Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225..542p&link_type=abstract
Astrophysical Journal, Part 1, vol. 225, Oct. 15, 1978, p. 542-547.
Astronomy and Astrophysics
Astrophysics
23
Astronomical Photometry, Binary Stars, Polarimetry, White Dwarf Stars, X Ray Stars, Circular Polarization, Correlation Coefficients, Light Curve, Magnetic Stars, Phase Deviation, Spectral Bands
Scientific paper
Via simultaneous multicolor photometry and polarimetry of AM Herculis, we find correlations among polarization, flux, and color in the V and I bands in periodic and nonperiodic (i.e., flickering) activity. The primary minimum observed in both bands is accompanied by a blueward shift of the (B - R) color and a decrease in the absolute value of the percent circular polarization in the V band. Outside primary minimum, peaks of flickering activity tend to be associated with an increase in the absolute value of the circular polarization and the concurrent reddening of the (B - R) and (R - I) colors. The visual light curve of AM Her can be explained by a flickering, circularly polarized light source which is obscured at primary minimum, and is redder than the total system color in the URVRI bands.
Krzeminski Wojciech
Priedhorsky William C.
Tapia Saul
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