SNRs are thought to be an origin of the galactic cosmic rays. An importantproblem is how accelerated protons escape from the SNR shock front. From recentstudies on SNRs, it is implied that there is a relation between escaping ofprotons and interaction with molecular clouds (MCs). We chose a GeV SNR HB 21 asthe best target to study it, which must be a missing link between GeV SNRs andnon-GeV SNRs with the largest size and weakest gemma-ray emission. Such factsenable us spatially resolved spectroscopy for the investigation of the relationbetween gamma-ray emission and interaction with MCs. Here, we propose a 45 ksecXMM observation of a north-west region of HB 21 to compare the plasma propertiesto those of another region obtained with Suzaku.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-10-25T07:32:41Z/2017-10-25T21:32:41Z
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, Mr Hiromasa Suzuki, 2018, 'INVESTIGATION INTO THE PLASMA OF THE DARKEST GeV SNR HB 21', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-2m51zo5
