| Proposal ID | 011307 |
| Title | A spatially resolved spectral study of the North Polar Spur |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0113070101 |
| DOI | https://doi.org/10.5270/esa-jeu1s6e |
| Principal Investigator, PI | Dr Bernd Aschenbach |
| Abstract | GT- The bright X-ray feature North Polar Spur (NPS) is the result of a supernovaremnant shock interacting with the inner walls of the giant supershell aroundthe Sco-Cen OB association. It has been shown that the shock from a 10^{51} ergexplosion within the Loop I superbubble can heat the dense shell to temperaturesof 3-4 10^6 K, giving rise to the observed X-ray emission. The shock runninginto the density gradient in the wall is rapidly decelerated, and strong cooling can lead to non-equilibrium effects like overionization. Using EPIC pn, we canstudy emission line ratios in the 0.3 - 2.0 keV range and thus determine theplasma state. Three adjacent 20 ksec observations will cover the steepestgradient in X-ray brightness. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-09-14T07:52:58Z/2002-03-11T03:04:52Z |
| Version | 21.51_20241115_1113 |
| 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 | 2005-01-01T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "sco cen ob", "erg explosion", "density gradient", "dense shell", "giant supershell", "equilibrium effects", "kev range", "EPIC", "resolved spectral", "steepest gradient", "emission line ratios", "xray emission", "overionization '.", "inner walls", "bright xray", "north polar spur", "epic pn", "xray brightness" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Bernd Aschenbach, 2005, 'A spatially resolved spectral study of the North Polar Spur', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-jeu1s6e |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |