Secrets in Starlight: The Strange Case of a R Coronae Borealis

Details Secrets in Starlight: The Strange Case of a R Coronae Borealis Secrets in Starlight: The Strange Case of a R Coronae Borealis

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001javso..29..155d&link_type=abstract

The Journal of the American Association of Variable Star Observers, vol. 29, no. 2, p.155

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R Coronae Borealis, Variable Stars

Scientific paper

This high school science project attempts to provide an explanation for the varying light output of 1544+28A R Coronae Borealis. Using my own visual data in conjunction with published spectroscopic data, the star's reason for variability was explored. Visual analysis of the behavior of R CrB was achieved from 85 observations collected over an interval of 331 nights using instruments ranging in size from 7 x 50 binoculars to a 12" Schmidt-Cassegrain telescope. Through research and data collection, I have determined that R CrB is an old star that has finished fusing hydrogen into helium, and now fuses helium into carbon. The fusing of helium into carbon forms dust (carbon) clouds. The variable density of the cloud yields changes in the brightness of R CrB. The value of investigating the nature of R CrB lay in the attempt to develop a sound explanation of what is happening astrophysically by incorporating all o fthe measurable properties and changes in starlight. By applying our understanding of astrophysics, the understanding of stellar evolution is further developed. From this study alone, it has been determined that R CrB is an ancient star undergoing rapid adjustment to maintain stability in it fusion process.

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