Astronomy Reports

, Volume 51, Issue 6, pp 481-485

First online:

Observable effects during gravitational microlensing of stars by NUT objects

  • M. B. BogdanovAffiliated withChernyshevsky State University
  • , A. M. CherepashchukAffiliated withSternberg Astronomical Institute

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We consider observable effects during the gravitational microlensing of stars of finite angular size with a given brightness distribution across their disks by exotic objects whose space-time environment is described with the NUT metric. We demonstrate that, under certain conditions, the microlensing light curves and chromatic effects due to the wavelength dependence of the disk brightness distributions can differ considerably from those observed for a Schwarzschild gravitational lens, so that their analysis can facilitate the identification of such objects.

PACS numbers

95.30.Sf 98.62.Sb 95.35.+d 97.10.Ri