A dataset provided by the European Space Agency

Name 050587
Title The 6.7 keV-line emission in the Galactic Centre


DOI 10.5270/esa-20kxbih
Author Dr Masaaki Sakano
Description The Galactic Centre Region emits a strong 6.7-keV line attributable to Ka emission of He-like iron, of which the origin has remained a puzzle since its discovery. Arguably, recent Chandra results imply that the line is produced in a hot extended plasma. However, we have shown that the line has a relatively smooth, circularly symmetric distribution centred on Sgr A* and a surface brightness which falls off with radius as 1-r over the range r=3.-12.. This mirrors the distribution of the stellar population and adds strong support to the hypothesis that the 6.7-keV line originates in the summed emission of faint point sources. Here we propose to measure the surface brightness distribution of the 6.7-keV line out to a radius of ~35. as a test of the competing scenarios for its origin.
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-03-09T23:44:18Z/2008-03-10T08:36:15Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2009-04-11T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2009-04-11T00:00:00Z, 050587, 17.56_20190403_1200. https://doi.org/10.5270/esa-20kxbih