Seminars 2017
04.01.2017 14:00
Michal Zajaček
I. Institute of Physics, University of Cologne, Germany
What have we learned from the observations of the NIR-excess source DSO/G2 in the Galactic centre?
Abstract
Michal Zajaček
What have we learned from the observations of the NIR-excess source DSO/G2 in the Galactic centre?
The Dusty S-cluster Object (DSO/G2) orbiting the supermassive black hole (Sgr A*) in the Galactic centre has been monitored in both near-infrared continuum and line emission. There has been a continued discussion about the character of the object: interpreting it as either a core-less gas cloud or a dust-enshrouded star. A recent analysis of polarimetry data in K_s-band (2.2 μm) by Shahzamanian et al. (2016) allows us to put further constraints on the geometry of the DSO. I will present our recent results of the radiative transfer modelling, including NIR polarized continuum, and discuss possible models of the DSO/G2 in the context of Galactic centre stellar populations.
