XMM-Newton observation of the very old pulsar J0108-1431
dc.contributor.author | Posselt, B. | |
dc.contributor.author | Arumugasamy, P. | |
dc.contributor.author | Pavlov, G. | |
dc.contributor.author | Manchester, R. | |
dc.contributor.author | Shannon, Ryan | |
dc.contributor.author | Kargaltsev, O. | |
dc.date.accessioned | 2017-01-30T10:58:21Z | |
dc.date.available | 2017-01-30T10:58:21Z | |
dc.date.created | 2016-01-11T20:00:25Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Posselt, B. and Arumugasamy, P. and Pavlov, G. and Manchester, R. and Shannon, R. and Kargaltsev, O. 2012. XMM-Newton observation of the very old pulsar J0108-1431. Astrophysical Journal. 761 (2): Article ID 117. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/7206 | |
dc.identifier.doi | 10.1088/0004-637X/761/2/117 | |
dc.description.abstract |
We report on an X-ray observation of the 166 Myr old radio pulsar J0108–1431 with XMM-Newton. The X-ray spectrum can be described by a power-law model with a relatively steep photon index Γ ≈ 3 or by a combination of thermal and non-thermal components, e.g., a power-law component with fixed photon index Γ = 2 plus a blackbody component with a temperature of kT = 0.11 keV. The two-component model appears more reasonable considering different estimates for the hydrogen column density N H. The non-thermal X-ray efficiency in the single power-law model is η PL1-10keV/E ~ 0.003, higher than in most other X-ray-detected pulsars. In the case of the combined model, the non-thermal and thermal X-ray efficiencies are even higher, η PL1-10keV ~ ηbbPC ~ 0.006. We detected X-ray pulsations at the radio period of P ≈ 0.808 s with significance of ≈7σ. The pulse shape in the folded X-ray light curve (0.15-2 keV) is asymmetric, with statistically significant contributions from up to five leading harmonics. Pulse profiles at two different energy ranges differ slightly: the profile is asymmetric at low energies, 0.15-1 keV, while at higher energies, 1-2 keV, it has a nearly sinusoidal shape. The radio pulse peak leads the 0.15-2 keV X-ray pulse peak by Δ ø = 0.06 ± 0.03. | |
dc.title | XMM-Newton observation of the very old pulsar J0108-1431 | |
dc.type | Journal Article | |
dcterms.source.volume | 761 | |
dcterms.source.number | 2 | |
dcterms.source.issn | 0004-637X | |
dcterms.source.title | Astrophysical Journal | |
curtin.department | Curtin Institute of Radio Astronomy (Physics) | |
curtin.accessStatus | Open access via publisher |
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