Planck 中期结果。XXXII. 磁场与星际尘埃示踪结构之间的相对取向
星系天体物理
2016-02-10 v4
摘要
磁场在星际介质 (ISM) 中观测到的丝状结构形成中的作用是一个备受争议的话题。Planck 在 353GHz 处对尘埃线性偏振发射的全天图提供了所需的成像和统计组合，以研究银河磁场结构与星际物质结构之间的相关性，无论是在弥散 ISM 中还是在分子云中。数据揭示了强度图中的结构或脊，其在 Stokes Q 和/或 U 图中有对应物。我们专注于银纬中等和高纬度、柱密度从 到 cm 的结构。我们利用偏振数据测量天空平面上的磁场取向，并提出一种算法从尘埃强度图估计脊的取向。我们使用解析模型来解释投影效应。通过比较结构上和结构外的偏振角，我们估计磁场湍流分量与平均分量强度之间的平均比率在 0.6 到 1.0 之间，首选值为 0.8。我们发现脊优先与在结构上测量的磁场对齐。随着偏振分数的增加和柱密度的降低，这种趋势变得更加显著。我们将对齐度随偏振分数的增加解释为投影效应的结果。高柱密度下对齐度的降低并非由于结构与磁场几何形状之间相关性的丧失。在分子复合体中，我们观测到垂直于磁场的结构，这无法用投影效应来解释。我们在描述磁化 ISM 中结构形成的模型和 MHD 模拟背景下讨论我们的结果。
引用
@article{arxiv.1409.6728,
title = {Planck intermediate results. XXXII. The relative orientation between the magnetic field and structures traced by interstellar dust},
author = {Planck Collaboration and R. Adam and P. A. R. Ade and N. Aghanim and M. I. R. Alves and M. Arnaud and D. Arzoumanian 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-Lévy 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 A. Bracco 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 S. Colombi and L. P. L. Colombo and C. Combet 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. Doré and M. Douspis and A. Ducout and X. Dupac and G. Efstathiou and F. Elsner and T. A. Enßlin and H. K. Eriksen and E. Falgarone and K. Ferrière 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. Gjerløw and J. González-Nuevo and K. M. Górski and A. Gregorio and A. Gruppuso and V. Guillet and F. K. Hansen and D. Hanson and D. L. Harrison and S. Henrot-Versillé and C. Hernández-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. Keihänen 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-Vørnle and M. López-Caniego and P. M. Lubin and J. F. Macías-Pérez and B. Maffei and D. Maino and N. Mandolesi and M. Maris and D. J. Marshall and P. G. Martin and E. Martínez-González 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-Deschênes 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. Nørgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and N. Oppermann and C. A. Oxborrow and L. Pagano and F. Pajot 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 M. Reinecke and M. Remazeilles and C. Renault and I. Ristorcelli and G. Rocha and G. Roudier and J. A. Rubiño-Martín and B. Rusholme and M. Sandri and D. Santos and G. Savini and D. Scott and J. D. Soler 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 H. Wiesemeyer and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1409.6728},
year = {2016}
}
备注
Submitted to Astronomy & Astrophysics