We propose to conduct pointed observations with XMM of the extendedX-ray-emitting plasma associated with the Galactic supernova remnant HB21. HB21is a Galactic mixed-morphology SNRs (MMSNRs)\: like other sources in its class,HB21 exhibits a shell-like radio morphology coupled with a center-filled X-raymorphology produced by thermal emission from an interior plasma. HB21 is one ofthe closest MMSNRs that is known to be interacting with adjacent molecularclouds in a dramatic fashion. Our proposed observations of HB21 will sample thebrightest portion of the central emission and will search for spectralvariations (such as in temperature and in elemental abundances) in theX-ray-emitting plasma with the intent of testing different theories for the origin of MMSNRs.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2019-04-16T12:37:31Z/2019-04-23T13:29:59Z
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, Prof Thomas Pannuti, 2020, 'XMM-Newton Observations of the Galactic Supernova Remnant HB21 openParG89.0+4.7closePar', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ldxqryu
