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Study of Three Rotating Radio Transients with FAST

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arxiv 1903.06364 v1 pith:E6AWBOCQ submitted 2019-03-15 astro-ph.HE

Jiguang Lu , Bo Peng , Kuo Liu , Peng Jiang , Youling Yue , Meng Yu , Ye-Zhao Yu , Feifei Kou
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Lin Wang FAST Collaboration
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keywords pulserratrratsfastj1913meanradiothree
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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, observed 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.

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