We propose observations of the mixed-morphology supernova remnants (MM SNRs)G346.6-0.2 and G359.1-0.5, where presence of overionized plasmas was recentlyrevealed by Suzaku observations. Although there are a number of similaritiesbetween the two objects, the measured abundances are largely different. Theprimary objectives of our proposed observations are to investigate the spatialdistribution of the plasma parameters and abundances, and to resolve the entireplasma into ISM and ejecta components in each SNR. Accurate measurements oftheir ionization states provide a strong constraint on the origin of bothoverionization and peculiar morphology.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2016-04-02T09:23:04Z/2016-04-03T17:34:44Z
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.
European Space Agency, Dr Hiroya Yamaguchi, 2017, 'Spatial Structure of Overionized Plasmas in G346.6-0.2 and G359.1-0.5', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ldms9oj
