Activities

 The ARG aims to contribute to the following areas in the study of star-forming regions:

  • the collection of observational information required to establish more realistic theoretical models for the distribution in phase space of the stars and the interstellar mass in a star forming region;
  • improvement of existing software for the reduction of observational data (in particular echelle spectra);
  • improvement of precision (minimizing random errors) and accuracy (minimizing systematic errors) in the measurement of radial velocities of early-type stars; 
  • expansion of the existing set of early-type radial-velocity standards stars; 
  • the gravitational dynamics of open clusters, in particular those phenomena which are characteristic for systems with a relatively small number (100 to 1000) of masspoints;
  • the creation of software for numerical simulation of the evolution and for the interpretation of the results thereof
  • application of advanced statistical techniques for parametric and non-parametric estimation of probability densities in the interpretation of observational data.

We are also studying the multiplicity of members of the Sco-Cen association using data from the HIPPARCOS astrometric mission and from dedicated spectroscopic observations.

Finally, The ARG is involved in the astrometric ESA-mission (GAIA) which was launched on 19th Dec. 2013.

 

Key Words: stellar dynamics, interstellar medium, radial velocities, early-type stars.