脉冲星B0943 +10 - VI漂移子脉冲辐射的子束拓扑和偏振特性。8小时GMRT观察结果分析
The topology and polarization of subbeams associated with drifting subpulse emission of pulsar B0943+10 - VI. Analysis of an 8-hour GMRT observation
摘要：
我们报告的8小时观测PSR B 0943 +10在325 MHz的巨型米波射电望远镜（GMRT）在印度进行的分析。B 0943 +10以显示规则的子脉冲漂移和两种发射模式而闻名。我们研究了B 0943 +10的模态行为。通过从两个连续的“B”模式重建整个“B”模式，我们估计脉冲星平均在“B”模式中花费大约7.5小时，在“Q”模式中花费大约2.2小时。虽然脉冲星可以在一个脉冲内切换模式，但子脉冲漂移率在“B”模式过程中的特征时间为1.2小时。在子束转盘模型下，我们发现漂移率的变化是由子束平均数目增加10%和转盘循环时间增加16%引起的。我们推测，在部分屏蔽间隙模型下，循环时间的增加应该与中子星表面温度的小幅增加有关。
英文摘要：
We report analysis of an 8 hr observation of PSR B0943+10 at 325 MHz performed at the Giant Metrewave Radio Telescope (GMRT) in India. B0943+10 is well known for displaying regular sub-pulse drifting and two emission modes. We investigate the modal behavior of B0943+10. By reconstructing an entire 'B' mode from two consecutive 'B' modes, we estimate that the pulsar spends roughly 7.5 hrs in the 'B' mode and about 2.2 hrs in the 'Q' mode, on average. Although the pulsar can switch modes within one pulse, the sub-pulse drift rate changes with a characteristic time of 1.2 hrs over the course of a 'B' mode. Under the subbeam carousel model we find the drift-rate changes are produced by a 10% increase in the average number of subbeams and a 16% increase in the carousel circulation time. We speculate that under the partially screened gap model the increase in circulation time should be related to a small increase in the neutron star surface temperature.
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