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Infrared characteristics of the BIS catalog objects

Nesci, R.; Rossi, C.; Gaudenzi, S. +3 more

We studied several color-color infrared diagrams of the 276 late type stars of the BIS catalog. For 95 of these stars we derived spectral classification from our slit spectroscopy. From the 2MASS color diagram we concluded that none of the sample stars is a dwarf. The WISE 3.4-12 vs 12-22 plot is the best to discriminate the variability type (Mira…

Spectral Properties and Variability of BIS objects

Nesci, R.; Rossi, C.; Gaudenzi, S. +3 more

Through the analysis and interpretation of newly obtained and of literature data we have clarified the nature of poorly investigated IRAS point sources classified as late type stars, belonging to the Byurakan IRAS Stars catalog. From medium resolution spectroscopy of 95 stars we have strongly revised 47 spectral types and newly classified 31 sourc…