arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.11655astro-ph.EPastro-ph.SR
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SCExAO/CHARIS 34700 A原行星盘螺旋和变暗特征的高对比度成像

SCExAO/CHARIS High-Contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk

Taichi Uyama, Thayne Currie, Valentin Christiaens, Jaehan Bae, Takayuki Muto, Sanemichi Z. Takahashi, Ryo Tazaki, Marie Ygouf, Jeremy N. Kasdin, Tyler Groff, Ti… 展开作者

Taichi Uyama, Thayne Currie, Valentin Christiaens, Jaehan Bae, Takayuki Muto, Sanemichi Z. Takahashi, Ryo Tazaki, Marie Ygouf, Jeremy N. Kasdin, Tyler Groff, Timothy D. 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 R. Knapp, Jungmi Kwon, Michael Sitko, Michihiro Takami, Kevin R. Wagner, John P. Wisniewski, Yi Yang

摘要:

我们提出了Subaru/SCExAO+CHARIS宽带($JHK$ -波段)积分场光谱的HD 34700 A. CHARIS数据恢复了HD 34700 A的盘环,并证实了Monnier等人(2019)发现的多个螺旋。我们对$\sim12\ M_{\rm Jup}$在$0\farcs3$(环隙内)和$\sim5\ M_{\rm Jup}$在$0\farcs75$(环外)的亚恒星伴星设定了限制。这些数据揭示了环和螺旋上的暗化效应,尽管我们没有确定每个特征的来源,例如与外部螺旋相关的阴影或物理特征。从表面亮度转换的几何平均值表明,在$\sim45^\circ$和$90^\circ$之间的位置角处有较高的尺度高度和/或显著丰富的亚微米尘埃。螺旋拟合导致了非常大的俯仰角($\sim30-50^\circ$),HD 34700 B的恒星飞掠或从可能的包层坠落可能是解释大俯仰角的合理方案。

英文摘要:

We present Subaru/SCExAO+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 in Monnier et al. (2019). We set limits on substellar companions of $\sim12\ M_{\rm Jup}$ at $0\farcs3$ (in the ring gap) and $\sim5\ M_{\rm Jup}$ at $0\farcs75$ (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 albedoes converted from the surface brightness suggests a higher scale height and/or prominently abundant sub-micron dust at position angle between $\sim45^\circ$ and $90^\circ$. Spiral fitting resulted in very large pitch angles ($\sim30-50^\circ$) and a stellar flyby of HD 34700 B or infall from a possible envelope is perhaps a reasonable scenario to explain the large pitch angles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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