An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
Spinning up an extragalactic neutron star Ultraluminous x-ray sources (ULXs) are strange objects in other galaxies that cannot be explained by conventional accretion onto stellar-mass objects. This has led to exotic interpretations, such as the long-sought intermediate-mass black holes. Israel et al. observed a ULX in the nearby galaxy NGC …