Limits to CCD ensemble photometry precision, and prospects for asteroseismology

Details Limits to CCD ensemble photometry precision, and prospects for asteroseismology Limits to CCD ensemble photometry precision, and prospects for asteroseismology

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasp..104..582g&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 104, no. 677, July 1992, p. 582-591.

Physics

39

Astronomical Photometry, Open Clusters, Seismology, Solar Oscillations, Stellar Evolution, Stellar Physics, Charge Coupled Devices, P Waves, Stellar Oscillations, Stellar Structure, Time Series Analysis

Scientific paper

Results are reported of CCD-ensemble time-resolved photometry with the KPNO 2.1-m telescope yielding precision of 400 micromag per minute of integration. Detailed stellar-evolution modeling and eigenfrequency-analysis results are given for the stars of the old open cluster M67. Using observed amplitudes of solar p-mode oscillations, and published scaling laws with spectral type, direct detection of solar-analog oscillations on 13th-magnitude M67 stars is possible with a several-night 4-m network campaign. Asteroseismology on a substantial ensemble of cluster stars promises to allow fundamental tests of stellar structure and evolution theory.

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