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

  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},
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
A Population of Ultraluminous X-ray Sources with An Accreting Neutron Star
Most ultraluminous X-ray sources (ULXs) are believed to be X-ray binary systems, but previous observational and theoretical studies tend to prefer a black hole rather than a neutron star accretor.Expand
Magnetic field strength of a neutron-star-powered ultraluminous X-ray source
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Resolved atomic lines reveal outflows in two ultraluminous X-ray sources
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Ultrafast outflows in ultraluminous X-ray sources
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Diffuse X-ray emission around an ultraluminous X-ray pulsar
Ultraluminous X-ray sources (ULXs) are extragalactic X-ray emitters located off-centre of their host galaxy and with a luminosity in excess of a few 10 39  erg s −1 , if emitted isotropically 1 , 2 .Expand
A Luminous X-ray Flare From The Nucleus of The Dormant Bulgeless Spiral Galaxy NGC 247
NGC 247 is a nearby late-type bulgeless spiral galaxy that contains an inactive nucleus. We report a serendipitous discovery of an X-ray flare from the galaxy center with a luminosity up to 2*10^39Expand
An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
Observations showing that NGC 5907 ULX is instead an x-ray accreting neutron star (NS) with a spin period evolving from 1.43 seconds in 2003 to 1.13 seconds in 2014 suggest that other extreme ULXs (x-ray luminosity ≥ 1041 erg second−1) might harbor NSs. Expand
Ultraluminous X-Ray Sources
Ultraluminous X-ray sources (ULXs) were identified as a separate class of objects in 2000 based on data from the Chandra X-Ray Observatory. These are unique objects: their X-ray luminosities exceedExpand


Puzzling accretion onto a black hole in the ultraluminous X-ray source M 101 ULX-1
Optical spectroscopic monitoring of M 101 ULX-1 confirms the previous suggestion that the system contains a Wolf-Rayet star, and reveals that the orbital period is 8.2 days, and argues that the black hole has a minimum mass of 5, and more probably a mass of 20−30, but is very unlikely to be an intermediate-mass black hole. Expand
Ultraluminous X-ray sources in the Chandra and XMM-Newton era
Abstract Ultraluminous X-ray sources (ULXs) are accreting black holes that may contain the missing population of intermediate mass black holes or reflect super-Eddington accretion physics. Ten yearsExpand
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X-ray observations of ultraluminous X-ray sources
Abstract Ultraluminous X-ray sources (ULXs) are amongst the most intriguing of X-ray source classes. Their extreme luminosities—greater than 1039 erg s−1 in the 0.3–10 keV band alone—suggest eitherExpand
Accretion Disc Models for Compact X-Ray Sources
The accretion process is considered, in cases when the infalling matter possesses angular momentum and forms a disc spinning around a central compact mass. This situation occurs when gas falls onto aExpand
A 62 Day X-Ray Periodicity and an X-Ray Flare from the Ultraluminous X-Ray Source in M82
In 240 days of X-ray monitoring of M82, we have discovered an X-ray periodicity at 62.0 ? 2.5 days with a peak-to-peak amplitude corresponding to an isotropic luminosity of 2.4 ? 1040 ergs s-1 in M82Expand
The Beaming of Radiation from an Accreting Magnetic Neutron Star and the X-ray Pulsars
As a result of accretion, a neutron star with a strong magnetic field H ~ 10/sub 10/ to 10/sup 12/ Gauss may exhibit characteristics of an x-ray pulsar with a knife radiation pattern. The infallingExpand
Discovery of Millihertz X-Ray Oscillations in a Transient Ultraluminous X-Ray Source in M82
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Discovery of 69 ms periodic X-ray pulsations in A0538 — 66
Both the recurrent X-ray transient A0538–66 and its optical counterpart undergo outbursts at intervals which are multiples of 16.6 days1–3. The times of outbursts are subject to appreciable jitterExpand