IY Lyr is a thick-disk RRc star with a 1.37 solar-mass companion most likely a neutron star in a 3.94-year eccentric orbit, confirmed by photometry, spectroscopy, and astrometry.
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2 Pith papers cite this work. Polarity classification is still indexing.
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Semi-empirical Fourier analysis of photometry and velocities for Delta Cephei shows consistency with SPIPS temperature-driven luminosity when placed on a common phase, but absolute radius remains the dominant uncertainty.
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Semi-Empirical Pulsation Reconstruction of Delta Cephei with Photometry, Radial Velocities, and Temperature Constraints
Semi-empirical Fourier analysis of photometry and velocities for Delta Cephei shows consistency with SPIPS temperature-driven luminosity when placed on a common phase, but absolute radius remains the dominant uncertainty.