Study of three rotating radio transients with FAST
Study of three rotating radio transients with FAST
复制标题
DOI：
10.1007/s11433-018-9372-7
复制
发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Jiguang Lu;B. Peng;Kuo Liu;P. Jiang;Y. Yue;Meng Yu;Ye-Zhao Yu;F. Kou;Lin Wang;Fast collaboration
中科院分区：
文献类型：
--
作者：
Jiguang Lu;B. Peng;Kuo Liu;P. Jiang;Y. Yue;Meng Yu;Ye-Zhao Yu;F. Kou;Lin Wang;Fast collaboration
旋转射电瞬变（RRAT）是一种特殊的天体，其发射机制仍在研究中。在本文中，我们介绍了三个RRAT，J1538+2345，J1854+0306和J1913+1330，进行了500米口径球面射电望远镜（FAST）的观测。具体来说，我们分析的平均脉冲轮廓和时间通量密度演变的RRAT。由于FAST的高灵敏度，三种RRAT的推导出的突发速率高于以前的报告。RRAT J1854+0306表现出时间动态平均脉冲轮廓，而RRAT J1913+1330在其脉冲强度序列上表现出明显的辐射和零化段。研究了RRAT J1538+2345和RRAT J1913+1330的平均脉冲波形随频率的变化，发现不同频率下的脉冲波形分别可以用锥核模型和锥束模型进行很好的拟合。
Rotating radio transients (RRATs) are peculiar astronomical objects whose emission mechanism remains under investigation. In this paper, we present observations of three RRATs, J1538+2345, J1854+0306 and J1913+1330, carried out with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Specifically, we analyze the mean pulse profiles and temporal flux density evolutions of the RRATs. Owing to the high sensitivity of FAST, the derived burst rates of the three RRATs are higher than those in previous reports. RRAT J1854+0306 exhibited a time-dynamic mean pulse profile, whereas RRAT J1913+1330 showed distinct radiation and nulling segments on its pulse intensity trains. The mean pulse profile variation with frequency is also studied for RRAT J1538+2345 and RRAT J1913+1330, and the profiles at different frequencies could be well fitted with a cone-core model and a conal-beam model, respectively.