赫歇尔PACS和SPIRE拍摄的{\beta} Pictoris盘图像
太阳与恒星天体物理
2015-05-19 v1
摘要
我们获得了A5V星{\beta} Pic周围碎片盘热辐射的赫歇尔PACS和SPIRE图像。该盘在70、100和160{\mu}m的PACS滤光片中得到了良好分辨。70至160{\mu}m的表面亮度轮廓沿盘方向没有显著不对称性，且与70至160{\mu}m之间90%的辐射来自距恒星200 AU以内区域的特征相符。尽管SPIRE 250-500{\mu}m滤光片获得的图像仅能勉强分辨碎片盘，但它们提供了全盘测光数据，完成了先前无法获得的几个波长倍频程上的光谱能量分布。较小的远红外光谱指数({\beta} = 0.34)表明，内盘(<200 AU)中的尘埃粒度分布与局部碰撞平衡不一致。粒度分布要么受到非平衡效应的影响，要么呈现出波动模式，这是由于辐射压力移除了撞击体而导致其丰度不足所致。
引用
@article{arxiv.1005.3915,
title = {The {\beta} Pictoris disk imaged by Herschel PACS and SPIRE},
author = {B. Vandenbussche and B. Sibthorpe and B. Acke and E. Pantin and G. Olofsson and C. Waelkens and C. Dominik and M. J. Barlow and J. A. D. L. Blommaert and J. Bouwman and A. Brandeker and M. Cohen and W. DeMeester and W. R. F. Dent and K. Exter and J. Di Francesco and M. Fridlund and W. K. Gear and A. M. Glauser and H. L. Gomez and J. S. Greaves and P. C. Hargrave and P. M. Harvey and Th. Henning and A. M. Heras and M. R. Hogerheijde and W. S. Holland and R. Huygen and R. J. Ivison and C. Jean and S. J. Leeks and T. L. Lim and R. Liseau and B. C. Matthews and D. A. Naylor and G. L. Pilbratt and E. T. Polehampton and S. Regibo and P. Royer and A. Sicilia-Aguilar and B. M. Swinyard and H. J. Walker and R. Wesson},
journal= {arXiv preprint arXiv:1005.3915},
year = {2015}
}
备注
Accepted for publication in Astronomy&Astrophysics, Herschel First Results special issue