Microlensing pulsars

Details Microlensing pulsars Microlensing pulsars

2009-12-07

arxiv.org/abs/0912.1167v4

Mon. Not. R. Astron. Soc. 405, 2754-2758, 2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

5pages, 2figures

Scientific paper

We investigate the possibilities that pulsars act as the lens in gravitational microlensing events towards the galactic bulge or a spiral arm. Our estimation is based on expectant survey and observations of FAST (Five hundred meter Aperture Spherical Telescope) and SKA (Square Kilometer Array), and two different models of pulsar distribution are used. We find that the lensing rate is > 1 event/decade, being high enough to search the real events. Therefore, the microlensing observations focusing on pulsars identified by FAST or SKA in the future are meaningful. As an independent determination of pulsar mass, a future detection of microlensing pulsars should be significant in the history of studying pulsars, especially in constraining the state of matter (either hadronic or quark matter) at supra-nuclear densities. The observations of such events by using advanced optical facilities (e.g., the James Webb Space Telescope and the Thirty Meter Telescope) in future are highly suggested.

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