TY  - GEN
KW  - MYSO 
KW  -  fringe tracker
Y1  - 2011///
TI  - The atmospheric piston simulator for LINC-NIRVANA and Interferometric observations of massive young stellar objects
ID  - heidok12731
A1  - Follert, Roman
N2  - The scope of this dissertation is two - fold. The first part describes the design, construction and verification of the atmospheric piston simulator. The atmospheric piston simulator is a device which will allow the verification of the LINC-NIRVANA fringe tracking system under as realistic as possible conditions. The design of the atmospheric fringe tracker is based on optical fibers for light guiding and integrated optics components for the manipulation of the phase of the transmitted light. This fiber based setup allows on the one hand an easy an reliable way to introduce differential piston sequences, on the other hand integration into LINC-NIRVANA will be trivial. The second part of this dissertation describes the application of Interferometry in the case of the observation of massive young stellar objects. Two objects are presented and discussed in detail: the Kleinmann & Wright object and AFGL 2136. The interferometric measurements as well as the data reduction are described. The spectrally dispersed visibility curves and the differential phase data are fitted by analytical geometrical models. Then, the interferometric data and results from a spectral energy distribution analysis are combined and compared to Monte-Carlo radiative transfer simulations. The results of this analysis indicate the existence of circumstellar disks similar to those found in low mass star formation. A detailed analysis of the mid-infrared silicate absorption features also indicates significant dust grain evolution in AFGL 2136.
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/12731/
AV  - public
ER  -