PKS 2351-154 is the only known high redshifted quasar (z=2.665) which showsdramatic changes in X-ray flux as well as in its absorbing column density in theUV and X-ray regime. The most likely explanation is provided by a warm absorberlocated in the local environment of the active nucleus. As warm absorbersstrongly reflect the metallicity, the observations proposed here open a uniquechance to determine the metallicity of the material accreting into the centralmassive black hole of a quasar from the quasar age. Comparing the proposedobservation with different measurements of other (warm absorbed) quasars of themetal enrichment as function of the redshift can be studied and the physicalconditions of the local environment of the black hole can be compared.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2004-12-04T20:51:23Z/2004-12-05T20:59:54Z
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, Dr NORBERT SCHARTEL, 2005, 'PKS 2351-154 comma A HIGH REDSHIFT QUASAR: WARM ABSORBER AND METALLICITY', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3pix14d
