Ultraviolet jets and bright points in the solar chromosphere: I : search for one-to-one relationships

Abstract

Ultraviolet spectrograms and spectroheliograms of the solar chromosphere are used to test the suggestion (Dere et al. 1986, Rutten & Uitenbroek 1991a) that bright points observed at h = 1600 Å, chromospheric jets observed in CI lines near h = 1560 Å, and Ca II K2V bright points are associated with each other and that they are all manifestations of the same wave interaction in the non-magnetic chromosphere. We search for spatio-temporal connections between 1600 Å bright points and CI blue jets using data from the HRTS VI rocket mission, comparing 1600 Å spectroheliograms and a co-spatial CI Dopplershift map on a pixel-by-pixel basis. We find no direct evidence for spatial co-location of bright points and jets, not for instantaneous correspondence and also not when allowing for phase delays as long as three minutes. Also, the average brightness evolution and its rms uctuation are not obviously different between sites of large CI blueshift and the remaining surface.