The 2200 A circumstellar dust absorption feature in the spectra of three bright RV Tauri stars

Abstract

view Abstract Citations (17) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The 2200 A circumstellar dust absorption feature in the spectra of three bright RV Tauri stars. Baird, S. R. ; Cardelli, J. A. Abstract IUE observations of the 2200 A absorption feature of circumstellar dust were made of the three RV Tauri stars AC Her, U Mon, and R Sct. U Mon was found to have a dust shell with a much lower column density at 2200 A than R Sct and possibly AC Her, requiring U Mon to have a much more extended dust shell than R Sct to account for its greater infrared excess. AC Her and R Sct were observed twice, at different phases of their cycles, and no major change in the 2200 A absorption feature with phase was detected. Such a change would have supported the idea that the slight polarization of these stars' visual light is caused by the circumstellar dust. Publication: The Astrophysical Journal Pub Date: March 1985 DOI: 10.1086/163026 Bibcode: 1985ApJ...290..689B Keywords: Absorption Spectra; Cosmic Dust; Stellar Envelopes; Stellar Spectra; Supergiant Stars; Ultraviolet Absorption; Variable Stars; Interstellar Extinction; Iue; Particle Density (Concentration); Polarization Characteristics; Stellar Luminosity; Stellar Spectrophotometry; Astrophysics full text sources ADS | data products SIMBAD (3) MAST (1) INES (1)