|Title||Mapping the wind and accretion structure in HMXBs using Vela X-1|
|Author||Dr Victoria Grinberg|
|Description||We propose a 100 ks XMM-Newton observation with simultaneous NuSTAR coverage of the wind-accreting HMXB Vela X-1 at orbital phase = 0.35-0.55, when we expect the largest changes in absorption as the accretion wake starts to overlap our line of sight. It will allow us to map the wind and accretion structure in the system, in particularly to trace the wakes, study the clumpiness of the wind and its ionization structure and investigate the location of the reprocessing sites in the system. We will additionally be able to illuminate the properties of the accretion columns through variability studies of the cyclotron resonance scattering features and pulse-phase resolved spectroscopy and to investigate the origin of the soft excess.|
|Publication||No observations found associated with the current proposal|
|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, 2020-05-24T22:00:00Z, 084189, 19.17_20220121_1250. https://doi.org/10.5270/esa-0lb1fyk|