|Title||PKS 2351-154, A HIGH REDSHIFT QUASAR: WARM ABSORBER AND METALLICITY|
|Author||Dr NORBERT SCHARTEL|
|Description||PKS 2351-154 is the only known high redshifted quasar (z=2.665) which shows dramatic changes in X-ray flux as well as in its absorbing column density in the UV and X-ray regime. The most likely explanation is provided by a warm absorber located in the local environment of the active nucleus. As warm absorbers strongly reflect the metallicity, the observations proposed here open a unique chance to determine the metallicity of the material accreting into the central massive black hole of a quasar from the "quasar age". Comparing the proposed observation with different measurements of other (warm absorbed) quasars of the metal enrichment as function of the redshift can be studied and the physical conditions of the local environment of the black hole can be compared.|
|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, 2005-12-18T00:00:00Z, 020324, 17.56_20190403_1200. https://doi.org/10.5270/esa-3pix14d|