Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasj...42..441n&link_type=abstract
Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 42, no. 3, 1990, p. 441-457.
Astronomy and Astrophysics
Astronomy
24
Carbon Stars, Emission Spectra, Infrared Spectra, Silicates, Stellar Spectra, Astronomical Photometry, Infrared Astronomy Satellite, Near Infrared Radiation, Spectrum Analysis
Scientific paper
Near-infrared photometry was carried out for 15 carbon stars, including three peculiar carbon stars (BM Gem, V778 Cyg, and EU And) which have a 10-micron emission feature similar to the silicate emission characteristic of oxygen-rich stars. It was found that these carbon stars with silicatelike emission have excesses at both the 12- and 25-micron bands regarding IRAS photometric data which are characteristic of M-type stars with strong silicate emission features. This fact supports the suggestion that the silicatelike emission in peculiar carbon stars is the same as the silicate emission in M-type stars. The near-infrared spectra of these three peculiar carbon stars between 1.9 micron and 4.2 microns were obtained with a grating spectrometer. The spectra of these stars show a 3-micron absorption feature characteristic of carbon stars.
Hamada Hiroyuki
Matsuo Hiroshi
Murakami Hiroshi
Noda Manabu
Noguchi Kunio
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