Cosmic Heavyweight: Neutron Star Sets Mass Record ⚡ экспресс
New photometric observations at orbital minimum and a revised fit of radial-velocity curves have refined the neutron star mass in the pulsar PSR J0952-0607: M_NS = 2.35±0.11 M_⊙. Given its rapid rotation and unusually low magnetic field, the star underwent an atypical evolution, likely linked to high mass, which now exceeds by 2.5σ the mass of the heaviest pulsar with a white-dwarf companion measured via the Shapiro delay method. The refined mass value raises the maximum neutron star mass (Tolman–Oppenheimer–Volkoff limit) to M_TOV > 2.27 M_⊙ (2.12 M_⊙) at 1σ (3σ) confidence, placing tighter constraints on the equation of state for dense matter. The statistical error has decreased, systematic effects are presumably small, but uncertainties remain. Sources of residual errors and opportunities for further measurement improvements are discussed.
In a dance with an ordinary star, astronomers have found a true heavyweight—a neutron star with 2.35 times the mass of the Sun. That's more than any other whose mass has been precisely measured. These objects are born when a star explodes as a supernova and its core collapses into a city-sized sphere. Just a little more mass, and the heavyweight would punch through the floor, collapsing into a black hole—the edge lies at about 2.27 solar masses. To weigh the invisible companion, scientists used brightness measurements and spectral analysis. By tracking the shift in spectral lines—an effect discovered by Christian Doppler—they calculated the orbital speed of the visible star, which revealed the wobbles caused by the heavyweight's gravity. The first neutron stars—pulsars—were spotted by Jocelyn Bell Burnell, and Fritz Zwicky predicted them back in the 1930s. This record shrinks the mystery: how matter resists pressures billions of billions of times stronger than Earth's. Inside such a star, a teaspoon of matter weighs as much as Mount Everest, yet it flows like a frictionless fluid. Knowing the mass limit lets us understand when the heavyweight finally snaps.
🎯 A teaspoon of neutron star stuff weighs about 10 billion tons—roughly a miniature Mount Everest.
🎬 The concept of neutron stars inspired science fiction writer Robert Forward to write 'Dragon's Egg,' in which exotic life evolves on such an object.