Planck 中期结果 XXIX：基于 Planck、IRAS 和 WISE 观测的全天尘埃建模
星系天体物理
2016-02-17 v3
摘要
我们利用 Draine 和 Li 于 2007 年提出的物理尘埃模型（DL），对高分辨率的 Planck、IRAS 和 WISE 红外（IR）观测数据进行了全天建模。我们研究了该模型的性能与结果，并讨论了其对未来尘埃建模的启示。本工作将此前利用 Herschel 和 Spitzer 数据对邻近星系进行的 DL 尘埃建模扩展至银河系尘埃辐射。我们采用 DL 尘埃模型生成了尘埃质量面密度、光学消光 Av 以及以 Umin 参数化的星光强度图。DL 模型在大部分天区令人满意地复现了观测到的光谱能量分布（SED），仅在银河系内盘和低黄纬区域存在微小偏差。我们将弥漫星际介质的 DL 光学消光 Av 与斯隆数字巡天（Sloan Digital Sky Survey）中观测到的 2×10^5 个类星体（QSOs）的光学估计值进行了比较。DL 的 Av 估计值比针对 QSOs 确定的值大约高出 2 倍，该倍数取决于 Umin。DL 拟合参数 Umin 有效由 SED 峰值波长决定，似乎不仅追踪了星光强度的变化，还追踪了单位 Av 下尘埃颗粒的远红外不透明度的变化。为克服模型缺陷，我们提出了一种依赖于 Umin 的 DL Av 估计值的经验归一化方法，以补偿与 QSO 观测发现的系统性差异。该归一化方法也使 DL Av 估计值与通过 2 微米全天巡天中恒星近红外颜色导出的分子云结果达成一致。利用 DL 模型和 QSOs 数据，我们将 Planck 和 IRAS 观测中弥漫星际介质的光谱信息压缩为一族 20 个按 Av 归一化并以 Umin 参数化的 SED，可用于检验和经验校准尘埃模型。
引用
@article{arxiv.1409.2495,
title = {Planck intermediate results. XXIX. All-sky dust modelling with Planck, IRAS, and WISE observations},
author = {Plank Collaboration and P. A. R. Ade and N. Aghanim and M. I. R. Alves and G. Aniano and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A. J. Banday and R. B. Barreiro and N. Bartolo and E. Battaner and K. Benabed and A. Benoit-Levy and J. -P. Bernard and M. Bersanelli and P. Bielewicz and A. Bonaldi and L. Bonavera and J. R. Bond and J. Borrill and F. R. Bouchet and F. Boulanger and C. Burigana and R. C. Butler and E. Calabrese and J. -F. Cardoso and A. Catalano and A. Chamballu and H. C. 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 A. Curto 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 C. Dickinson and J. M. Diego and H. Dole and S. Donzelli and O. Dore and M. Douspis and B. T. Draine and A. Ducout and X. Dupac and G. Efstathiou and F. Elsner and T. A. Ensslin and H. K. Eriksen and E. Falgarone and F. Finelli and O. Forni and M. Frailis and A. A. Fraisse and E. Franceschi and A. Frejsel and S. Galeotta and S. Galli and K. Ganga and T. Ghosh and M. Giard and E. Gjerlow and J. Gonzalez-Nuevo and K. M. Gorski and A. Gregorio and A. Gruppuso and V. Guillet and F. K. Hansen and D. Hanson and D. L. Harrison and S. Henrot-Versille and C. Hernandez-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and W. A. Holmes and W. Hovest and K. M. Huffenberger and G. Hurier and A. H. Jaffe and T. R. Jaffe and W. C. Jones and E. Keihanen and R. Keskitalo and T. S. Kisner and R. Kneissl and J. Knoche and M. Kunz and H. Kurki-Suonio and G. Lagache and J. -M. Lamarre and A. Lasenby and M. Lattanzi and C. R. Lawrence and R. Leonardi and F. Levrier and M. Liguori and P. B. Lilje and M. Linden-Vornle and M. Lopez-Caniego and P. M. Lubin and J. F. Macias-Perez and B. Maffei and D. Maino and N. Mandolesi and M. Maris and D. J. Marshall and P. G. Martin and E. Martinez-Gonzalez and S. Masi and S. Matarrese and P. Mazzotta and A. Melchiorri and L. Mendes and A. Mennella and M. Migliaccio and M. -A. Miville-Deschenes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and J. A. Murphy and P. Naselsky and P. Natoli and H. U. Norgaard-Nielsen and D. Novikov and I. Novikov and C. A. Oxborrow and L. Pagano and F. Pajot and R. Paladini and D. Paoletti and F. Pasian and O. Perdereau and L. Perotto and F. Perrotta and V. Pettorino and F. Piacentini and M. Piat 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 W. T. Reach and R. Rebolo and M. Reinecke and M. Remazeilles and C. Renault and I. Ristorcelli and G. Rocha and G. Roudier and J. A. Rubio-Martin and B. Rusholme and M. Sandri and D. Santos and D. Scott and L. D. Spencer and V. Stolyarov and R. Sudiwala and R. Sunyaev and D. Sutton and A. -S. Suur-Uski and J. -F. Sygnet and J. A. Tauber and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and M. Tucci and G. Umana and L. Valenziano and J. Valiviita and B. Van Tent and P. Vielva and F. Villa and L. A. Wade and B. D. Wandelt and I. K. Wehus and N. Ysard and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1409.2495},
year = {2016}
}
备注
Final version that has appeared in A&A