Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347420e&link_type=abstract
American Astronomical Society, AAS Meeting #213, #474.20; Bulletin of the American Astronomical Society, Vol. 41, p.431
Mathematics
Logic
Scientific paper
During the last 10-15 years, long-baseline optical interferometry (LBOI) has benefited from increased sensitivity, spatial resolution, and spectral resolution. For example, the diameters and asymmetries of single stars have been measured, the orbits of multiple stars have been imaged/modeled and their fundamental stellar parameters and evolutionary states determined, Be star disks have been fitted, and AGN nuclei have been resolved. Optical polarimetry has also yielded excellent astrophysics. Results include characterizing the atmospheres and shells of red giants/supergiants, modeling AGB star envelopes, studying Be star morphologies, and monitoring the short- and long- term behavior of AGNs.
A next logical step in instrumentation is to combine LBOI with polarimetry, which is called optical interferometric polarimetry (OIP). In other words, coherence is measured as a function of spatial extent and polarization state. Polarizing structures will be spatially resolved with OIP, providing new and exciting science in the fields of stellar and extra-galactic astronomy.
We expect that a national LBOI facility consisting of a significant number of large telescopes will be built in the United States within the next 10-20 years. To that end, we present in this poster: 1) examples of scientific applications for OIP, including YSO disks, stellar atmospheres, Be stars, interacting binaries, and Seyfert galaxies; and 2) simulations of instrumental polarization calibration and coherent averaging performance.
Elias Nicholas M. II
Jones Carol E.
Jorgensen Anders Moller
Schmitt Henrique R.
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