标题： 用ASKAP发现一个新的河外圆形射电源：ORC J0102-2450 显示英文标题

标题： Discovery of a new extragalactic circular radio source with ASKAP: ORC J0102-2450

摘要： 我们介绍了使用澳大利亚平方公里阵列探路者（ASKAP）在944 MHz处发现的另一个奇特射电环（ORC）。观测到的射电环ORC J0102-2450的直径约为70角秒或300 kpc，如果与中心椭圆星系DES J010224.33-245039.5（z ~ 0.27）相关的话。 考虑到整体射电形态（圆形环和核心）以及非射电波长下缺乏环发射，我们研究了ORC J0102-2450是否可能是从端视方向看到的巨大射电星系的遗迹瓣，或者是巨大冲击波的结果。 我们还探讨了可能的相互作用情景，例如与位于环东南部或投影在环东南部的伴星系DES J010226.15-245104.9的相互作用。 我们鼓励在射电调查中进一步搜索更多的ORC以研究它们的特性和起源。 显示英文摘要

摘要： We present the discovery of another Odd Radio Circle (ORC) with the Australian Square Kilometre Array Pathfinder (ASKAP) at 944 MHz. The observed radio ring, ORC J0102-2450, has a diameter of ~70 arcsec or 300 kpc, if associated with the central elliptical galaxy DES J010224.33-245039.5 (z ~ 0.27). Considering the overall radio morphology (circular ring and core) and lack of ring emission at non-radio wavelengths, we investigate if ORC J0102-2450 could be the relic lobe of a giant radio galaxy seen end-on or the result of a giant blast wave. We also explore possible interaction scenarios, for example, with the companion galaxy, DES J010226.15-245104.9, located in or projected onto the south-eastern part of the ring. We encourage the search for further ORCs in radio surveys to study their properties and origin.