Optical and Infrared Colors of Massive Stars

M. LJUNGBERG; A. AHUMADA; M. GOMEZ

Córdoba

Congreso; FOF meeting 2019; 2019

IATE y Observatorio Astronómico de Córdoba

Using available data archives (such as 2MASS, WISE) as well as published catalogs, we investigate the location of different types of evolved massive stars (Wolf Rayet, blue luminous variables, long period variables, etc.) on optical and infrared color-color diagrams (such as B-V vs U-B, J-K vs V-J, W2-W3 vs W1-W2). For each type of evolved stars we find and define characteristic regions or locus where these objects are more frequently found. In some cases regions occupied by more than one type of objects are also found. We conclude that, in general, optical and infrared color-color diagrams allow an initial and fast classification of new candidate objects selected from large-area surveys. Follow-ups (usually spectroscopic observations) are required to finally confirm their preliminary classifications and/or disentangle two or more type of objects having similar colors.