论文标题
彗星21p/giacobini-zinner的成像极化和光度法
Imaging polarimetry and photometry of comet 21P/Giacobini-Zinner
论文作者
论文摘要
我们报告了2018年9月10日至17日之间的相角21p/giacobini-zinner彗星21p/giacobini-zinner的极化观测结果，并将其与先前的测量值进行了比较。我们发现偏振信号的显着变化，这些信号似乎与之前报道的信号一致。这些变化和随后的建模表明，昏迷中的颗粒在大约一天之内得到补充。对于高吸收碳质颗粒而言，这一时期比不吸收富含MG的硅酸盐颗粒要短。这些成分的相对丰度的这种差异会导致昏迷的极化响应的变化。在下极方向上的强阳性极化表明碳质物质的相对丰度很大，这可能是喷气型活性的指标。
We report results of polarimetric observations of comet 21P/Giacobini-Zinner made at phase angles, α=76-78 deg, between 10 and 17 of September 2018, and compare them with previous measurements. We find significant variations in the polarimetric signals that appear consistent with those reported previously. These variations and subsequent modeling suggest that the particles in the coma are replenished within a period of approximately one day. This period is significantly shorter for highly absorbing carbonaceous particles than for non-absorbing Mg-rich silicate particles. Such a difference in the relative abundances of these components can lead to variations in the polarization response of the coma. The strong positive polarization in the subsolar direction suggests a large relative abundance of carbonaceous material, which may be an indicator of jet-type activity.
