Diffracto-Astrometry of The Orion Trapezium

Details Diffracto-Astrometry of The Orion Trapezium Diffracto-Astrometry of The Orion Trapezium

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011rmxac..40..282o&link_type=abstract

XIII Latin American Regional IAU Meeting (Eds. W. J. Henney & S. Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (

Astronomy and Astrophysics

Astronomy

2

Astrometry, Stars: Kinematics And Dynamics, Open Clusters And Associations, Techniques: High Angular Resolution, Techniques: Image Processing

Scientific paper

The Diffracto-Astrometry technique arises as a continuation of the work done by Allen et al. (1974, 2004) about the internal motions of Trapezium-type systems. Applying this technique to a 12 year period (1995-2007) Orion Trapezium images from the public database of the Hubble Space Telescope (HST) Wide Filed Planetary Camera 2 (WFPC2), it is possible to obtain high precision astrometric results (Sánchez et al. 2008). Thus we add new measurements to the historic data compilation (1832-2007) and determine relative motions and transversal velocities for some Trapezium components.

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