Abstract
Concerning the separation of disk Miras and Semiregular variables using just DENIS and IRAS data I refer to the paper by Hron & Kerschbaum in this volume. For those stars for which at least IRAS 12µm fluxes are available, (K-[12]) is a good selection criterion, otherwise (I-K) is reasonably useful. Contamination by the expected large number of M dwarfs should not be a problem because these stars will be found at much fainter K magnitudes than the galactic AGB stars. However, the bluest of the AGB variables will be indistinguishable from the non-variable M giants, both in their colours and their apparent magnitudes. (H-K) should probably allow a good distinction between Miras and Semiregulars (see e.g. Kerschbaum & Hron, A&A in press), even if one considers the scatter in this colour index due to variability.
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© 1994 Springer Science+Business Media Dordrecht
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Hron, J. (1994). Strategy of Infrared Surveys for Studying Galactic Evolved Stars and Their Subclasses. In: Epchtein, N., Omont, A., Burton, B., Persi, P. (eds) Science with Astronomical Near-Infrared Sky Surveys. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0946-8_36
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DOI: https://doi.org/10.1007/978-94-011-0946-8_36
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