Spectroscopic studies of compact binary millisecond pulsars (‘spiders’) are crucial for finding the most massive neutron stars. Using the largest ground-based optical telescopes to take spectra of spider binaries over their orbits, we can measure the radial velocity of their companion stars, which are bright in optical wavelengths, to weigh their neutron stars, which are…
Compact binary millisecond pulsars, also known as “spiders”, host the most massive neutron stars ever observed to date. Expanding the currently known spider population holds the key to determining the maximum neutron star mass, which has crucial implications for astrophysics, nuclear physics and gravitational wave astronomy. Searching for the variable optical emission of their companions…
Compact binary millisecond pulsar systems can host some of the most massive neutron stars. These rapidly rotating neutron stars are orbited by a much less massive companion star, which can be heated by high energy particles from the pulsar wind, causing it to become irradiated. This, along with additional sources of heating from the surface…
Pulsar radio emission, associated with rapidly spinning neutron stars, enables the estimation of their distances in the Galaxy through dispersion measure (DM). The DM quantifies the dispersive delay experienced by electromagnetic radiation as it traverses ionized matter, such as the interstellar medium (ISM). By measuring this delay across a range of frequencies, astronomers can obtain…
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