Narrow absorption features in the co-added XMM-Newton RGS spectra of isolated neutron stars
2011; Oxford University Press; Volume: 419; Issue: 2 Linguagem: Inglês
10.1111/j.1365-2966.2011.19809.x
ISSN1365-2966
AutoresM. M. Hohle, F. Haberl, Jacco Vink, C. P. de Vries, R. Neuhäuser,
Tópico(s)High-pressure geophysics and materials
ResumoWe co-added the available XMM–Newton Reflection Grating Spectrometer (RGS) spectra for each of the isolated X-ray pulsars RX J0720.4−3125, RX J1308.6+2127 (RBS1223), RX J1605.3+3249 and RX J1856.4−3754 (four members of the 'Magnificent Seven') and the 'Three Musketeers' Geminga, PSR B0656+14 and PSR B1055−52. We confirm the detection of a narrow absorption feature at 0.57 keV in the co-added RGS spectra of RX J0720.4−3125 and RX J1605.3+3249 (including most recent observations). In addition, we found similar absorption features in the spectra of RX J1308.6+2127 (at 0.53 keV) and maybe PSR B1055−52 (at 0.56 keV). The absorption feature in the spectra of RX J1308.6+2127 is broader than the feature e.g. in RX J0720.4−3125. The narrow absorption features are detected with 2–5.6σ significance.
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