|Title||Stacking the X-ray Line Forest: Detecting the Missing Baryons|
|Author||Dr Akos Bogdan|
|Description||In the low-redshift universe, a fraction of the baryons remains unaccounted for on the largest scales and on the galaxy scales, which define the global and local missing baryon problems. A promising approach to resolve these problems is to probe X-ray absorption lines imprinted on the spectrum of background quasars. By utilizing our novel stacking method, we detected an OVII absorption line in the spectrum of PKS0405-123. We propose deep XMM-Newton observations that will boost the stacked exposure time to 10.4 Ms, allowing us to probe the absorption lines to unprecedented depths. We will demonstrate the robust nature of the detection, increase its significance to >5sigma, and build an accurate gas density profile, thereby addressing the global and the local missing baryon problems.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN|
|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, 2021-09-08T00:00:00Z, 088265, 19.16_20210326_1200. https://doi.org/esa-[xxxxxxx]|