Other
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240..689l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Oct. 1, 1989, p. 689-700.
Other
33
Astronomical Photometry, R Coronae Borealis Stars, Hydrogen, Interstellar Extinction, Radial Velocity, Stellar Color
Scientific paper
Observations of the recently identified R Coronae Borealis star NSV 6708 are discussed. The available photometry of this object reveal low-amplitude variations of period 110 d for 1.5 cycles before the star entered a 7-mag amplitude decline. The decline was similar to the 1985 decline of the class prototype R CrB in that the colors of the star were observed to redden from the onset of the decline. The reddening resembles interstellar reddening, indicating that the obscuring dust has extinction properties similar to that of interstellar dust. Spectra of NSV 6708 show much stronger hydrogen lines than in published spectra of other R CrB stars, but it is indicated that NSV 6708 may not be unique in this respect.
Cottrell Peter L.
Lawson Warrick A.
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