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A dynamically discovered and characterized non-accreting neutron star-M dwarf binary candidate
Huang, Yang; Liu, Jifeng; Bai, Yu +26 more
Typically, neutron stars are discovered by observations at radio, X-ray or gamma-ray wavelengths. Unlike radio pulsar surveys and X-ray observations, optical time-domain surveys can unveil and characterize exciting but less explored non-accreting and/or non-beaming neutron stars in binaries. Here we report the discovery of such a neutron star cand…
γ Columbae as a recently stripped pulsating core of a massive star
Meynet, Georges; Przybilla, Norbert; Irrgang, Andreas
Stellar cores, that is, the central regions where densities and temperatures are high enough for nuclear fusion processes to take place, are usually covered by an opaque envelope. Only in very rare cases, stars may expose their cores, for example, when a tiny fraction of them evolve into Wolf-Rayet or helium hot subdwarf stars. However, for the va…
Polarization due to rotational distortion in the bright star Regulus
Bailey, Jeremy; Cotton, Daniel V.; Howarth, Ian D. +4 more
Polarization in stars was first predicted by Chandrasekhar1, who calculated a substantial linear polarization at the stellar limb for a pure electron-scattering atmosphere. This polarization will average to zero when integrated over a spherical star but could be detected if the symmetry was broken, for example, by the eclipse of a binar…