|Title||An Extended Hot Halo Gas Around M31|
|Author||Prof Joel Bregman|
|Description||Our nearest spiral galaxy neighbor, M31, has diffuse bulge emission and probably has an extended diffuse halo of hot gas, similar to that seen in other spiral galaxies. Unlike more distant spirals, where halo gas observations are photon-starved, a M31 halo will not suffer this problem, allowing the gas distribution to be measured and the temperature to be mapped with unprecedented accuracy. This will define halo gas properties, the disk-halo interface and it will be a powerful test of models. This X-ray halo can have a radial extent of 1 degree (10-15 kpc), so a mosaic of observations will be constructed along the minor axis, leveraging existing observations. By using overlapping fields, we will flat-field the data to the necessary precision.|
|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, 2007-08-04T00:00:00Z, 040406, 17.56_20190403_1200. https://doi.org/10.5270/esa-q83cghz|