|Title||Slow pulsating accreting neutron stars: the enigmatic case of 4U 2206+54|
|Author||Dr PABLO REIG|
|Description||The discovery of pulsations (Pspin=5500s) has solved the controversy on the nature of the compact object in the HMXB 4U2206+54 but has prompted new questions. According to spin evolutionary models such slow pulsations require the system to harbor a magnetar (B~1e14 G). However, the significant detection of a cyclotron resonant scattering feature at 30 keV implies a magnetic field B~3x1e12 G. Another unsolved question is whether the presence of a soft thermal component, representing emission from the polar caps, is present in all accreting pulsars. This proposal seeks to estimate the magnetic field strength through the neutron star spin evolution and investigate with unprecedented detail the soft energy spectrum of 4U2206+54 to check whether the polar cap scenario is applicable.|
|Publication||Accreting magnetars: a new type of high-mass X-ray binaries? . Reig, P., Torrejon, J. M., . MNRAS . 425-595 . 2012 . 2012MNRAS.425..595R ,
An XMM-Newton view of FeKalpha in high-mass X-ray binaries . Gimenez-Garcia, A., Torrejon, J. M., et all. . A&A . 576-108 . 2015 . 2015A&A...576A.108G ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
NuSTAR rules out a cyclotron line in the accreting magnetar candidate 4U2206+54 . Torrejon, J. M., Reig, P., et all. . MNRAS . 479-3366 . 2018 . 2018MNRAS.479.3366T ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2012-03-04T00:00:00Z, 065064, 17.56_20190403_1200. https://doi.org/10.5270/esa-n40j0hw|