Physics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.5084b&link_type=abstract
HST Proposal ID #5084
Physics
Hst Proposal Id #5084
Scientific paper
Almost all studies of short-period RR Lyrae stars have mentioned the possibility of small-scale fluctuations in light curves or short time-scale changes in absorption line strengths. While careful examination of high signal-to-noise ratio visible light curves has failed to confirm such behavior, fluctuations may still be detectable in the ultraviolet region. These would reflect such phenomena as shock waves generated by the pulsation in the outer stellar envelope. We propose high time resolution, high signal-to noise ratio observations of a sample of such stars to characterize the ultraviolet pulsation and investigate the pulsation effects in the upper atmosphere. Revision History: Received on RPS 9/1/89; Added to SCCS 9/5/89 RPSS V7.2 remote & local; Small syntax errs fixed - SALM 9/14/89 Move 2 targ to cycle 2 - SALM 3/5/90; Added ANALOG datafmt - SALM 7/11/90; Made changes re team meeting 7/18/90--BJW 7/23/90; Split proposal by cycle-- BJW 3/24/91;
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