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2024

Seeking the nearest neutron stars using a new local electron density map

Bramante, Joseph, Mack, Katherine, Raj, Nirmal et al.

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Neutron stars provide a compelling testing ground for gravity, nuclear dynamics, and physics beyond the Standard Model, and so it will be useful to locate the neutron stars nearest to Earth.

To that end, we revisit pulsar distance estimates extracted from the dispersion measure of pulsar radio waves scattering on electrons.
In particular, we create a new electron density map for the local kiloparsec by fitting to parallax measurements of the nearest pulsars, which complements existing maps that are fit on the Galactic scale.
This ``near-Earth'' electron density map implies that pulsars previously estimated to be 100-200 pc away may be as close as tens of parsecs away, which motivates a parallax-based measurement campaign to follow-up on these very-near candidate pulsars.

Seeking the nearest neutron stars using a new local electron density map · Around

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