Photometry of some carbon stars in the 1-2.5-micron range

Details Photometry of some carbon stars in the 1-2.5-micron range Photometry of some carbon stars in the 1-2.5-micron range

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978afz....14..645k&link_type=abstract

Astrofizika, vol. 14, Nov. 1978, p. 645-650. In Russian.

Astronomy and Astrophysics

Astronomy

2

Carbon Stars, Infrared Astronomy, Near Infrared Radiation, Stellar Spectrophotometry, Abundance, Astronomical Catalogs, Correlation, Graphite, Stellar Envelopes

Scientific paper

Results are reported for intermediate-band near-IR photometry of eight carbon stars at wavelengths of 0.96, 1.04, 1.54, 1.72, 1.75, 1.98, 2.02, 2.17, 2.23, and 2.39 microns. The stars observed include VY UMa, SS Vir, RR Her, RY Dra, N 1343, HK Lyr, T Lyr, and V Aql. Six of these stars are found to exhibit temperature-independent IR excesses, the intensity of which increases with increasing relative carbon abundance. It is suggested that circumstellar dust shells are the most likely cause of the IR excesses and that these shells were formed by mass ejection rather than graphite-grain condensation in the carbon-star atmospheres.

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