云、纤维结构与原恒星：赫歇尔Hi-GAL银河系巡天
星系天体物理
2015-05-19 v1
摘要
我们展示了Hi-GAL巡天科学验证阶段的首批结果，这是赫歇尔空间望远镜的关键项目，将在5个波段绘制银河系内银道面。我们概述了数据缩减策略，并展示了在l=30°和l=59°附近观测的两个2°×2°天区的科学亮点。这两个区域富含强烈且高度结构化的延展辐射，呈现出广泛的纤维状组织。可以为这两个天区中的数百个天体构建源SED，并对其中的相当一部分（可估计距离）提取物理参数。我们发现，大部分致密源（下文称为“核”）与纤维结构相关联，并且与纤维本身局部波束平均柱密度的关系表明，在l=59°天区，当A_V超过约1的阈值时，核似乎出现；对于l=30°天区，A_V值在5到10之间，这可能是由于源的距离相对较大。这描绘了一个令人兴奋的场景：弥散云首先坍缩成纤维，随后纤维在柱密度达到临界水平的地方碎裂成核。尽管许多源的核L/M比远大于几，我们发现核的表面密度在0.03到0.5 g cm⁻²之间。我们的结果与最近关于纤维由大尺度汇聚流形成的MHD数值模拟结果吻合良好。
引用
@article{arxiv.1005.3317,
title = {Clouds, filaments and protostars: the Herschel Hi-GAL Milky Way},
author = {S. Molinari and B. Swinyard and J. Bally and M. Barlow and J. P. Bernard and P. Martin and T. Moore and A. Noriega-Crespo and R. Plume and L. Testi and A. Zavagno and A. Abergel and B. Ali and L. Anderson and P. André and J. P. Baluteau and C. Battersby and M. T. Beltrán and M. Benedettini and N. Billot and J. Blommaert and S. Bontemps and F. Boulanger and J. Brand and C. Brunt and M. Burton and L. Calzoletti and S. Carey and P. Caselli and R. Cesaroni and J. Cernicharo and S. Chakrabarti and A. Chrysostomou and M. Cohen and M. Compiegne and P. de Bernardis and G. de Gasperis and A. M. di Giorgio and D. Elia and F. Faustini and N. Flagey and Y. Fukui and G. A. Fuller and K. Ganga and P. Garcia-Lario and J. Glenn and P. F. Goldsmith and M. J. Griffin and M. Hoare and M. Huang and D. Ikhenaode and C. Joblin and G. Joncas and M. Juvela and J. M. Kirk and G. Lagache and J. Z. Li and T. L. Lim and S. D. Lord and M. Marengo and D. J. Marshall and S. Masi and F. Massi and M. Matsuura and V. Minier and M. A. Miville-Deschenes and L. A. Montier and L. Morgan and F. Motte and J. C. Mottram and T. G. Mueller and P. Natoli and J. Neves and L. Olmi and R. Paladini and D. Paradis and H. Parsons and N. Peretto and M. Pestalozzi and S. Pezzuto and F. Piacentini and L. Piazzo and D. Polychroni and M. Pomarès and C. C. Popescu and W. T. Reach and I. Ristorcelli and J. F. Robitaille and T. Robitaille and J. A. Rodón and A. Roy and P. Royer and D. Russeil and P. Saraceno and M. Sauvage and P. Schilke and E. Schisano and N. Schneider and F. Schuller and B. Schulz and B. Sibthorpe and H. A. Smith and M. D. Smith and L. Spinoglio and D. Stamatellos and F. Strafella and G. S. Stringfellow and E. Sturm and R. Taylor and M. A. Thompson and A. Traficante and R. J. Tuffs and G. Umana and L. Valenziano and R. Vavrek and M. Veneziani and S. Viti and C. Waelkens and D. Ward-Thompson and G. White and L. A. Wilcock and F. Wyrowski and H. W. Yorke and Q. Zhang},
journal= {arXiv preprint arXiv:1005.3317},
year = {2015}
}
备注
A&A, accepted