赫歇尔探测的远红外/射电相关关系
摘要
我们旨在确定在远红外和射电波段选择的星系的静止系8-1000微米流量S(IR)与单色射电流量S(1.4GHz)的比值q(IR)，以寻找该比值随红移、光度或尘埃温度演化的迹象，并识别出任何远红外亮异常源——这些源是探索为何远红外/射电相关关系通常如此紧密（而主流理论却暗示变化几乎不可避免）的有用实验室。我们使用赫歇尔（HerMES；PEP）和VLA在GOODS-N天区获得的流量限制的250微米和1.4 GHz样本。我们利用PACS和SPIRE以及斯皮策、SCUBA、AzTEC和MAMBO的数据，利用覆盖24-1250微米的十个波段来确定总红外输出。我们还探索了一个L(IR)匹配样本的性质，该样本旨在揭示q(IR)随z的演化，覆盖log L(IR)=11-12 L_sun和z=0-2，通过将数据叠加到射电和远红外图像中。对于1.4 GHz选择的星系，我们看到了流量比q(IR)在L(1.4GHz)~10^22.7 W/Hz处存在断裂的初步证据，在该处活动星系核开始主导射电功率密度，并且看到了与z和T(d)的较弱相关性。从我们250微米选择的样本中，我们识别出少量远红外亮异常源，并看到了q(IR)随L(1.4GHz)、L(IR)、T(d)和z的变化趋势，注意到其中一些是相互关联的。对于我们的L(IR)匹配样本，没有证据表明当我们回溯到星系形成时代时q(IR)发生显著变化：我们发现q(IR)随(1+z)^gamma变化，其中在z=0-2范围内gamma = -0.04 ± 0.03；然而，如果忽略z<0.5时最不可靠的数据，我们得到gamma = -0.26 ± 0.07，这是一种适度的演化，可能与ARCADE2看到的射电背景有关，或许是由z>1处普通恒星形成星系中<10微央的射电活动驱动的。
引用
@article{arxiv.1005.1072,
title = {The far-infrared/radio correlation as probed by Herschel},
author = {R. J. Ivison and B. Magnelli and E. Ibar and P. Andreani and D. Elbaz and B. Altieri and A. Amblard and V. Arumugam and R. Auld and H. Aussel and T. Babbedge and S. Berta and A. Blain and J. Bock and A. Bongiovanni and A. Boselli and V. Buat and D. Burgarella and N. Castro and A. Cava and J. Cepa and P. Chanial and A. Cimatti and M. Cirasuolo and D. L. Clements and A. Conley and L. Conversi and A. Cooray and E. Daddi and H. Dominguez and C. D. Dowell and E. Dwek and S. Eales and D. Farrah and M. Fox and A. Franceschini and W. Gear and R. Genzel and J. Glenn and M. Griffin and C. Gruppioni and M. Halpern and E. Hatziminaoglou and K. Isaak and G. Lagache and L. Levenson and N. Lu and D. Lutz and S. Madden and B. Maffei and G. Magdis and G. Mainetti and R. Maiolino and L. Marchetti and G. E. Morrison and A. M. J. Mortier and H. T. Nguyen and R. Nordon and B. O'Halloran and S. J. Oliver and A. Omont and F. N. Owen and M. J. Page and P. Panuzzo and A. Papageorgiou and C. P. Pearson and A. and A. Poglitsch and M. Pohlen and P. Popesso and F. Pozzi and J. I. Rawlings and G. Raymond and D. Rigopoulou and L. Riguccini and D. Rizzo and G. Rodighiero and I. G. Roseboom and M. Rowan-Robinson and A. Saintonge and M. Sanchez Portal and P. Santini and B. Schulz and Douglas Scott and N. Seymour and L. Shao and D. L. Shupe and A. J. Smith and J. A. Stevens and E. Sturm and M. Symeonidis and L. Tacconi and M. Trichas and K. E. Tugwell and M. Vaccari and I. Valtchanov and J. Vieira and L. Vigroux and L. Wang and R. Ward and G. Wright and C. K. Xu and M. Zemcov},
journal= {arXiv preprint arXiv:1005.1072},
year = {2015}
}
备注
A&A Herschel Special Issue, in press as a Letter. 5 pages