| Autor: |
Xianhan, Luo, Tijian, Zhou, Deyi, Yao, Shengfu, Du, Zhihan, Qian, Desheng, Ji, Weimin, Zhang |
| Zdroj: |
Vistas in Astronomy; January 1988, Vol. 31 Issue: 1 p161-163, 3p |
| Abstrakt: |
From 1986 March 31 to April 4 and again from April 13 to 17, the 1667 MHz OH line of comet Halley was observed in Shannxi Province of China with the 25m radio telescope of Shanghai Observatory and a 128-channel autocorrelation spectrometer of Peking University (Zhou et al., 1987). The bandwidth of the spectrometer was 625 kHz and the resolution was 4.92 kHz (0.89 km/s). The receiver was frequency switched with a frequency shift of 197 kHz (Despois et al., 1981). In order to improve the signal-to-noise ratio we accumulated the 1667 MHz profiles of April 13 to 17. According to the synthetic profile, we can summarize the results as follows: The observed mean OH flux of 4 days is −2.4Jy; the measured OH expansion velocity VOH=0.92 km/s; the first order moment ▵V =0.20 km/s; and the mean OH parent production rate Qp=1.7×1029mol./s. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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