An ultraluminous X-ray source powered by an accreting neutron star

@article{Bachetti2014AnUX,
  title={An ultraluminous X-ray source powered by an accreting neutron star},
  author={Matteo Bachetti and Fiona A. Harrison and Dominic J. Walton and Brian W. Grefenstette and Deepto Chakrabarty and Felix S. F{\"u}rst and Didier Barret and Andrei M. Beloborodov and Steven E. Boggs and F. E. Christensen and Walter Craig and Andrew C. Fabian and Charles James Hailey and A Hornschemeier and Victoria M. Kaspi and Shrinivas R. Kulkarni and Thomas J. Maccarone and J. Mitchell Miller and Vikram Rana and Daniel Stern and Shriharsh P. Tendulkar and John A. Tomsick and Natalie Webb and W. W. Zhang},
  journal={Nature},
  year={2014},
  volume={514},
  pages={202-204}
}
The majority of ultraluminous X-ray sources are point sources that are spatially offset from the nuclei of nearby galaxies and whose X-ray luminosities exceed the theoretical maximum for spherical infall (the Eddington limit) onto stellar-mass black holes. Their X-ray luminosities in the 0.5–10 kiloelectronvolt energy band range from 1039 to 1041 ergs per second. Because higher masses imply less extreme ratios of the luminosity to the isotropic Eddington limit, theoretical models have focused… Expand
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