M82的SPIRE成像：星风与潮汐流中的冷尘埃
宇宙学与河外天体物理
2015-05-18 v1
摘要
M82是赫歇尔近邻星系巡天中一类独特星暴超星系风星系的代表。此外，它与M81星群的相互作用已从其盘面剥离了相当一部分星际介质。SPIRE图像现在能够更好地表征盘外冷尘埃的远红外辐射，并描绘出比以往更完整的质量分布和能量图景。图像显示，远红外辐射在投影上与星暴星风以及一个巨大的晕区重合，其延展程度远超斯皮策望远镜观测到的多环芳烃波段辐射。一些复杂的子结构与最亮的多环芳烃纤维结构重合，另一些则与原子氢中观测到的潮汐流重合。我们从图像中减去了星暴和下方盘面的远红外辐射，得到了星风和晕区的空间分辨远红外颜色。我们根据尘埃质量、尘埃温度和全局物理条件对结果进行了解释。特别地，我们考察了尘埃物理性质随距星系中心和星风极轴距离的变化，并得出结论：超过三分之二的盘外尘埃是通过潮汐相互作用被剥离的，而非被星暴星风所裹挟。
引用
@article{arxiv.1005.1526,
title = {SPIRE imaging of M82: cool dust in the wind and tidal streams},
author = {H. Roussel and C. D. Wilson and L. Vigroux and K. G. Isaak and M. Sauvage and S. C. Madden and R. Auld and M. Baes and M. J. Barlow and G. J. Bendo and J. J. Bock and A. Boselli and M. Bradford and V. Buat and N. Castro-Rodriguez and P. Chanial and S. Charlot and L. Ciesla and D. L. Clements and A. Cooray and D. Cormier and L. Cortese and J. I. Davies and E. Dwek and S. A. Eales and D. Elbaz and M. Galametz and F. Galliano and W. K. Gear and J. Glenn and H. L. Gomez and M. Griffin and S. Hony and L. R. Levenson and N. Lu and B. O'Halloran and K. Okumura and S. Oliver and M. J. Page and P. Panuzzo and A. Papageorgiou and T. J. Parkin and I. Perez-Fournon and M. Pohlen and N. Rangwala and E. E. Rigby and A. Rykala and N. Sacchi and B. Schulz and M. R. P. Schirm and M. W. L. Smith and L. Spinoglio and J. A. Stevens and S. Srinivasan and M. Symeonidis and M. Trichas and M. Vaccari and H. Wozniak and G. S. Wright and W. W. Zeilinger},
journal= {arXiv preprint arXiv:1005.1526},
year = {2015}
}
备注
accepted in A&A Herschel special issue