Calibration Observations of Fomalhaut with the VLTI

• Main Authors: Davis, J, Richichi, A, Ballester, P, Gitton, Ph, Glindemann, A, Morel, S, Schoeller, M, Wittkowski, M, Paresce, F
• Format: Journal Article
• Language: English
• Published: 26-10-2004
• Subjects: Physics - Astrophysics of Galaxies; Physics - Cosmology and Nongalactic Astrophysics; Physics - Earth and Planetary Astrophysics; Physics - High Energy Astrophysical Phenomena; Physics - Instrumentation and Methods for Astrophysics; Physics - Solar and Stellar Astrophysics
• DOI: 10.48550/arxiv.astro-ph/0410625

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.