Simultaneous observations of 20 centimeter bright points and He I 10830 A dark points in the quiet sun

Simultaneous observations of the quiet sun at 20 cm radio and He I wavelengths are used to establish the relationship between coronal bright points, as inferred from the 20-cm radio emission, and He I dark points. It is shown that the 20-cm radio emission, which originates from the low corona-transition region, is always associated with regions of enhanced He I absorption; however, it does not always coincide with strong He I 10830 A absorption regions known as He I dark points. Significant fluctuations in the intensity of 20-cm radio emission and He I absorption take place on time scales of minutes. 23 references