We propose to complete our investigation of the massive group centered on the cDgalaxy NGC4839, which is falling into the Coma cluster. The completedobservations will allow the physics and dynamics of this merger to be studied inunprecedented detail. Our 112 ks (80 ks plus 40% overhead) XMM-Newtonobservation was badly flared. To complete our program, we request an additional58 ks (which includes 40% overhead). With a complete data set, we will determinethe nature of the shock/sheath region at the interface between the Coma ICM andthe group gas, investigate the newly identified (120x75 kpc) cocoon surroundingNGC4839, and study the 400 kpc ram pressure stripped tail behind NGC4839 todetermine the importance of mixing of cluster gas with stripped group gas.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2012-06-02T03:09:51Z/2012-06-04T12:59:17Z
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 William Forman, 2013, 'Understanding the Physics and Dynamics of the NGC4839 Group as it Falls into the', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-qnm9wlf
