Program: GN-2008B-Q-100

Be stars are early-type rapid rotators with emission lines originated in a circumstellar envelope. The variability present in lines of these stars can be explained with different envelope models. Our aim is to study the structure of the circumstellar matter close to the central star by means of IR lines. Due to the sensitivity of Hydrogen IR lines to changes in the physical properties of their forming regions, they are useful to study the presence of high temperature regions and high density structures. From the study of the intensity of hydrogen L-band lines, we have found that Be stars can be classified in different categories, objects belonging to each group seem to have line forming regions with the same physical conditions. We have also found that the inner part of the circumstellar envelope around these stars contributes to their IR emission. Thus, by means of new IR spectroscpic observations we expect to broaden our knowledge on the innermost circumstellar environment of Be stars.