This is a request for a second off-center observation of the galaxy group NGC5044. Our previous offset observation, centered 217 kpc to the south of thegroup center, revealed that the hot gas in this region has received much lessiron than expected from dwarf galaxy outflows. We now request to observe NGC5044 offset to the west where the density of dwarf galaxies is greater. If theiron abundance is greater in the western offset, this will alleviate or removethe iron shortfall implied by the southern offset and will indicate that baryonsentered the group anisotropically along cosmic filaments. If not, this willstrengthen our conclusion that a considerable fraction of the iron produced bysupernovae is not visible either in the hot gas or in galactic stars.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-01-06T09:47:35Z/2006-01-07T01:51:07Z
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, Prof William Mathews, 2007, 'WHERE IS THE IRON IN THE NGC 5044 GALAXY GROUP questionMark', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ni8qtdl
