and S. Mark Ammons and Vanessa P. Bailey and Travis Barman and Joanna Bulger and Jeffrey Chilcote and Tara Cotten and Robert J. De Rosa and Rene Doyon and Michael P. Fitzgerald and Stephen J. Goodsell and James R. Graham and Alexandra Z. Greenbaum and Pascale Hibon and Li-Wei Hung and Patrick Ingraham and Paul Kalas and Quinn Konopacky and James E. Larkin and Jerome Maire and Franck Marchis and Stanimir Metchev and Eric L. Nielsen and Rebecca Oppenheimer and David Palmer and Jennifer Patience and Lisa Poyneer and Abhijith Rajan and Fredrik T. Rantakyro and Dmitry Savransky and Adam C. Schneider and Anand Sivaramakrishnan and Inseok Song and Remi Soummer and Sandrine Thomas and David Vega and J. Kent Wallace and Kimberly Ward-Duong and Sloane Wiktorowicz and Schuyler Wolff},
journal= {arXiv preprint arXiv:1704.06260},
year = {2017}
}
Comments
accepted to AJ