标题： HD 32297候选恒星周围尘埃盘的首幅光学图像 显示英文标题

标题： First optical images of circumstellar dust surrounding the debris disk candidate HD 32297

摘要： 哈勃太空望远镜的近红外成像最近揭示了围绕A型恒星HD 32297的恒星周尘埃盘。尘埃散射光被探测到最远达400天文单位半径，并且线性形态与一个约10度偏离边缘方向的盘面一致。这里我们展示了首次观测到的光学图像，显示了从560到1680天文单位半径的尘埃散射光形态。据称盘面中平面的位置角相差31度，并且尘埃散射的颜色很可能偏蓝。我们将HD 32297与星际气体壁以及金牛座分子云南部的神秘区域联系起来。我们认为极端不对称性和蓝色盘面颜色起源于HD 32297向南移动时与一团星际物质碰撞，并讨论了支持其年龄为3000万年或更年轻的证据。 显示英文摘要

摘要： 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 degrees 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 degrees 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.