IRAS observations of R Coronae Borealis - Detection and study of a fossil shell
1986; IOP Publishing; Volume: 310; Linguagem: Inglês
10.1086/164738
ISSN1538-4357
AutoresF. C. Gillett, D. E. Backman, C. Beichman, G. Neugebauer,
Tópico(s)Astrophysics and Star Formation Studies
Resumoview Abstract Citations (77) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS IRAS Observations of R Coronae Borealis---Detection and Study of a Fossil Shell Gillett, F. C. ; Backman, D. E. ; Beichman, C. ; Neugebauer, G. Abstract IRAS observations reveal a ≡18arcmin diameter, nearly symmetrical 60 and 100 μm emission region centered on the extreme hydrogen-deficient supergiant, R CrB. If R CrB is at a distance of 1.6 kpc, the shell has a linear extent of ≡8 pc, and luminosity of about 28 L_sun;. The dust temperature is 25 - 30K, and the radiating dust mass is 0.1×10-2M_sun; to 2.4×10-2M_sun;, depending on the assumed grain optical properties. The corresponding total shell mass, for solar abundances, is at least 0.25 M_sun;. The dust shell is tentatively identified as a fossil remnant of R CrB's hydrogen-rich envelope. The ejection process appears to have occurred with a nearly constant mass loss rate and expansion velocity over a period of about 1.5×105yr, terminating about 2.6×104yr ago. Publication: The Astrophysical Journal Pub Date: November 1986 DOI: 10.1086/164738 Bibcode: 1986ApJ...310..842G Keywords: Infrared Stars; R Coronae Borealis Stars; Spaceborne Astronomy; Stellar Envelopes; Stellar Evolution; Stellar Spectrophotometry; Supergiant Stars; Emission Spectra; Infrared Astronomy Satellite; Interstellar Matter; Radiant Flux Density; Stellar Luminosity; Stellar Models; Astrophysics; INFRARED: SOURCES; INTERSTELLAR: GRAINS; STARS: CIRCUMSTELLAR SHELLS; STARS: R CORONAE BOREALIS full text sources ADS | data products SIMBAD (1)
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