UV observations of macrospicules at the solar limb

Details UV observations of macrospicules at the solar limb UV observations of macrospicules at the solar limb

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..119...55d&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 119, no. 1, 1989, p. 55-63.

Physics

22

Solar Limb, Spicules, Ultraviolet Spectra, Coronal Holes, Extreme Ultraviolet Radiation, Spectroheliographs

Scientific paper

During the Spacelab 2 mission, the NRL High Resolution Telescope and Spectrograph obtained a time-series of broadband ultraviolet images of macrospicules at the solar limb inside a polar coronal hole with a temporal resolution of 20 and 60 s. The properties of the macrospicules observed in the Spacelab data are measured and compared with the properties reported for EUV macrospicules observed during Skylab (Bohlin et al., 1975; Withbroe et al., 1976). There is a general agreement between the data sets, but with several differences. Because of the higher temporal resolution of the Spacelab data, it is possible to see macrospicules with shorter lifetimes than seen during Skylab, as well as variations on faster time scales. The largest and fastest macrospicules seen during Skylab were not found in the Spacelab observations. The Spacelab data support the conclusion that many macrospicules decay by simply fading away.

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