arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.07584astro-ph.GA
收藏

连接宇宙网细丝中两个星系团的射电脊

A radio ridge connecting two galaxy clusters in a filament of the cosmic web

F. Govoni, E. Orrù, A. Bonafede, M. Iacobelli, R. Paladino, F. Vazza, M. Murgia, V. Vacca, G. Giovannini, L. Feretti, F. Loi, G. Bernardi, C. Ferrari, R. F. Piz… 展开作者

F. Govoni, E. Orrù, A. Bonafede, M. Iacobelli, R. Paladino, F. Vazza, M. Murgia, V. Vacca, G. Giovannini, L. Feretti, F. Loi, G. Bernardi, C. Ferrari, R. F. Pizzo, C. Gheller, S. Manti, M. Brüggen, G. Brunetti, R. Cassano, F. de Gasperin, T. A. Enßlin, M. Hoeft, C. Horellou, H. Junklewitz, H. J. A. Röttgering, A. M. M. Scaife, T. W. Shimwell, R. J. van Weeren, M. Wise

摘要:

星系团是宇宙中最大的引力束缚结构。它们通过在合并过程中吸积较小的结构而成长,在星系团内的气体中产生冲击和湍流。我们观察到一个无线电发射脊连接合并的星系团阿贝尔0399和阿贝尔0401与低频阵列(LOFAR)在140兆赫。这种发射需要相对论性电子的数量和位于两个星系团之间的灯丝中的磁场。我们进行了模拟,以表明弱冲击的体积填充分布可能会重新加速预先存在的相对论粒子群,产生无线电波长的辐射,照亮磁脊。

英文摘要:

Galaxy clusters are the most massive gravitationally bound structures in the Universe. They grow by accreting smaller structures in a merging process that produces shocks and turbulence in the intra-cluster gas. We observed a ridge of radio emission connecting the merging galaxy clusters Abell 0399 and Abell 0401 with the Low Frequency Array (LOFAR) at 140 MHz. This emission requires a population of relativistic electrons and a magnetic field located in a filament between the two galaxy clusters. We performed simulations to show that a volume-filling distribution of weak shocks may re-accelerate a pre-existing population of relativistic particles, producing emission at radio wavelengths that illuminates the magnetic ridge.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑