Water Observed in Red Giant and Supergiant Stars - Manifestation of a Novel Picture of the Stellar Atmosphere or else Evidence against the Classical Model Stellar Photosphere
نویسنده
چکیده
We detected the H2O 6.3 μm bands in more than 30 normal red giants stars from K5III to M8III as well as in some early M supergiants on the SWS spectra retrieved from the ISO Data Archive. This result, however, shows serious inconsistency with the present model photospheres which predict H2O only in the latest M (super)giant stars. Also H2O was once discovered in the early M (super)giant stars nearly 40 years ago with the balloon-borne telescope named Stratoscope II. This discovery was so unexpected at that time that it was not understood correctly and overlooked for a long time. Now, we reflect on our ignorance of this important discovery during the 40 years and should consider more seriously the meaning of the rediscovery of water in so many red (super)giant stars
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