| Proposal ID | 065391 |
| Title | Does the Fe K line evolve around the color-color diagram of neutron star GX17+2 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0653910301 |
| DOI | https://doi.org/10.5270/esa-ysr5pym |
| Principal Investigator, PI | Dr Edward Cackett |
| Abstract | The X-ray spectra of neutron star LMXBs vary frequently, tracing outcharacteristic Z or atoll tracks on color-color diagrams. However, the drivingforce behind this variability remains unclear. The recent discovery of broad,relativistic Fe K emission lines in these systems may finally provide the key tounlocking this secret. The asymmetric line profile observed is characteristic ofemission from the inner disk around a compact object, where extreme Dopplershifts and gravitational redshifts are at play. Thus, the Fe K line acts as auseful tool to track the extent of the inner disk. With four, 30 ks XMM-Newtonobservations of neutron star LMXB GX 17+2, we will follow the evolution of theinner disk around the color-color diagram, testing how, and if, the inner accretion flow changes. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2010-10-07T03:56:16Z/2011-03-16T10:41:38Z |
| Version | 17.56_20190403_1200 |
| 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 | 2012-04-08T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "atoll trac", "xmm newton", "inner accretion flow", "asymmetric line profile", "relativistic fe", "doppler shifts", "line evolve", "line acts", "inner disk", "gravitational redshifts", "xray spectra", "emission lines", "color color diagrams", "driving force", "XMM-Newton", "characteristic z", "color color diagram", "useful tool", "compact object", "neutron star gx17", "XMM" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Edward Cackett, 2012, 'Does the Fe K line evolve around the color-color diagram of neutron star GX17+2', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ysr5pym |