2006年3月29日日食期间太阳附近尘埃的速度和掠日彗星
The velocity of the dust near the Sun during the Solar Eclipse of March 29, 2006 and sungrazing comets
摘要：
通过对F日冕中尘埃粒子散射的夫琅和费谱线的多普勒频移的测量，可以了解尘埃粒子的速度场，从而了解尘埃粒子的起源。我们报告在2006年3月29日日全食期间获得的测量结果。我们用视场为5.9 °、光谱分辨率约为5000的法布里-珀罗干涉仪记录了F日冕尘埃散射的夫琅和费谱线。光谱区域以MgI 5172.69 A线为中心。观测到的视线速度的振幅在-10 ~10 km/s范围内，表明在观测期间，尘埃颗粒在轨道上沿一个几乎垂直于黄道的平面逆行。这表明了它们的彗星起源。事实上，在2006年3月底，SOHO记录了几颗掠日彗星，其轨道要素接近我们的测量结果。我们的结论是，彗星的贡献，在该地区的尘埃含量接近太阳可以更重要，虽然变量的时间。我们还推断，在我们的观测过程中，大多数尘埃颗粒的尺寸小于0.1微米。
英文摘要：
The measurements of the Doppler shifts of the Fraunhofer lines, scattered by the dust grains in the solar F-corona, provides the insight on the velocity field of the dust and hence on its origin. We report on such measurements obtained during the total eclipse of March 29, 2006. We used a Fabry-Pérot interferometer with the FOV of 5.9 degrees and the spectral resolution of about 5000 to record Fraunhofer spectral lines scattered by the dust of the F-Corona. The spectral region was centered on the MgI 5172.69 A line. The measured line-on-sight velocities with the amplitude in the range from -10 to 10 km/s show that during our observations the dust grains were on the orbit with a retrograde motion in a plane nearly perpendicular to the ecliptics. This indicates their cometary origin. Indeed, at the end of March, 2006, SOHO recorded several sungrazing comets with the orbital elements close to what was deduced from our measurements. We conclude that the contribution of comets to the dust content in the region close to the Sun can be more important albeit variable in time. We also deduce that the size of the most of the dust grains during our observations was less than 0.1 microns.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
