Diameters of Mira Stars Measured Simultenously in the J,H,K' Near-Infrared Bands

Details Diameters of Mira Stars Measured Simultenously in the J,H,K' Near-Infrared Bands Diameters of Mira Stars Measured Simultenously in the J,H,K' Near-Infrared Bands

2004-11-02

arxiv.org/abs/astro-ph/0411073v1

Astrophys.J. 620 (2005) 961-969

Astronomy and Astrophysics

Astrophysics

to appear in ApJ 20 February 2005 issue

Scientific paper

10.1086/427163

We present the first spatially resolved observations of a sample of 23 Mira stars simultaneously measured in the near-infrared J, H and K' bands. The technique used was optical long baseline interferometry, and we present for each star visibility amplitude measurements as a function of wavelength. We also present characteristic sizes at each spectral band, obtained by fitting the measured visibilities to a simple uniform disk model. This approach reveals the general relation J diameter < H diameter < K' diameter.

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