太陽(yáng)西側(cè)臨邊的條珥

A solar filament is an enormous stream of incandescent plasma suspended above the active surface of the Sun by looping magnetic fields. Seen against the solar disk it looks dark only because it’s a little cooler, and so slightly dimmer, than the solar photosphere. Suspended above the solar limb the same structure looks bright when viewed against the blackness of space and is called a solar prominence. A filaprom would be both of course, a stream of magnetized plasma that crosses in front of the solar disk and extends beyond the Sun’s edge. In this hydrogen-alpha close-up of the Sun captured on June 22, active region AR3038 is near the center of the frame. Active region AR3032 is seen at the far right, close to the Sun’s western limb. As AR3032 is carried by rotation toward the Sun’s visible edge, what was once a giant filament above it is now partly seen as a prominence, How big is AR3032’s filaprom? For scale planet Earth is shown near the top right corner.

太陽(yáng)暗條是受到太陽(yáng)環(huán)狀磁場(chǎng)的局束，懸浮在太陽(yáng)活躍表面上方的龐大白熾電漿流。由于它以太陽(yáng)盤(pán)面為襯底，溫度又比太陽(yáng)光球?qū)勇缘?，故看起?lái)較暗。日珥為懸浮在太陽(yáng)臨邊上方的相同結(jié)構(gòu)，但以黝黑的太空為背景，故看起來(lái)很明亮。條珥則是二者的復(fù)合體，是通過(guò)日盤(pán)前方并伸展到臨邊之外的磁化電漿流。在這攝于6月22日、使用氫α濾鏡記錄的太陽(yáng)特寫(xiě)影像里，活躍區(qū)AR3038位于視野的中心附近，而活躍區(qū)AR3032位在太陽(yáng)的西側(cè)臨邊附近（右方）。由于太陽(yáng)自轉(zhuǎn)把AR3032帶到太陽(yáng)的可見(jiàn)臨邊附近，讓本來(lái)是日盤(pán)上方的龐然暗條，部分伸到臨邊外頭成為突起的日珥。AR3032的條珥有多大呢？影像右上角的地球可作為尺標(biāo)。