Calibration Observations of Fomalhaut with the VLTI

Details Calibration Observations of Fomalhaut with the VLTI Calibration Observations of Fomalhaut with the VLTI

2004-10-26

arxiv.org/abs/astro-ph/0410625v1

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, uses an.cls, accepted for publication in Astron. Nacht

Scientific paper

10.1002/asna.200410339

An investigation of the stability of the transfer function of the European Southern Observatory's Very Large Telescope Interferometer has been carried out through observations of Fomalhaut over a wide range in hour angle. No significant variation in the transfer function was found for the zenith angle range 5-70 degrees. The projected baseline varied between 139.7 m and 49.8 m during the observations and, as an integral part of the determination of the transfer function, a new accurate limb-darkened angular diameter for Fomalhaut has been established. This has led to improved values for the emergent flux, effective temperature, radius and luminosity.

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