文章基本信息

标题：The Gemini Planet Imager View of the HD 32297 Debris Disk
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作者：Gaspard Duchêne ; Malena Rice ; Justin Hom 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：159
期号：6
页码：3461-3481
DOI：10.3847/1538-3881/ab8881
语种：English
出版社：American Institute of Physics
摘要：We present new H-band scattered light images of the HD 32297 edge-on debris disk obtained with the Gemini Planet Imager.The disk is detected in total and polarized intensity down to a projected angular separation of 0farcs15, or 20 au.On the other hand, the large-scale swept-back halo remains undetected, likely a consequence of its markedly blue color relative to the parent body belt.We analyze the curvature of the disk spine and estimate a radius of ≈100 au for the parent body belt, smaller than past scattered light studies but consistent with thermal emission maps of the system.We employ three different flux-preserving post-processing methods to suppress the residual starlight and evaluate the surface brightness and polarization profile along the disk spine.Unlike past studies of the system, our high-fidelity images reveal the disk to be highly symmetric and devoid of morphological and surface brightness perturbations.We find the dust scattering properties of the system to be consistent with those observed in other debris disks, with the exception of HR 4796.Finally, we find no direct evidence for the presence of a planetary-mass object in the system.
关键词：Debris disks;Circumstellar dust