Science Highlights from Ground-Based O/IR Interferometers

Details Science Highlights from Ground-Based O/IR Interferometers Science Highlights from Ground-Based O/IR Interferometers

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.8209m&link_type=abstract

American Astronomical Society Meeting 210, #82.09; Bulletin of the American Astronomical Society, Vol. 39, p.191

Astronomy and Astrophysics

Astrophysics

Scientific paper

Ground-based optical/infrared long-baseline interferometry has come of age in the U.S. where several existing or planned facilities have produced remarkable scientific results demonstrating the power of the technique within a broad range of scientific applications. This paper presents brief overviews of the following facilities: the Palomar Testbed Interferometer (PTI) on Mt. Palomar, CA; the Navy Prototype Optical Interferometer (NPOI) located on Anderson Mesa near Flagstaff, AZ; the Keck Interferometer (KI) on Mauna Kea, HI; and the CHARA Array on Mt. Wilson, CA. Also described is the Magdalena Ridge Observatory Interferometer (MROI) to be built at the highest elevation of the Magdalena Mountains of New Mexico.
Example scientific highlights to date include: The first measurement of stellar rotational oblateness (Altair), the detection of Cepheid pulsations, and ultra-precise astrometry of binaries with PTI; the first six-telescope images (the triple system eta Virginis) and constraints on disk parameters of Be stars with NPOI; resolving the nucleus of NGC 4151 and probing the inner disk regions of YSOs with KI; and, the first direct detection of gravity darkening in single stars (Regulus), calibration of the Baade-Wesselink method for Cepheids, and the first direct measurement of the diameter of an exoplanet (the transit system HD 189733) using the CHARA Array. While the great majority of results to date have focused on stellar astrophysics, the MROI strives to have sensitivity sufficient to access a number of AGN.
Research with these independently operated facilities is sponsored by the California Institute of Technology and the Jet Propulsion Laboratory for PTI; the U.S. Naval Observatory and the Naval Research Laboratory for NPOI; the National Aeronautics and Space Administration for KI; and, the National Science Foundation and Georgia State University for the CHARA Array. Funding for MROI is administered through the Office of Naval Research.

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