NOAO >   Observing Info >   Approved Programs >   2010B-0096

Small NOAO Logo

Proposal Information for 2010B-0096


PI: Brian D. Mason, US Naval Observatory, bdm@usno.navy.mil
Address: Astrometry, 3450 Massachusetts Avenue NW, Washington, DC 20392, USA

CoI: Andrei Tokovinin, CTIO
CoI: William I. Hartkopf, US Naval Observatory
CoI: Douglas R. Gies, Georgia State University
CoI: Jennifer Patience, University of Exeter

Title: Stellar Multiplicity and Masses

Abstract: Double stars are an essential (and frequently neglected) pillar of the astronomical infrastructure providing direct measurements of stellar masses and a wealth of other data. Current knowledge of visual orbits is based on historic heritage, often of inadequate quality. Modern speckle interferometry reaches higher resolution, accuracy, and contrast, but needs regular monitoring of orbital motion through repeated measurements. Observations of ~500 pairs obtained in this program will contribute to the improvement of visual orbits and will increase their number. In turn, this will refine the binary statistics (distributions of elements), permit dynamical analysis of multiple stars, prepare ground of future space missions by disentangling orbital motion from astrometric solutions, and enable complementary studies by spectroscopy and long-baseline optical interferometry.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2010B-0096

noaoprop-help@noao.edu

Small NOAO Logo