The ``Invisible'' Optical Counterparts of Radio Pulsars: Isolated Neutron Stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Thirty years after their discovery, our understanding of isolated neutron stars at wavelengths outside radio is restricted to only a dozen (out of over 1000) long period radio pulsars with known optical counterparts. Neutron stars have important implications for many astrophysical processes. They currently provide the only opportunity to test general relativity in the strong gravitational field regime and to study matter at very high densities. Spectral energy distributions from multicolor photometry of neutron stars can be used to derive information about their temperatures, sizes, magnetic field strengths, and/or atmospheric compositions. The neutron star cooling curve can differentiate between models of their interior structure and composition, and even between various proposed equations of state of nuclear matter. We will use the CTIO 4-m to obtain deep (V=25--26) images at the positions of recently discovered pulsars to detect their optical counterparts.

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