Interferometric Narrow-Angle Astrometry: Theory and Data Analysis

Andy Boden (California Institute of Technology)

Abstract:

In my talks I will illustrate the motivations, context, and methodologies associated with performing narrow-angle astrometry with ground-based optical interferometers. Narrow-angle astrometry in general is a set of techniques that are sensitive to apparent non-inertial motions of celestial objects, and has traditionally been used to measure relative trigonometric parallax, and infer gravitational associations among objects. Modern long-baseline astrometric methods have the potential of being sufficiently precise as to compliment spectroscopic radial velocity techniques as probes of the dynamics of nearby stars.

Narrow Angle Astrometry
Realaudio of lecture.
Viewgraphs PDF 1936k Bytes.

Data Reduction for Narrow Angle Astrometry
Realaudio of lecture.
Viewgraphs PDF 1336k Bytes.

References:

• Potential of long-baseline infrared interferometry for narrow angle astrometry
  Astron. Astrophys. 262, 353-358 (1992)

• Ground-Based Narrow Angle Astrometry
  M. Mark Colavita, Chapter 11 in Principles of Long Baseline Stellar Interferometry, P.R. Lawson, ed. JPL Publication 00-9 (JPL Publications: Pasadena, California, 2000).