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The superslow pulsation X-ray pulsars in high mass X-ray binaries
| Content Provider | Scilit |
|---|---|
| Author | Wang, Wei |
| Copyright Year | 2012 |
| Description | There exists a special class of X-ray pulsars that exhibit very slow pulsation of $P_{spin}$ > 1000 s in the high mass X-ray binaries (HMXBs). We have studied the temporal and spectral properties of these superslow pulsation neutron star binaries in hard X-ray bands with INTEGRAL observations. Long-term monitoring observations find spin period evolution of two sources: spin-down trend for 4U 2206+54 $(P_{spin}$ ~ 5560 s with $Ṗ_{spin}$ ~ 4.9 × $10^{−7}$ s $s^{−1}$) and long-term spin-up trend for 2S 0114+65 $(P_{spin}$ ~ 9600 s with $Ṗ_{spin}$ ~ −1 × $10^{−6}$ s $s^{−1}$) in the last 20 years. A Be X-ray transient, SXP 1062 $(P_{spin}$ ~ 1062 s), also showed a fast spin-down rate of $Ṗ_{spin}$ ~ 3 × $10^{−6}$ s $s^{−1}$ during an outburst. These superslow pulsation neutron stars cannot be produced in the standard X-ray binary evolution model unless the neutron star has a much stronger surface magnetic field (B > $10^{14}$ G). The physical origin of the superslow spin period is still unclear. The possible origin and evolution channels of the superslow pulsation X-ray pulsars are discussed. Superslow pulsation X-ray pulsars could be younger X-ray binary systems, still in the fast evolution phase preceding the final equilibrium state. Alternatively, they could be a new class of neutron star system – accreting magnetars. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/75789B43553E2B4A27E57C1DA00619ED/S1743921312023642a.pdf/div-class-title-the-superslow-pulsation-x-ray-pulsars-in-high-mass-x-ray-binaries-div.pdf |
| Ending Page | 206 |
| Page Count | 4 |
| Starting Page | 203 |
| ISSN | 17439213 |
| e-ISSN | 17439221 |
| DOI | 10.1017/s1743921312023642 |
| Journal | Proceedings of the International Astronomical Union |
| Issue Number | S291 |
| Volume Number | 8 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2012-08-01 |
| Access Restriction | Open |
| Subject Keyword | Proceedings of the International Astronomical Union Astronomy and Astrophysics Superslow Pulsation X |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
