The shallow potentials of galaxy groups make them vulnerable to heating and gasloss caused by powerful AGN outbursts. Theoretical models suggest that feedbackat zvirgul2 must have ejected gas from groups, reducing their baryon content, but alack of identified nearby non-cool-core (NCC) groups makes it difficult todetermine whether AGN continue to have such a significant impact on thestructure of the intra-group medium (IGM). We propose a deep observation of HCG15, a disturbed non-cool-core group which appears to have undergone anexceptionally powerful AGN outburst virgul190-330 Myr ago. We will search forcavities, make a more accurate estimate of the outburst power, examine the IGMfor evidence of outward gas transport, and determine whether the AGN has disrupted the group core.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2014-08-06T21:09:43Z/2014-08-08T12:03:03Z
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 Ewan O'Sullivan, 2015, 'An exceptionally powerful AGN outburst in the low-luminosity non-cool-core group', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-g7y9yz0
