IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Exploring the circumstellar disk-like structure of the B[e] supergiant LHA 120-S 73.
Autor/es:
TORRES, A. F.; CIDALE, L.; KRAUS, M.; ARIAS, M. L.; MARAVELIAS, G.; BORGES FERNANDES, M.; VALLVERDÚ, R.
Lugar:
La Plata
Reunión:
Congreso; 58° Reunión Anual de la Asociación Argentina de Astronomía; 2015
Institución organizadora:
FCAGLP (UNLP) - IALP (CONICET)
Resumen:
The Large Magellanic Cloud (LMC) hosts the peculiar B8-type star LHA 120-S 73. Belonging to the B[e] supergiant group, this star is surrounded by large amounts of material which forms a circumstellar disk-like structure, seen more or less pole-on. Within its dense and cool circumstellar disk, molecules form anddust condensates. Based on medium and high-resolution optical and infrared spectroscopic data, we study the structure, kinematics and physical properties of the disk using different tracers, as the emission lines of [O i] and[Ca ii ] for the innermost gaseous atomic region and the first-overtone bands of CO for the inner border of the molecular disk. We also analyze near-infrared mid-resolution spectra to search for the presence of other molecules and mid-infrared low-resolution spectroscopic observations to study the composition of the dust component.