近日，澳大利亚斯威本科技大学的R. M. Shannon及其研究小组取得一项新进展。经过不懈努力，他们观测到红移1处探测宇宙的明亮快速射电暴。相关研究成果已于2023年10月20日在国际权威学术期刊《科学》上发表。

在这项工作中，研究人员观测到了一个名为FRB 20220610A的快速射电暴，并将其定位在一个形态复杂的宿主星系系统中，红移为1.016±0.002。通过对爆发红移和色散的测量，研究人员发现其与星系间介质中的等离子体柱穿越相一致，并扩展了之前在较低红移测量中得到的关系。此外，该爆发还显示了穿越额外的湍流磁化等离子体的证据，可能与宿主星系有关。研究人员修正了快速射电暴的经验最大能量，得出其爆发能量为2 × 10⁴² erg。

据悉，快速射电暴（FRBs）是一种源自河外星系、持续时间仅为毫秒级的射电脉冲。这些射电脉冲在传播过程中会受到介入性等离子体的影响，导致射电色散。而这些等离子体主要存在于星系间的介质中。

附：英文原文

Title: A luminous fast radio burst that probes the Universe at redshift 1

Author: S. D. Ryder, K. W. Bannister, S. Bhandari, A. T. Deller, R. D. Ekers, M. Glowacki, A. C. Gordon, K. Gourdji, C. W. James, C. D. Kilpatrick, W. Lu, L. Marnoch, V. A. Moss, J. X. Prochaska, H. Qiu, E. M. Sadler, S. Simha, M. W. Sammons, D. R. Scott, N. Tejos, R. M. Shannon

Issue&Volume: 2023-10-20

Abstract: Fast radio bursts (FRBs) are millisecond-duration pulses of radio emission originating from extragalactic distances. Radio dispersion is imparted on each burst by intervening plasma, mostly located in the intergalactic medium. In this work, we observe the burst FRB 20220610A and localize it to a morphologically complex host galaxy system at redshift 1.016 ± 0.002. The burst redshift and dispersion measure are consistent with passage through a substantial column of plasma in the intergalactic medium and extend the relationship between those quantities measured at lower redshift. The burst shows evidence for passage through additional turbulent magnetized plasma, potentially associated with the host galaxy. We use the burst energy of 2 × 10⁴² erg to revise the empirical maximum energy of an FRB.

DOI: adf2678

Source: https://www.science.org/doi/10.1126/science.adf2678