Interferometric study of Betelgeuse in H band

Details Interferometric study of Betelgeuse in H band Interferometric study of Betelgeuse in H band

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..471h&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present 3 telescope interferometric observations of the super giant star Betelgeuse (Alpha Ori, M2Iab) using the IOTA/IONIC interferometer (Whipple Observatory, Arizona) in early October 2005. Since IOTA is a 3 telescope interferometer, we were able to make closure phase measurements which allow us to image the star with several pixels across the disk. We discuss the fondamental parameters of Betelgeuse such as diameter, limb darkening and effective temperature. For the first time at this spatial resolution in the H band, closure phases provide interesting insights on the features of the object since we detect a spot corresponding to 0.5% of the total received flux.

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