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Paper   IPM / P / 7871
School of Physics
  Title:   Gravitational Microlensing by Rotating Stars
1.  H. Ebrahimnejad Rahbari
2.  M. Nouri-Zonoz
3.  S. Rahvar
  Status:   Preprint
  Year:  2005
  Supported by:  IPM
Using astrometric measurements of microlensing we study the effect of angular momentum as compared to that of the parallax. For a rotating object it is shown that the effect of the angular momentum deviates the center of images from the simple standard microlensing. This effect could be observed by future astrometric missions such as GAIA and SIM for lenses with angular momentum S >~×1048 kg m2 sec−1. We show how the angular momentum detection is sensitive to the lens parameters and argue that low mass lenses with a given angular momentum have a higher chance to be detected.

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