Mid-infrared variations of R Coronae Borealis stars

摘要: Mid-infrared photometry of R Coronae Borealis stars obtained from various satellites IRAS to WISE has been utilized in studying the variations circumstellar dust's contributions spectral energy distribution these stars. The variation fractional coverage (R) dust clouds and their blackbody temperatures (T$_d$) have used trying understand cloud evolution over three decades spanned by satellite observations. In particular, it is shown that a prediction $ \propto T_d^4$ developed this paper satisfied, especially those for which single collection dominates IR fluxes. Correlations with photospheric abundance luminosity are explored.