First Optical Images of Circumstellar Dust Surrounding the Debris Disk Candidate HD 32297
First Optical Images of Circumstellar Dust Surrounding the Debris Disk Candidate HD 32297
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候选碎片盘 HD 32297 周围星周尘埃的首张光学图像
DOI：
10.1086/499400
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
P. Kalas
中科院分区：
文献类型：
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作者：
P. Kalas
最近，哈勃太空望远镜的近红外成像显示，A星HD 32297周围有一个恒星周围的尘埃盘。在400AU半径范围内可探测到尘埃散射光，其线形形态与圆盘与边缘方向成10°的方向一致。在这里，我们提供了第一批光学图像，显示了从560到1680 AU半径范围内的尘埃散射光形态。假定的圆盘中面位置角偏离了~31°，尘埃散射的颜色很可能是蓝色。我们将HD 32297与星际气体墙和金牛座分子云以南的神秘区域联系在一起。我们提出这种极端的不对称性和蓝盘颜色源于HD 32297向南移动时与一团星际物质的碰撞，并讨论了与30Myr或更年轻的年龄一致的证据。
Near-infrared imaging with the Hubble Space Telescope recently revealed a circumstellar dust disk around the A star HD 32297. Dust-scattered light is detected as far as 400 AU radius, and the linear morphology is consistent with a disk ~10° away from an edge-on orientation. Here we present the first optical images that show the dust-scattered light morphology from 560 to 1680 AU radius. The position angle of the putative disk midplane diverges by ~31°, and the color of dust scattering is most likely blue. We associate HD 32297 with a wall of interstellar gas and the enigmatic region south of the Taurus molecular cloud. We propose that the extreme asymmetries and blue disk color originate from a collision with a clump of interstellar material as HD 32297 moves southward, and discuss evidence consistent with an age of 30 Myr or younger.