|Title||Excavating a dinosaur in the Ophiuchus Cluster|
|Author||Dr Maxim Markevitch|
|Description||The Ophiuchus cluster exhibits a curious concave gas discontinuity near its core. It was discovered by Werner et al, who considered a possibility of it being a boundary of an AGN-inflated bubble, but discounted it because it required too powerful an outburst. Using very low-frequency (70-240 MHz) data from MWA-GLEAM and GMRT, we found that it is in fact a giant bubble filled with diffuse radio emission with an extremely steep spectrum. It appears to be a fossil of the most powerful AGN outbursts seen in any cluster - with the central AGN being a negligible radio source at present. We propose to survey this sector of the cluster to map the X-ray cavity, look for signs of cluster-scale sloshing possibly triggered by this powerful event (hinted at by ROSAT), and clarify the merger details.|
|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, 2022-04-16T00:00:00Z, 086222, 19.16_20210326_1200. https://doi.org/10.57780/esa-7y7k3br|