论文标题
快速凝视银河系：iv。识别两个新的银河超新星残留物G203.1+6.6和G206.7+5.9
Peering into the Milky Way by FAST: IV. Identification of two new Galactic supernova remnants G203.1+6.6 and G206.7+5.9
论文作者
论文摘要
a 5 $^{\ circ} $ $ \ times $ 7 $^{\ circ} $天空区域，其中包含两个大型无线电结构，g203.1+6.6+6.6和g206.7+5.9+5.9+5.9+5.9，大约为2.5 $^{\ circ} $和3.5 $^{\ circ} $，分别通过使用ll-band sperrure sperdred cann five five five five five forever。望远镜（快速）。快速L波段接收器的频率范围为1.0-1.5 GHz。通过观察校准器来使接收系统的调试，包括测量半功率梁宽度，增益和主束效率。安装在接收器上的多通道光谱后端允许频段频谱指数测定。两个对象的亮度 - 温度光谱指数均被测量为$β$ $ \ sim $ $ - $ 2.6至$ - $ 2.7。从Archival Effelsberg $λ$ 11 cm数据中检测到极化的发射，用于G203.1+6.6和G206.7+5.9的所有外壳结构。这些结果清楚地表明了非热同步子发射性质，证实了G203.1+6.6和G206.7+5.9是大型壳型超级新星残留物（SNRS）。基于G206.7+5.9的无线电连续发射与HI结构之间的形态相关性，估计与该新SNR的运动距离约为440 PC，将其放在局部臂中。
A 5$^{\circ}$ $\times$ 7$^{\circ}$ sky area containing two large radio structures of G203.1+6.6 and G206.7+5.9 with a size of about 2.5$^{\circ}$ and 3.5$^{\circ}$ respectively is scanned by using the L-band 19-beam receiver of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The FAST L-band receiver covers a frequency range of 1.0-1.5 GHz. Commissioning of the receiving system, including the measurements of the half-power beam width, gain, and main-beam efficiency is made by observing the calibrators. The multi-channel spectroscopy backend mounted to the receiver allows an in-band spectral-index determination. The brightness-temperature spectral indices of both objects are measured to be $β$ $\sim$ $-$2.6 to $-$2.7. Polarized emission is detected from the archival Effelsberg $λ$11 cm data for all the shell structures of G203.1+6.6 and G206.7+5.9. These results clearly indicate a non-thermal synchrotron emitting nature, confirming that G203.1+6.6 and G206.7+5.9 are large shell-type supernova remnants (SNRs). Based on morphological correlation between the radio continuum emission of G206.7+5.9 and the HI structures, the kinematic distance to this new SNR is estimated to be about 440 pc, placing it in the Local Arm.
