The distance to the Orion Nebula
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany e-mail: [kmenten;brunthal]@mpifr-bonn.mpg.de
2 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA e-mail: [reid;jforbrich]@cfa.harvard.edu
Accepted: 22 August 2007
We have used the Very Long Baseline Array to measure the trigonometric parallax of several member stars of the Orion Nebula Cluster showing non-thermal radio emission. We have determined the distance to the cluster to be pc. Our distance determination allows for an improved calibration of luminosities and ages of young stars. We have also measured the proper motions of four cluster stars which, when accurate radial velocities are measured, will put strong constraints on the origin of the cluster.
Key words: stars: pre-main sequence / radio continuum: stars / techniques: interferometic / astrometry
© ESO, 2007