2014/12/24 by N. Kameswara Rao, David L. Lambert · 7 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Black-body radiation #Circumstellar dust #Galaxy #Gamma-ray bursts and supernovae #Infrared #Infrared excess #Luminosity #Molecular cloud #Photometry (optics) #Physics #Radiation #Spectral energy distribution #Stars #Stellar, planetary, and galactic studies #T Tauri star #Variation (astronomy) #astro-ph.SR
paper · pdf · doi:10.1093/mnras/stu2748
published in Monthly Notices of the Royal Astronomical Society 447(4), 3664-3677 (Oxford University Press) · 15 pages, 15 figures, accepted in MNRAS
arxiv created 2014/12/24 · openalex publication_date 2015/01/29 · arxiv updated 2015/06/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Mid-infrared (IR) photometry of R Coronae Borealis stars obtained from various satellites from Infrared Astronomical Satellite (IRAS) to Wide-field Infrared Survey Explorer (WISE) has been utilized in studying the variations of the circumstellar dust's contributions to the spectral energy distribution of these stars. The variation of the fractional coverage (R) of dust clouds and their blackbody temperatures (Td) have been used in trying to understand the dust cloud evolution over the three decades spanned by the satellite observations. In particular, it is shown that a prediction |R ∝ T\rm d4| developed in the paper is satisfied, especially by those stars for which a single collection of clouds dominates the IR fluxes.