| |
 |
| Paper: |
Extremely Precise Measurements of Stellar Diameters and Binary Stars with Coherent Integration |
| Volume: |
487, Resolving The Future Of Astronomy With Long-Baseline Interferometry |
| Page: |
303 |
| Authors: |
Jorgensen, A. M.; Mozurkewich, D.; Hutter, D. |
| Abstract: |
We discuss the status of coherent integration with the Navy
Prototype Optical Interferometer
(NPOI) Armstrong et al. (1998). Coherent integration relies on being
able to phase reference interferometric measurements, which in turn
relies on making measurements at multiple wavelengths. We first
discuss the generalized group-delay approach, then the meaning of
the resulting complex visibilities and then demonstrate how coherent
integration can be used to perform very precise measurement of
stellar diameters. The phase of the complex visibility is
particularly attractive as a data product because it is not biased
in the same way that visibility amplitudes are. We demonstrate how
single-baseline phases can be used to make accurate measurements of
magnitude differences and separations of binary stars. |
|
|
|
|
|
