Visual Versus Near-Infrared Variability of R For: Evidence for a Multiperiodic Circumstellar Modulation

Details Visual Versus Near-Infrared Variability of R For: Evidence for a Multiperiodic Circumstellar Modulation Visual Versus Near-Infrared Variability of R For: Evidence for a Multiperiodic Circumstellar Modulation

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....111.2391b&link_type=abstract

Astronomical Journal v.111, p.2391

Astronomy and Astrophysics

Astronomy

11

Stars: Individual: R Fornacis, Stars: Oscillations

Scientific paper

Long-term AAVSO visual observations and near-infrared data on the carbon-rich long-period variable star R For have been analyzed. We find that the Fourier development of the light curve depends on the observation wavelength. For most components-including the main one the amplitude decreases from the visible to the near-infrared. The most sensitive components to the band correspond or are related to frequencies that are close to subharmonics of the main periodicity. We propose that this may be the result of a multiperiodic modulation of the light curves due to circumstellar dust shells, as predicted by theoretical models.

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