SF-06-0004

ALMA Super-resolution Imaging of Star- and Planet-forming Regions Using Sparse Modeling

Ayumu Shoshi, Masayuki Yamaguchi, Kazuki Tokuda, Asako Sato, Naoto Harada, Takeshi Nakazato, Takashi Tsukagoshi, Masahiro N Machida, Shiro Ikeda

An image synthesis method based on Sparse Modeling (SpM) has recently produced images with about three times higher spatial resolution than those obtained by conventional CLEAN and detected new structures in protoplanetary disks (Yamaguchi et al. 2021). Demands for studies that perform similar analyses on ALMA archival data are rapidly increasing. However, there has not been a broad parameter survey of various ALMA observation data. Here, we focused on the objects in the Ophiuchus star- and planet-forming regions. We created SpM images with lower resolution (~0.50 arcsec) data and investigated the performance of whether SpM can achieve higher resolution and fidelity images. As a result, for the compact objects comparable with the CLEAN beam size, SpM can reconstruct the high-fidelity images with three times the higher spatial resolution (100 mas). For molecular clouds, SpM achieved spatial resolution as good as CLEAN and reconstructed images with high fidelity.