The nearby dark group centered on NGC 1407 is notable for a nearby bright galaxy(NGC 1400) with a velocity differing by at least 1200 km/s. This large velocitydifference, plus controversy over these two galaxiesa?? respective distances,hasled to a wide range of mass estimates for this group. Our analysis of XMM-Newtondata reveals an extended region of enhanced surface brightness near NGC 1400which may be a cold front. We also find that the hottest regions lie betweenNGC 1400 and 1407, suggesting that their atmospheres are colliding. We propose.text on Chandra cut . a 30 ks XMM pointing covering the east side of NGC1407 to obtain a complete temperature map as well as a total group mass profile.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2012-01-15T03:38:51Z/2012-01-15T13:04:05Z
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, Ms Yuanyuan Su, 2013, 'Joint Chandra/XMM-Newton Observation of NGC1407/1400 complex', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-5qs7y7z
