1999年8月11日日全食期间的重力吸引效应研究

对1999年8月11日日全食阴影扫过欧洲期间,设在Annelles,Uccle,Walferdange和Bondy弹簧和超导重力仪的记录进行了分析.为了确定月亮对太阳万有引力可能的遮挡效应的极限,对超导和弹簧重力仪记录进行了比较.同时也对LCR和阿斯卡尼亚重力仪观测结果进行了讨论.结论是如果日食重力吸引效应存在,它应在超导重力仪±1 nm/s2(0.1×10-8ms-2)的观测精度范围之内.研究发现在以上情形下,弹簧和超导重力仪都在它们的精度范围内工作,并且日食引起的异常环境干扰可能使重力信号有重大的改变.

SEARCH FOR GRAVITATIONAL ABSORPTION EFFECT DURING TOTAL SOLAR ECLIPSE OF AUGUST 11,1999

In this paper we analyse the gravimetric records obtained with tidal instruments, during the solar eclipse on August 11, 1999, when the shadow crossed Europe. Measurements recorded with spring and super-conducting gravimeters set up in Annelles, Uccle, Walferdange and Bondy are discussed. Comparisons between super-conducting gravimeters and spring gravimeters are made, in order to fix the limits of the magnitude of abnormal effects in relation to the possibility of a shielding effect by the Moon on the Sun's gravitational attraction. The results from the LCR and Askania gravimeters will also be discussed in the paper. Our conclusions are that significant effects during an eclipse, if they exist indeed, may be below the noise level of the gravimeters, which is ± 1 nm/s2 (0.1 × 10-8 ms-2 ) for super-conducting gravimeters. Our findings confirm that in these situations both spring and super-conducting gravimeters are working at the limits of their precision, with a risk that abnormal environmental features induced by the eclipse could significantly modify the signals.