论文标题
2017年9月6日的遥远的LIMB CME的无线电签名
Radio signature of a distant behind-the-limb CME on 2017 September 6
论文作者
论文摘要
我们讨论了IV型爆发的属性，该爆发是由于强大的耀斑X 9.3在2017年9月6日观察到的。在deTemeter波长时，射程望远镜立体声A，Uran -2和NDA以5-35 MHz的速度观察到了这种爆发。这种移动的IV型爆发与在西南方向传播的冠状质量弹出（CME）相关，速度为1570 km/s。此爆发的最大无线电通量约为300 s.f.u.极化超过40％。在8-33 MHz的频率范围内，它持续了2小时以上。对于立体声A，相关的CME在肢体后面，其纵向角度约为160度。尽管立体声A的敏感性低，这是通过5-15 MHz的频率以5-15 MHz的频率观察到的IV型爆发。这意味着IV型爆发的无线电发射方向性相当宽。假设IV型无线电发射的等离子体机制，我们以5.6 rs和9.8 rs的距离得出了CME芯中的血浆密度分布，其质量约为10^16 g。据计划，Parker太阳能探针（PSP）航天器的最小围栏将约为9卢比。因此，如果PSP越过类似的CME核心，我们将在什么情况下讨论。
We discuss properties of a Type IV burst, which was observed on 2017 September 6, as a result of the powerful flare X 9.3. At decameter wavelengths this burst was observed by the radio telescopes STEREO A, URAN-2, and NDA at frequencies 5 - 35 MHz. This moving Type IV burst was associated with a coronal mass ejection (CME) propagating in the southwest direction with a speed of 1570 km/s. The maximum radio flux of this burst was about 300 s.f.u. and the polarization was more than 40%. In the frequency range of 8-33 MHz it continued for more than 2 hr. For STEREO A the associated CME was behind the limb, its longitudinal angle was about 160 degrees. This moving Type IV burst was observed by STEREO A at frequencies of 5-15 MHz in spite of the low sensitivity of STEREO A. This means that the radio emission directivity of a Type IV burst is rather wide. Assuming the plasma mechanism of Type IV radio emission we derived the plasma density distribution in the CME core at distances of 5.6 Rs and 9.8 Rs and its mass to be about 10^16 g . It is planned that the minimum perihelion of the Parker Solar Probe (PSP) spacecraft will be at about 9 Rs. So we discuss in what conditions PSP will be in if it crosses a similar CME core.
