| Proposal ID | 083053 |
| Title | A DEFINITIVE INVESTIGATION OF THE MAGNETIZED ACCRETION FLOW IN THE X-RAY PULSAR |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0830530101 |
| DOI | https://doi.org/10.5270/esa-issajib |
| Principal Investigator, PI | Ms McKinley Christine Brumback |
| Abstract | We propose a series of four 20 ks observations with NuSTAR and XMM of theGalactic binary X-ray pulsar Hercules X-1, which has a 35 day superorbitalperiod caused by a warped, precessing accretion disk. The hard beam from theneutron star heats this disk and the corresponding reprocessed, thermal emissionprovides a unique opportunity for observation of magnetic-dominated accretion.Our proposed analysis requires good spectral and timing resolution across thefull energy band (<1 keV to >20 keV) in order to constrain both the softemission from the disk and the pulsar beam. For the first time, we will track acomplete precession of Her X-1a??s accretion disk with full hard X-ray coverageto gain the clearest picture to date of the structure and kinematics of the magnetized accretion flow. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-02-09T12:26:43Z/2019-03-14T16:20:13Z |
| Version | 19.17_20220121_1250 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2020-04-12T22:00:00Z |
| Keywords | "x 1a", "pulsar beam", "hard beam", "neutron star heats", "NuSTAR", "xray pulsar", "clearest picture", "soft emission", "complete precession", "thermal emission", "energy band", "superorbital period", "XMM", "accretion disk", "magnetized accretion flow", "precessing accretion disk", "hard xray coverage", "definitive investigation", "magnetic dominated accretion" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Ms McKinley Christine Brumback, 2020, 'A DEFINITIVE INVESTIGATION OF THE MAGNETIZED ACCRETION FLOW IN THE X-RAY PULSAR', 19.17_20220121_1250, European Space Agency, https://doi.org/10.5270/esa-issajib |