Imaging the spotty surface of Betelgeuse in the<i>H</i>band
Imaging the spotty surface of Betelgeuse in the<i>H</i>band
<i>Aims. <i/>This paper reports on <i>H<i/>-band interferometric observations of Betelgeuse made at the three-telescope interferometer IOTA. We image Betelgeuse and its asymmetries to understand the spatial variation of the photosphere, including its diameter, limb darkening, effective temperature, surrounding brightness, and bright (or dark) star spots.<i>Methods. <i/>We used different theoretical simulations …