普朗克早期结果：邻近分子云中的热尘埃
星系天体物理
2015-05-27 v4
摘要
普朗克卫星能够对从最弥散区域到分子云最致密部分的银河系亚毫米和毫米波辐射进行无偏成像。我们呈现了对金牛座分子复合体的早期分析，基于视线平均数据且未进行成分分离。普朗克和IRAS测量的发射谱可以通过逐像素拟合单个修正黑体谱来描述。在353 GHz和143 GHz处检测到一些系统性残差，幅度分别约为-7%和+13%，表明测量谱可能比简单的修正黑体谱更为复杂。在分子区域以及217 GHz和100 GHz波段也检测到显著的正残差，主要由J=2-1和J=1-0的12CO和13CO发射线的贡献引起。我们推导了尘埃温度T、尘埃光谱发射率指数β以及250微米处尘埃光学深度τ的分布图。温度图展示了尘埃粒子在与入射辐射场热平衡下的冷却过程，从弥散区域的16-17 K下降到致密区域的13-14 K。光谱指数的分布中心值为1.78，标准差为0.08，系统误差为0.07。我们检测到显著的T-β反相关。尘埃光学深度图揭示了从最致密分子区域到微弱弥散区域的分子复合体柱密度的空间分布。我们利用近红外消光和21厘米HI数据，对测量的每氢原子250微米尘埃光学深度τ/NH的空间变化进行了定量分析。我们报告了τ/NH从原子相到分子相增加了约2倍，这对尘埃粒子的平衡温度有强烈影响。
引用
@article{arxiv.1101.2037,
title = {Planck Early Results: Thermal dust in Nearby Molecular Clouds},
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. Benoît and J. -P. Bernard and M. Bersanelli and R. Bhatia 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 J. -F. Cardoso and A. Catalano and L. Cayón 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. Désert and C. Dickinson and K. Dobashi and S. Donzelli and O. Doré and U. Dörl 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-Héraud and J. González-Nuevo and K. M. Górski and S. Gratton and A. Gregorio and A. Gruppuso and V. Guillet and F. K. Hansen and D. Harrison and S. Henrot-Versillé 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 A. Jones and W. C. Jones and M. Juvela and E. Keihänen 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-Vørnle and M. López-Caniego and P. M. Lubin and J. F. Macías-Pérez and C. J. MacTavish and B. Maffei and N. Mandolesi and R. Mann and M. Maris and D. J. Marshall and P. Martin and E. Martínez-González 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 S. Mitra and M. -A. Miville-Deschênes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and A. Murphy and P. Naselsky and P. Natoli and C. B. Netterfield and H. U. Nørgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov 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 S. Plaszczynski and E. Pointecouteau and G. Polenta and N. Ponthieu and T. Poutanen and G. Prézeau and S. Prunet and J. -L. Puget and W. T. Reach and R. Rebolo and M. Reinecke and C. Renault and S. Ricciardi and T. Riller and I. Ristorcelli and G. Rocha and C. Rosset and J. A. Rubiño-Martín 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. 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 L. Verstraete and P. Vielva and F. Villa and N. Vittorio and L. A. Wade and B. D. Wandelt and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1101.2037},
year = {2015}
}
备注
Planck early paper accepted for publication in Astronomy & Astrophysics, 18 pages