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2000•Publications of the Astronomical Society of the PacificOpen access

The RR Lyrae Star V442 Herculis: An Extreme Case of Light‐Curve Modulation

E. G. Schmidt, K. M. Lee

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Abstract

We have obtained photometric observations of the peculiar RR Lyrae star V442 Her during six observing seasons spanning an elapsed time of nearly 9 years. The period has undergone two large, abrupt changes in the past 5 years. Although light‐curve modulation is fairly common among RR Lyrae stars, the modulation of the light curve of V442 Her is highly unusual for its large amplitude, long period, extreme alterations in light‐curve shape, and large period changes.

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We have obtained photometric observations of the peculiar RR Lyrae star V442 Her during six observing seasons spanning an elapsed time of nearly 9 years. The period has undergone two large, abrupt changes in the past 5 years. Although light‐curve modulation is fairly common among RR Lyrae stars, the modulation of the light curve of V442 Her is highly unusual for its large amplitude, long period, extreme alterations in light‐curve shape, and large period changes.

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Available abstract

We have obtained photometric observations of the peculiar RR Lyrae star V442 Her during six observing seasons spanning an elapsed time of nearly 9 years. The period has undergone two large, abrupt changes in the past 5 years. Although light‐curve modulation is fairly common among RR Lyrae stars, the modulation of the light curve of V442 Her is highly unusual for its large amplitude, long period, extreme alterations in light‐curve shape, and large period changes.

Key concepts: RR Lyrae variable, Light curve, Physics, Astrophysics, Amplitude, Modulation (music), Stars, Star (game theory)

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