Planck 中期结果 XV：银河系云中反常微波发射的研究
星系天体物理
2018-02-21 v2
摘要
反常微波发射 (AME) 被认为源于微小旋转尘埃颗粒的电偶极辐射。本文旨在对 AME 区域的基本性质及其发射环境进行统计研究。我们利用 WMAP 和 Planck 星图，结合辅助射电和红外数据，构建了包含 98 个候选 AME 源的样本，并通过对 0.408 GHz 至 3000 GHz 范围内 1 度平滑星图进行孔径测光，为每个源构建了光谱能量分布 (SED)。每个光谱均拟合了一个包含自由 - 自由辐射、同步辐射（必要时）、宇宙微波背景 (CMB)、热尘埃和旋转尘埃成分的简单模型。我们发现，在 98 个源中，有 42 个在 20 至 60 GHz 频率范围内表现出显著 (>5sigma) 的超额发射。利用红外颜色判据分析来自超致密 HII 区的光厚自由 - 自由发射的潜在贡献后，显著 AME 样本减少至 27 个区域。AME 的光谱与旋转尘埃模型光谱一致。AME 区域在空间上往往比几乎没有或没有 AME 的区域更为延展。AME 强度与亚毫米/红外流量密度 strongly 相关，并与文献中此前的 AME 探测结果相当。AME 发射率（定义为 AME 与尘埃光深之比）在 AME 区域间变化达一个数量级。AME 区域倾向于与 14-20 K 范围内的较冷尘埃相关联，平均发射率指数为 +1.8，而非 AME 区域通常较暖，温度为 20-27 K。与以往研究一致，AME 发射率似乎随柱密度增加而降低。目前的图景表明，大部分 AME 源自较冷中性星际介质相中的多环芳烃和微小尘埃颗粒（摘要略）。
引用
@article{arxiv.1309.1357,
title = {Planck intermediate results. XV. A study of anomalous microwave emission in Galactic clouds},
author = {Planck Collaboration and P. A. R. Ade and N. Aghanim and M. I. R. Alves and M. Arnaud and F. Atrio-Barandela and J. Aumont and C. Baccigalupi and A. J. Banday and R. B. Barreiro and E. Battaner and K. Benabed and A. Benoit-Lévy and J. -P. Bernard and M. Bersanelli and P. Bielewicz and J. Bobin and A. Bonaldi and J. R. Bond and J. Borrill and F. R. Bouchet and F. Boulanger and C. Burigana and J. -F. Cardoso and S. Casassus and A. Catalano and A. Chamballu and X. Chen and H. C. Chiang and L. -Y Chiang and P. R. Christensen and D. L. Clements and S. Colombi and L. P. L. Colombo and F. Couchot and B. P. Crill and F. Cuttaia and L. Danese and R. D. Davies and R. J. Davis and P. de Bernardis and A. de Rosa and G. de Zotti and J. Delabrouille and F. -X. Désert and C. Dickinson and J. M. Diego and S. Donzelli and O. Doré and X. Dupac and T. A. Enßlin and H. K. Eriksen and F. Finelli and O. Forni and E. Franceschi and S. Galeotta and K. Ganga and R. T. Génova-Santos and T. Ghosh and M. Giard and J. González-Nuevo and K. M. Górski and A. Gregorio and A. Gruppuso and F. K. Hansen and D. Harrison and G. Helou and C. Hernández-Monteagudo and S. R. Hildebrandt and E. Hivon and A. Hornstrup and A. H. Jaffe and T. R. Jaffe and W. C. Jones and E. Keihänen and R. Keskitalo and R. Kneissl and J. Knoche and M. Kunz and H. Kurki-Suonio and A. Lähteenmäki and J. -M. Lamarre and A. Lasenby and C. R. Lawrence and R. Leonardi and M. Liguori and P. B. Lilje and M. Linden-Vørnle and M. López-Caniego and J. F. Macías-Pérez and B. Maffei and D. Maino and N. Mandolesi and D. J. Marshall and P. G. Martin and E. Martínez-González and S. Masi and M. Massardi and S. Matarrese and P. Mazzotta and P. R. Meinhold and A. Melchiorri and L. Mendes and A. Mennella and M. Migliaccio and M. -A. Miville-Deschênes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and P. Naselsky and F. Nati and P. Natoli and H. U. Nørgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and C. A. Oxborrow and L. Pagano and F. Pajot and R. Paladini and D. Paoletti and G. Patanchon and T. J. Pearson and M. Peel and O. Perdereau and F. Perrotta and F. Piacentini and M. Piat and E. Pierpaoli and D. Pietrobon and S. Plaszczynski and E. Pointecouteau and G. Polenta and N. Ponthieu and L. Popa and G. W. Pratt and S. Prunet and J. -L. Puget and J. P. Rachen and R. Rebolo and W. Reich and M. Reinecke and M. Remazeilles and C. Renault and S. Ricciardi and T. Riller and I. Ristorcelli and G. Rocha and C. Rosset and G. Roudier and J. A. Rubiño-Martín and B. Rusholme and M. Sandri and G. Savini and D. Scott and L. D. Spencer and V. Stolyarov and D. Sutton and A. -S. Suur-Uski and J. -F. Sygnet and J. A. Tauber and D. Tavagnacco and L. Terenzi and C. T. Tibbs and L. Toffolatti and M. Tomasi and M. Tristram and M. Tucci and L. Valenziano and J. Valiviita and B. Van Tent and J. Varis and P. Vielva and F. Villa and B. D. Wandelt and R. Watson and A. Wilkinson and N. Ysard and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1309.1357},
year = {2018}
}
备注
Submitted on behalf of Planck Collaboration by Clive Dickinson. 30 pages, 24 figures, 3 tables Updated to match the accepted version