تقرير
SCExAO/CHARIS High-contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk
| العنوان: | SCExAO/CHARIS High-contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk |
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| المؤلفون: | Taichi Uyama, Thayne Currie, Valentin Christiaens, Jaehan Bae, Takayuki Muto, Sanemichi Takahashi, Ryo Tazaki, Marie Ygouf, Jeremy Kasdin, Tyler Groff, Timothy Brandt, Jeffrey Chilcote, Masahiko Hayashi, Michael W. McElwain, Olivier Guyon, Julien Lozi, Nemanja Jovanovic, Frantz Martinache, Tomoyuki Kudo, Motohide Tamura, Eiji Akiyama, Charles A. Beichman, Carol A. Grady, Gillian Knapp, Jungmi Kwon, Michael Sitko, Michihiro Takami, Kevin Wagner, John P. Wisniewski, Yi Yang |
| المصدر: | The Astrophysical Journal. 900(2) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Astrophysics, Astronomy |
| الوصف: | We present Subaru/SCExAO+Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) broadband (JHK-band) integral field spectroscopy of HD 34700 A. CHARIS data recover HD 34700 A's disk ring and confirm multiple spirals discovered by Monnier et al. We set limits on substellar companions of ∼12 MJup at 0.″3 (in the ring gap) and ∼5 M(Jup) at 0."75 (outside the ring). The data reveal darkening effects on the ring and spiral, although we do not identify the origin of each feature such as shadows or physical features related to the outer spirals. Geometric albedos converted from the surface brightness suggest a greater scale height and/or prominently abundant submicron dust at position angles between ∼45° and 90°. Spiral fitting resulted in very large pitch angles (∼30°–50°); a stellar flyby of HD 34700 B or infall from a possible envelope is perhaps a reasonable scenario to explain the large pitch angles. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1538-4357 0004-637X |
| DOI: | 10.3847/1538-4357/aba8f6 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20210011171 |
| ملاحظات: | 411672.04.02 80NSSC20K0252 NNX17AF88G JSPS KAKENHI 19K14764 MEXT/JSPS KAKENHI 18H05442 MEXT/JSPS KAKENHI 15H02063 MEXT/JSPS KAKENHI 22000005 MEXT/JSPS KAKENHI 17K05399 JSPS 23340051 JSPS 26220704 JSPS 23103002 |
| رقم الأكسشن: | edsnas.20210011171 |
| قاعدة البيانات: | NASA Technical Reports |
| تدمد: | 15384357 0004637X |
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| DOI: | 10.3847/1538-4357/aba8f6 |