SCExAO/CHARIS Near-infrared Integral Field Spectroscopy of the HD 15115 Debris Disk,The Astronomical Journal

当前位置： X-MOL 学术 › Astron. J. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

SCExAO/CHARIS Near-infrared Integral Field Spectroscopy of the HD 15115 Debris Disk
The Astronomical Journal ( IF 5.3 ) Pub Date : 2020-09-11 , DOI: 10.3847/1538-3881/ababa6
Kellen Lawson ₁ , Thayne Currie _{2,

3,

4} , John P. Wisniewski ₁ , Motohide Tamura _{5,

6,

7} , Glenn Schneider ₈ , Jean-Charles Augereau ₉ , Timothy D. Brandt ₁₀ , Olivier Guyon _{2,

5,

8,

11} , N. Jeremy Kasdin _{12,

13} , Tyler D. Groff ₁₄ , Julien Lozi ₂ , Jeffrey Chilcote ₁₅ , Klaus Hodapp ₁₆ , Nemanja Jovanovic ₁₇ , Frantz Martinache ₁₈ , Nour Skaf _{2,

19,

20} , Eiji Akiyama ₂₁ , Thomas Henning ₂₂ , Gillian R. Knapp ₂₃ , Jungmi Kwon ₆ , Satoshi Mayama ₂₄ , Michael W. McElwain ₁₄ , Michael L. Sitko ₂₅ , Ruben Asensio-Torres ₂₆ , Taichi Uyama _{7,

27,

28} , Kevin Wagner ₈

Affiliation

Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USA
Subaru Telescope, National Astronomical Observatory of Japan, 650 North A‘ohōkū Place, Hilo, HI 96720, USA
NASA-Ames Research Center, Moffett Boulevard, Moffett Field, CA, USA
Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA, USA
Astrobiology Center of NINS, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588, Japan
Department of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
National Astronomical Observatory of Japan, 2-21-2, Osawa, Mitaka, Tokyo 181-8588, Japan
Steward Observatory, The University of Arizona, Tucson, AZ 85721, USA
Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Department of Physics, University of California, Santa Barbara, Santa Barbara, CA, USA
College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA
College of Arts and Sciences, University of San Francisco, San Francisco, CA, USA
Department of Mechanical Engineering, Princeton University, Princeton, NJ, USA
NASA-Goddard Space Flight Center, Greenbelt, MD, USA
Department of Physics, University of Notre Dame, South Bend, IN, USA
Institute for Astronomy, University of Hawaii, 640 North A‘ohōkū Place, Hilo, HI 96720, USA
Department of Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA
Universit Cte d’Azur, Observatoire de la Cte d’Azur, CNRS, Laboratoire Lagrange, France
LESIA, Observatoire de Paris, Universit PSL, CNRS, Sorbonne Universit, Universit de Paris, 5 place Jules Janssen, F-92195 Meudon, France
Department of Physics and Astronomy, University College London, London, UK
Department of Engineering, Niigata Institute of Technology, 1719 Fujihashi, Kashiwazaki, 945-1195, Japan
Max Planck Institute for Astronomy, Knigstuhl 17, D-69117 Heidelberg, Germany
Department of Astrophysical Science, Princeton University, Peyton Hall, Ivy Lane, Princeton, NJ 08544, USA
The Graduate University for Advanced Studies, SOKENDAI, Shonan Village, Hayama, Miura, Kanagawa 240-0193, Japan
Space Science Institute, 475 Walnut Street, Suite 205, Boulder, CO 80301, USA
Department of Astronomy, Stockholm University, AlbaNova University Center, SE-106 91, Stockholm, Sweden
Infrared Processing and Analysis Center, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA
NASA Exoplanet Science Institute, Pasadena, CA 91125, USA

We present new, near-infrared (1.1−2.4 μm) high-contrast imaging of the debris disk around HD 15115 with the Subaru Coronagraphic Extreme Adaptive Optics system (SCExAO) coupled with the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS). SCExAO/CHARIS resolves the disk down to ρ∼0."2 (r_(proj)∼10 au), a factor of ∼3−5 smaller than previous recent studies. We derive a disk position angle of PA ∼279.∘4−280.∘5 and an inclination of i ∼85.∘3−86.∘2. While recent SPHERE/IRDIS imagery of the system could suggest a significantly misaligned two ring disk geometry, CHARIS imagery does not reveal conclusive evidence for this hypothesis. Moreover, optimizing models of both one and two ring geometries using differential evolution, we find that a single ring having a Hong-like scattering phase function matches the data equally well within the CHARIS field of view (ρ≲1"). The disk's asymmetry, well-evidenced at larger separations, is also recovered; the west side of the disk appears on average around 0.4 magnitudes brighter across the CHARIS bandpass between 0."25 and 1". Comparing STIS/50CCD optical photometry (2000−10500 A) with CHARIS NIR photometry, we find a red (STIS/50CCD−CHARIS broadband) color for both sides of the disk throughout the 0."4−1" region of overlap, in contrast to the blue color reported at similar wavelengths for regions exterior to ∼2". Further, this color may suggest a smaller minimum grain size than previously estimated at larger separations. Finally, we provide constraints on planetary companions, and discuss possible mechanisms for the observed inner disk flux asymmetry and color.

中文翻译：

HD 15115 碎片盘的 SCExAO/CHARIS 近红外积分场光谱

我们使用斯巴鲁 Coronagraphic Extreme Adaptive Optics 系统 (SCExAO) 和 Coronagraphic 高角分辨率成像光谱仪 (CHARIS) 对 HD 15115 周围的碎片盘进行了新的近红外 (1.1-2.4 μm) 高对比度成像。SCExAO/CHARIS 将磁盘解析为 ρ∼0."2 (r_(proj)∼10 au)，比之前最近的研究小 ∼3−5。我们推导出了 PA ∼279.∘4 的磁盘位置角−280.∘5 和 i ∼85.∘3−86.∘2 的倾角。虽然该系统最近的 SPHERE/IRDIS 图像可能表明两个环盘几何结构严重错位，但 CHARIS 图像并未揭示该假设的确凿证据. 此外，使用差分进化优化一环和二环几何模型，我们发现具有类似 Hong 的散射相位函数的单个环与 CHARIS 视场 (ρ≲1") 内的数据同样匹配。圆盘的不对称性在较大的间距下得到了很好的证明，也恢复了；西侧在 0."25 和 1" 之间的 CHARIS 带通范围内，圆盘的亮度平均高出 0.4 个左右。将 STIS/50CCD 光学光度法 (2000-10500 A) 与 CHARIS NIR 光度法进行比较，我们发现红色 (STIS/50CCD-CHARIS)宽带）颜色在整个 0."4-1" 重叠区域的圆盘两侧，与在大约 2" 之外的区域报告的类似波长的蓝色形成对比。此外，这种颜色可能表明比先前在较大分离时估计的最小粒度更小。最后，我们提供了对行星同伴的限制，

更新日期：2020-09-11

点击分享查看原文

点击收藏

阅读更多本刊最新论文

全部期刊列表>>