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| Paper: |
Variability and Spectra of Two Neutron Stars in 47 Tucanae |
| Volume: |
271, Neutron Stars in Supernova Remnants |
| Page: |
349 |
| Authors: |
Heinke, C. O.; Grindlay, J. E.; Lloyd, D. A.; Edmonds, P. D. |
| Abstract: |
We report spectral and variability analysis of two quiescent low mass X-ray binaries (previously identified with ROSAT HRI as X5 and X7) in the globular cluster 47 Tuc, from a Chandra ACIS-I observation. X5 demonstrates sharp eclipses with an 8.666+-0.008 hr period, as well as dips showing an increased NH column. Their thermal spectra are well-modeled by unmagnetized hydrogen atmospheres of hot neutron stars, most likely heated by transient accretion, with little to no hard power law component. |
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