Late-type giants and supergiants in the galactic center

Astronomy and Astrophysics – Astronomy

Scientific paper

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Absorption Spectra, Galactic Nuclei, Giant Stars, Infrared Radiation, Late Stars, Supergiant Stars, Carbon Monoxide, Milky Way Galaxy, Nonthermal Radiation, Radio Sources (Astronomy), Stellar Atmospheres

Scientific paper

An absorption feature at 2.3 microns attributed to CO molecules in stellar atmospheres has been found in some, but not all, of the infrared sources within 20 arcsec of the galactic center. The absorption is characteristic of that found in M-type giant and supergiant stars. The infrared source coincident with the sub-arcsecond nonthermal radio source does not show CO absorption.

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