Observation of atmospheric time variation of Mira stars using Interferometry

Details Observation of atmospheric time variation of Mira stars using Interferometry Observation of atmospheric time variation of Mira stars using Interferometry

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...5e..14l&link_type=abstract

Calibrating the Top of the Stellar M-L Relation, 26th meeting of the IAU, Joint Discussion 5, 16 August 2006, Prague, Czech Repu

Computer Science

Scientific paper

Interferometric data of Mira type stars in the near-infrared have already produce radial visibility curves with a shape far from simple limb darkening profile. The measured visibilities as a function of wavelength revealed the presence in K band of a close ( at a ~ 1 stellar radius distance above the photosphere ) molecular layer. However, thanks to the phase closure and telescope mobility of the IOTA interferometer, we have now access to the two dimensional complex visibility profile. We will present the u-v plane of different Mira stars at different epochs, and we will discuss the problems and advantages of analyzing complex objects in the Fourier domain.

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