Multi-wavelength visibility measurements of the red giant R Doradus

Details Multi-wavelength visibility measurements of the red giant R Doradus Multi-wavelength visibility measurements of the red giant R Doradus

2000-05-09

arxiv.org/abs/astro-ph/0005195v1

Astronomy and Astrophysics

Astrophysics

8 pages; SPIE Conf. 4006 "Interferometry in Optical Astronomy"

Scientific paper

We present visibility measurements of the nearby Mira-like star R Doradus taken over a wide range of wavelengths (650--990 nm). The observations were made using MAPPIT (Masked APerture-Plane Interference Telescope), an interferometer operating at the 3.9-m Anglo-Australian Telescope. We used a slit to mask the telescope aperture and prism to disperse the interference pattern in wavelength. We observed in R Dor strong decreases in visibility within the TiO absorption bands. The results are in general agreement with theory but differ in detail, suggesting that further work is needed to refine the theoretical models.

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