利用赫歇尔-SPIRE 光谱探测 M82 的分子星际介质
宇宙学与河外天体物理
2015-05-18 v1
摘要
我们展示了用赫歇尔 SPIRE 傅里叶变换光谱仪对星暴星系 M82 的观测结果。光谱（194-671 {\mu}m）显示了由 M82 中心区域发射的从 J = 4-3 到 13-12 的显著 CO 转动阶梯谱线。首次观测到的高 J 谱线很好地约束了气体的基本性质。对这些高信噪比的 12CO 和 13CO 谱线进行的辐射传输建模强烈表明存在一个温度约 500 K、压力约 3x10^6 K cm^-3 的非常温暖的分子气体成分，这与斯皮策和 ISO 的 H_2 转动谱线测量结果非常吻合。我们认为这种温暖气体是由星际介质（ISM）中湍流的耗散加热的，而非来自星暴的 X 射线或紫外通量。本文展示了 SPIRE FTS 在研究邻近星系星际介质方面的前景。
引用
@article{arxiv.1005.1877,
title = {Probing the molecular interstellar medium of M82 with Herschel-SPIRE spectroscopy},
author = {P. Panuzzo and N. Rangwala and A. Rykala and K. G. Isaak and J. Glenn and C. D. Wilson 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-Rodríguez 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 T. Fulton and M. Galametz and F. Galliano and W. K. Gear and H. L. Gomez and M. Griffin and S. Hony and L. R. Levenson and N. Lu and S. Madden and B. O'Halloran and K. Okumura and S. Oliver and M. J. Page and A. Papageorgiou and T. J. Parkin and I. Pérez-Fournon and M. Pohlen and E. T. Polehampton and E. E. Rigby and H. Roussel and N. Sacchi and M. Sauvage 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 B. Swinyard and M. Trichas and M. Vaccari and L. Vigroux and H. Wozniak and G. S. Wright and W. W. Zeilinger},
journal= {arXiv preprint arXiv:1005.1877},
year = {2015}
}
备注
5 pages, 4 figures, Accepted for publication on the A&A Herschel Special Issue