R Coronae Borealis stars and planetary nebulae
1986; IOP Publishing; Volume: 307; Linguagem: Inglês
10.1086/164449
ISSN1538-4357
Autores Tópico(s)Astronomical Observations and Instrumentation
Resumoview Abstract Citations (22) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS R Coronae Borealis Stars and Planetary Nebulae Schaefer, B. E. Abstract IRAS observations of R Coronae Borealis type stars (R CrB's) suggests that a subset of these is inside planetary nebulae (PNs). In most cases, the PN is confirmed by the finding of a visible nebula around the star. These nebular R CrB's are identified as being the results of a final helium shell flash on the central star of old PNs. The majority of the R CrB's formed after the coalescence of a binary consisting of CO and He white dwarfs. Also presented in this paper are the results of a survey of 52 R CrB's. The normal R CrB's have power-law spectra which imply that the grain absorption coefficient varies linearly with frequency. It is estimated that R CrB's eject about 300 clouds per year, each of which subtend an angle of about 30 sq deg. Publication: The Astrophysical Journal Pub Date: August 1986 DOI: 10.1086/164449 Bibcode: 1986ApJ...307..644S Keywords: Infrared Astronomy; Peculiar Stars; Planetary Nebulae; R Coronae Borealis Stars; Variable Stars; Astronomical Catalogs; Power Spectra; Stellar Envelopes; Stellar Evolution; White Dwarf Stars; Astrophysics; INFRARED: SOURCES; NEBULAE: PLANETARY; STARS: CIRCUMSTELLAR SHELLS; STARS: EVOLUTION; STARS: R CORONAE BOREALIS full text sources ADS | data products SIMBAD (34)
Referência(s)