TY  - GEN
KW  - Protoplanetary discs 
KW  -  Star formation 
KW  -  Planet formation 
KW  -  OB association
Y1  - 2010///
ID  - heidok10602
AV  - public
TI  - Multi-wavelength studies of protoplanetary discs
N2  - The early evolutionary stages of a pre-main sequence star are characterised  by the formation of a dense accretion disc. These discs provide the environment and material in and from which planets are expected to form.  At this epoch circumstellar material is accreting  onto the central star, while small dust grains in the disc interior coagulate into larger objects and gravitationally settle into the mid-plane. These are the first steps of planet formation. The study of the dust properties (e.g. grain size distribution, dissipation timescale) in protoplanetary discs is then fundamental to understand how planets form.  In this thesis I present three works aimed at studying the formation,  dissipation and long term evolution of protoplanetary discs, respectively. The first project investigates the properties of the young binary  system Haro~6-10. I present the results of multi-wavelength high spatial resolution observations of Haro 6-10 aimed at  characterising the large- and small-scale structures of the binary system. The second project is a combined infrared (Spitzer/IRAC) and X-ray (Chandra/ACIS) survey of the OB association IC~1795. This program is aimed at studying the evolution of protoplanetary discs in regions of massive star formation.  The last project is the deepest single dish millimetre survey of debris discs around solar-type stars to date. The aim of this work is to study the evolution of the debris dust mass with time and to characterise the structure of these discs.
A1  - Roccatagliata, Veronica
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/10602/
ER  -