Multicolor photometry of AM Herculis = 3U 1809 + 50

Abstract

view Abstract Citations (23) References (7) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Multicolor photometry of AM Herculis = 3U 1809+50. Olson, E. C. Abstract Results are reported for multicolor photometric observations of the X-ray eclipsing binary AM Her, which were performed at effective wavelengths of 0.35 to 0.86 micron through nine orbital cycles. Composite light curves are plotted for the visual, IR, violet, and UV observations; light curves for observations on individual nights in white light, blue, and IR are also provided. It is found that a broad 'primary' eclipse lasting at least half the orbital period is conspicuous at wavelengths longer than the violet, the violet and UV eclipses occur later than those at longer wavelengths, considerable scatter is present at all wavelengths during nominal eclipse egress, and a shallow 'secondary' eclipse sometimes occurs at the longer wavelengths. The blue spectrum of AM Her is discussed, and the best-defined optical characteristic of the system is shown to be a linear polarization event at photometric phase 0.40. Publication: The Astrophysical Journal Pub Date: July 1977 DOI: 10.1086/155344 Bibcode: 1977ApJ...215..166O Keywords: Eclipsing Binary Stars; Electrophotometry; Light Curve; Stellar Spectrophotometry; X Ray Stars; Colorimetry; Infrared Astronomy; Polarization (Waves); Stellar Magnitude; Ultraviolet Photometry; Astrophysics full text sources ADS | data products SIMBAD (1)