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A Tail Structure Associated with a Protoplanetary Disk around SU Aurigae
| Title: | A Tail Structure Associated with a Protoplanetary Disk around SU Aurigae |
| Authors: | Akiyama, Eiji Browse this author →KAKEN DB | | Vorobyov, Eduard I. Browse this author | | Liu, Hauyu Baobabu Browse this author | | Dong, Ruobing Browse this author | | de Leon, Jerome Browse this author | | Liu, Sheng-Yuan Browse this author | | Tamura, Motohide Browse this author →KAKEN DB |
| Keywords: | planetary systems | | stars: individual (SU Aur) | | stars: pre-main sequence | | techniques: interferometric |
| Issue Date: | 4-Apr-2019 |
| Publisher: | IOP Publishing |
| Journal Title: | The Astronomical journal |
| Volume: | 157 |
| Issue: | 4 |
| Start Page: | 165 |
| Publisher DOI: | 10.3847/1538-3881/ab0ae4 |
| Abstract: | We present Atacama Large Millimeter/submillimeter Array observations of the CO (J = 2 - 1) line emission from a protoplanetary disk around T-Tauri star SU Aurigae (hereafter SU Aur). Previous observations in optical and near-infrared wavelengths find a unique structure in SU Aur. One of the highlights of the observational results is that an extended tail-like structure is associated with the disk, indicating mass transfer from or into the disk. Here we report the discovery of the counterpart of the tail-like structure in CO gas extending more than 1000 au long. Based on geometric and kinematic perspectives, both of the disk and the tail-like structure components physically connect to each other. Several theoretical studies predicted the observed tail-like structure via the following possible scenarios: (1) a gaseous stream from the molecular cloud remnant, (2) collision with a (sub)stellar intruder or a gaseous blob from the ambient cloud, and (3) ejection of a planetary or brown dwarf mass object due to gravitational instability via multibody gravitational interaction. Since the tail-like structures associated with the SU Aur disk are a new example following RW Aurigae, some disks may experience the internal or external interaction and drastically lose mass during disk evolution. |
| Rights: | This is an author-created, un-copyedited version of an article accepted for publication in The Astronomical journal. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.3847/1538-3881/ab0ae4. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/77312 |
| Appears in Collections: | 高等教育推進機構 (Institute for the Advancement of Higher Education) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 秋山 永治
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