A polarization study of the supernova remnant CTB 80

作者：李向华,孙晓辉,Wolfgang Reich,高旭阳

摘要：We present a radio polarization study of the supernova remnant CTB 80 based on images at1420 MHz from the Canadian Galactic Plane Survey,at 2695 MHz from the Effelsberg survey of the Galactic plane and at 4800 MHz from the Sino-Germanλ6 cm polarization survey of the Galactic plane.We obtained a rotation measure(RM)map using polarization angles at 2695 MHz and 4800 MHz as the polarization percentages are similar at these two frequencies.RM exhibits a transition from positive values to negative values along one of the shells hosting the pulsar PSR B1951+32 and its pulsar wind nebula.The reason for the change in sign remains unclear.We identified a partial shell structure,which is bright in polarized intensity but weak in total intensity.This structure could be part of CTB 80 or part of a new supernova remnant unrelated to CTB 80.

发文机构：Department of Astronomy Max-Planck-Institut fur Radioastronomie National Astronomical Observatories CAS Key Laboratory of FAST

关键词：ISMsupernovaremnantsISMmagneticfieldsPOLARIZATIONTECHNIQUESpolarimetric

分类号： P14[天文地球—天体物理]