论文标题
SCEXAO/CHARIS高对比度的螺旋形成像和HD 34700中的黑暗特征A Protoplanetary磁盘
SCExAO/CHARIS High-Contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk
论文作者
论文摘要
我们提出了Subaru/scexao+Charis宽带（$ JHK $ -BAND）HD 34700 A. CHARIS数据恢复HD 34700 A的磁盘环，并确认Monnier等人发现的多个螺旋形。 （2019）。我们将$ \ sim12 \ m _ {\ rm jup} $的替代伴侣设置为$ 0 \ farcs3 $（在环隙中）和$ \ sim5 \ m _ {\ rm jup} $ $ 0 \ farcs75 $（在环外）。数据揭示了对环和螺旋的影响，尽管我们没有确定每个功能的起源，例如阴影或与外螺旋相关的物理特征。从表面亮度转换的几何反照率表明，在$ \ sim45^\ circ $和$ 90^\ circ $之间的位置角度上的尺度高度和/或突出的次数灰尘。螺旋拟合导致非常大的音高角度（$ \ sim30-50^\ circ $）和HD 34700 B的恒星飞行或从可能的信封中输入的恒星飞行可能是一个合理的场景，可以解释较大的音高角度。
We present Subaru/SCExAO+CHARIS broadband ($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.
