Title:Properties of Galactic FS CMa type objects, a new group of dust-forming systems.


Abstract:
The recently defined Galactic FS CMa group comprises nearly 40 not very luminous objects that 
significantly expanded the luminosity range of hot dust-forming stars. These objects exhibit 
extremely strong emission-line spectra and IR excesses, which are indicative of lack of cold dust. 
They are most likely binary systems that currently undergo or have recently undergone a phase of a 
rapid mass-exchange, associated with a strong mass loss and dust formation. We report recent 
results of our high-resolution optical spectroscopy as well as infrared spectroscopy, obtained with 
the Spitzer Space Telescope, along with those of initial modeling of the observed parameters. 
Complex structure of the objects\' circumstellar environments that significantly veiles the 
underlying stars requires multitechnique investigation, in which interferometry should play an 
important role.