|Title||3C 391: A Key to the Mixed Morphology SNR Mystery|
|Author||Dr Robert Petre|
|Description||The Mixed Morphology remnants are a newly identified SNR class, with radio shells and centrally filled thermal X-ray emission. Most of their attributes, except for their X-ray emission can be explained by the explosion of a massive, windless star inside a molecular cloud. X-ray emission arises either from evaporation of shocked clouds or interior gas reheated by thermal conduction. We propose a 30ks EPIC observation of 3C 391, a prototypical MM SNR, to perform plasma diagnostics and detailed spectral mapping. 3C 391.s ASCA spectrum shows evidence of a recombining, as contrasted to an ionizing, plasma, indicating the presence of dynamically old gas. EPIC spectroscopic confirmation will resolve the issue of the X-ray emission from MM SNR.s.|
|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, 2004-05-17T00:00:00Z, 007374, 17.56_20190403_1200. https://doi.org/10.5270/esa-if14dsd|