PROBING FOR EXOPLANETS HIDING IN DUSTY DEBRIS DISKS: DISK IMAGING, CHARACTERIZATION, AND EXPLORATION WITH HST/STIS MULTI-ROLL CORONAGRAPHY
PROBING FOR EXOPLANETS HIDING IN DUSTY DEBRIS DISKS: DISK IMAGING, CHARACTERIZATION, AND EXPLORATION WITH HST/STIS MULTI-ROLL CORONAGRAPHY
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探测隐藏在尘埃碎片盘中的系外行星：使用 HST/STIS 多辊日冕仪进行盘成像、表征和探索
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Rodigas
中科院分区：
文献类型：
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作者：
G. Schneider;C. Grady;D. Hines;Christopher C. Stark;J. Debes;J. Carson;Marc J. Kuchner;M. Perrin;A. J. Weinberger;J. Wisniewski;M. Silverstone;H. Jang;T. Henning;B. Woodgate;E. Serabyn;A. Moro;Motohide Tamura;Phillip M. Hinz;T. Rodigas
系外行星系统中星周碎片的空间分辨散射光图像限制了这些系统中尘埃粒子的物理性质和轨道。它们还提供了共轨（但看不见的）行星、系统结构和干扰星光散射的星周物质的力量的信息。利用哈勃太空望远镜(HST)/太空望远镜成像光谱仪（STIS）宽带光学日冕仪，我们完成了一个项目的观测阶段，研究了10个星周碎片系统和1个“成熟”原行星盘的空间分布，这些样本都具有HST谱系，使用点扩展函数减法多卷日冕仪。这些观测探测了最近系统的小于5 AU的恒星中心距离，同时解析了远远超出我们太阳系内巨行星和柯伊伯带区域对应的磁盘亚结构。它们还揭示了在较大的恒星中心距离上弥漫性的非常低表面亮度的尘埃。在这里，我们提出了新的结果，包括较暗的圆盘，如HD 92945 (Fdisk/Fstar = 5 × 10−5)，证实并更好地揭示了在较大的漫射尘埃盘中存在狭窄的内部碎片环。其他具有环状亚结构、明显不对称和复杂形态的圆盘包括HD 181327，我们认为它是最近在外柯伊伯带发生的一次大碰撞产生的喷射物；HD 61005，可能与本地星际介质相互作用；HD 15115和HD 32297，也在假定的环境相互作用的背景下进行了讨论。这些圆盘和HD 15745表明不能孤立地看待碎片系统的演变。对于AU Mic的边缘盘，我们发现在小于5 AU处的面外表面亮度不对称，这可能意味着一个或多个行星摄动者的存在。mpmus原行星盘的时间分辨率图像提供了磁盘照明的空间分辨率时间变动性。这些和其他来自HST/STIS GO/12228项目的新图像可以在我们自己的太阳系背景下直接相互比较这些系外行星碎片系统的结构。
Spatially resolved scattered-light images of circumstellar debris in exoplanetary systems constrain the physical properties and orbits of the dust particles in these systems. They also inform on co-orbiting (but unseen) planets, the systemic architectures, and forces perturbing the starlight-scattering circumstellar material. Using Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) broadband optical coronagraphy, we have completed the observational phase of a program to study the spatial distribution of dust in a sample of 10 circumstellar debris systems and 1 “mature” protoplanetrary disk, all with HST pedigree, using point-spread-function-subtracted multi-roll coronagraphy. These observations probe stellocentric distances ⩾5 AU for the nearest systems, and simultaneously resolve disk substructures well beyond corresponding to the giant planet and Kuiper Belt regions within our own solar system. They also disclose diffuse very low-surface-brightness dust at larger stellocentric distances. Herein we present new results inclusive of fainter disks such as HD 92945 (Fdisk/Fstar = 5 × 10−5), confirming, and better revealing, the existence of a narrow inner debris ring within a larger diffuse dust disk. Other disks with ring-like substructures and significant asymmetries and complex morphologies include HD 181327, for which we posit a spray of ejecta from a recent massive collision in an exo-Kuiper Belt; HD 61005, suggested to be interacting with the local interstellar medium; and HD 15115 and HD 32297, also discussed in the context of putative environmental interactions. These disks and HD 15745 suggest that debris system evolution cannot be treated in isolation. For AU Mic's edge-on disk, we find out-of-plane surface brightness asymmetries at ⩾5 AU that may implicate the existence of one or more planetary perturbers. Time-resolved images of the MP Mus protoplanetary disk provide spatially resolved temporal variability in the disk illumination. These and other new images from our HST/STIS GO/12228 program enable direct inter-comparison of the architectures of these exoplanetary debris systems in the context of our own solar system.
观察碎片盘中的行星盘相互作用
影响因子：
6.5
作者：
S. Ertel;S. Wolf;J. Rodmann
通讯作者：
J. Rodmann
影响因子：
3.2
作者：
V. Mannings;A. Boss;S. Russell
通讯作者：
V. Mannings;A. Boss;S. Russell