The Chromaticity of Microlensing (Surface Imaging of Stars)

Details The Chromaticity of Microlensing (Surface Imaging of Stars) The Chromaticity of Microlensing (Surface Imaging of Stars)

1997-02-20

arxiv.org/abs/astro-ph/9702180v1

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, LaTex, invited talk 12th IAP Colloquium on "The Astrophysical Returns of Microlensing Surveys", eds. R.Fer

Scientific paper

Gravitational microlensing is not achromatic when the star being microlensed is resolved by the lens. We show how narrow-band photometry and moderate- to high-resolution spectroscopy can be used to reconstruct the stellar surface intensity distribution of a microlensed star. Such microlens imaging can provide a unique opportunity to study the surfaces of normal red giants where Doppler imaging is not applicable due to slow rotation.}

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