普朗克早期结果XXIV：弥漫星际介质和银河系晕中的尘埃
星系天体物理
2015-05-27 v2
摘要
本文介绍了将普朗克和IRAS数据与绿岸望远镜在14个覆盖超过800平方度的高银纬区域的21厘米观测进行比较的初步结果。对于平均HI柱密度低于2 x 10^20 cm^-2的区域，银河系尘埃发射与21厘米发射相关性良好。这些区域中，在移除与HI相关的发射后的残余发射，与宇宙红外背景涨落的预期统计性质一致。柱密度较大的区域显示出相对于HI柱密度的显著过量尘埃发射。过量区域位于有组织的结构中，表明存在分子形式的氢，尽管它们并不总是与CO发射相关。中速云的尘埃发射被高显著性探测到。其光谱性质与局部ISM值相比，表现为显著更热的尘埃(T~20 K)、更低的亚毫米尘埃不透明度，以及非常小颗粒与大颗粒的相对丰度高出约四倍。这些结果与作为银河系喷泉一部分的云的预期相符，其中存在尘埃破碎和碎裂。高速云中的相关尘埃发射未被探测到；在857和3000 GHz处，发射率的99.9%置信度上限平均值是局部ISM值的0.15倍，这与这些云中较低金属丰度和耗损的气相证据一致。在局部ISM和IVC中，识别出尘埃温度和每个H原子发射截面的意外反相关变化，这种趋势延续到分子环境中。这表明通过聚集实现的尘埃生长，在分子云中可见，在云凝聚和恒星形成过程中要活跃得多。
引用
@article{arxiv.1101.2036,
title = {Planck Early Results XXIV: Dust in the diffuse interstellar medium and the Galactic halo},
author = {Planck Collaboration and A. Abergel and P. A. R. Ade and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A. Balbi and A. J. Banday and R. B. Barreiro and J. G. Bartlett and E. Battaner and K. Benabed and A. Benoit and J. -P. Bernard and M. Bersanelli and R. Bhatia and K. Blagrave and J. J. Bock and A. Bonaldi and J. R. Bond and J. Borrill and F. R. Bouchet and F. Boulanger and M. Bucher and C. Burigana and P. Cabella and C. M. Cantalupo and J. -F. Cardoso and A. Catalano and L. Cayon and A. Challinor and A. Chamballu and L. -Y Chiang and C. Chiang and P. R. Christensen and D. L. Clements and S. Colombi and F. Couchot and A. Coulais and B. P. Crill and F. Cuttaia and L. Danese and R. D. Davies and R. J. Davis and P. de Bernardis and G. de Gasperis and A. de Rosa and G. de Zotti and J. Delabrouille and J. -M. Delouis and F. -X. Desert and C. Dickinson and S. Donzelli and O. Dore and U. Dorl and M. Douspis and X. Dupac and G. Efstathiou and T. A. Ensslin and H. K. Eriksen and F. Finelli and O. Forni and M. Frailis and E. Franceschi and S. Galeotta and K. Ganga and M. Giard and G. Giardino and Y. Giraud-Heraud and J. Gonzalez-Nuevo and K. M. Gorski and S. Gratton and A. Gregorio and A. Gruppuso and F. K. Hansen and D. Harrison and G. Helou and S. Henrot-Versille and D. Herranz and S. R. Hildebrandt and E. Hivon and M. Hobson and W. A. Holmes and W. Hovest and R. J. Hoyland and K. M. Huffenberger and A. H. Jaffe and G. Joncas and A. Jones and W. C. Jones and M. Juvela and E. Keihanen and R. Keskitalo and T. S. Kisner and R. Kneissl and L. Knox and H. Kurki-Suonio and G. Lagache and J. -M. Lamarre and A. Lasenby and R. J. Laureijs and C. R. Lawrence and S. Leach and R. Leonardi and C. Leroy and M. Linden-Vornle and F. J. Lockman and M. Lopez-Caniego and P. M. Lubin and J. F. Macias-Perez and C. J. MacTavish and B. Maffei and D. Maino and N. Mandolesi and R. Mann and M. Maris and D. J. Marshall and P. Martin and E. Martinez-Gonzalez and S. Masi and S. Matarrese and F. Matthai and P. Mazzotta and P. McGehee and P. R. Meinhold and A. Melchiorri and L. Mendes and A. Mennella and M. -A. Miville-Deschenes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and A. Murphy and P. Naselsky and F. Nati and P. Natoli and C. B. Netterfield and H. U. Norgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and I. J. O'Dwyer and S. Osborne and F. Pajot and R. Paladini and F. Pasian and G. Patanchon and O. Perdereau and L. Perotto and F. Perrotta and F. Piacentini and M. Piat and D. Pinheiro Goncalves and S. Plaszczynski and E. Pointecouteau and G. Polenta and N. Ponthieu and T. Poutanen and G. Prezeau and S. Prunet and J. -L. Puget and J. P. Rachen and W. T. Reach and M. Reinecke and C. Renault and S. Ricciardi and T. Riller and I. Ristorcelli and G. Rocha and C. Rosset and M. Rowan-Robinson and J. A. Rubino-Martin and B. Rusholme and M. Sandri and D. Santos and G. Savini and D. Scott and M. D. Seiffert and P. Shellard and G. F. Smoot and J. -L. Starck and F. Stivoli and V. Stolyarov and R. Stompor and R. Sudiwala and J. -F. Sygnet and J. A. Tauber and L. Terenzi and L. Toffolatti and M. Tomasi and J. -P. Torre and M. Tristram and J. Tuovinen and G. Umana and L. Valenziano and P. Vielva and F. Villa and N. Vittorio and L. A. Wade and B. D. Wandelt and A. Wilkinson and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1101.2036},
year = {2015}
}
备注
30 pages, 22 figures, accepted for publication in A&A as a special issue for Planck early papers