How big is a neutron star? These extreme, ultra-dense collapsed stars are fairly small, as far as stellar objects are concerned. Even though they pack the mass of a full-sized star, their size is often compared to the width of a medium-to-large-sized city. For years, astronomers have pegged neutron stars at somewhere between 19-27 km (12 to 17 miles) across. This is quite actually quite precise, given the distances and characteristics of neutrons stars. But astronomers have been working to narrow that down to an even more precise measurement.
An international team of researchers has now done just that. Using data from several different telescopes and observatories, members of the Max Planck Institute for Gravitational Physics, theAlbert Einstein Institute (AEI) have narrowed the size estimates for neutron stars by a factor of two.
Dr. Venemans is a research staff scientist working at the Max Planck Institute for Astronomy (MPIA) in Heidelberg, Germany. His research topics include the discovery of black holes in the early Universe, the characterisation of the galaxies hosting these distant black holes, the Epoch of Reionisation and the galaxy environment of active galaxies.