arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1602.05923astro-ph.COastro-ph.GA
收藏

合并星系团MACS J2243 .3-0935中新发现的射电晕

A Newly-Discovered Radio Halo in Merging Cluster MACS J2243.3-0935

T. M. Cantwell, A. M. M. Scaife, N. Oozeer, Z. L. Wen, J. L. Han

摘要:

我们报告了在大规模合并星团MACSJ2243.3-0935中发现的射电晕,以及一个新的射电遗迹候选者,使用巨型米波射电望远镜和KAT-7望远镜。射电晕与星团的X射线辐射一致,最大线性尺度约为0.9 Mpc。我们在610 MHz测量射电晕的流量密度为$10.0\pm 2.0$ mJy。我们讨论了团簇磁场的均分估计,并将其限制在1 $μ$ G的量级。遗迹的候选人被检测到的簇维里半径的细丝满足集群。遗迹候选者在610 MHz处的通量密度为$5.2\pm 0.8$ mJ y。我们讨论了可能的起源的遗迹候选人的排放,并得出结论,候选人是一致的坠落遗迹。

英文摘要:

We report the discovery of a radio halo in the massive merging cluster MACSJ2243.3-0935, as well as a new radio relic candidate, using the Giant Meterwave Radio Telescope and the KAT-7 telescope. The radio halo is coincident with the cluster X-ray emission and has a largest linear scale of approximately 0.9 Mpc. We measure a flux density of $10.0\pm 2.0$ mJy at 610 MHz for the radio halo. We discuss equipartition estimates of the cluster magnetic field and constrain the value to be of the order of 1 $μ$G. The relic candidate is detected at the cluster virial radius where a filament meets the cluster. The relic candidate has a flux density of $5.2\pm 0.8$ mJy at 610 MHz. We discuss possible origins of the relic candidate emission and conclude that the candidate is consistent with an infall relic.

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。

↑