A dataset provided by the European Space Agency

Name 082440
Title Exploring the X-ray properties of the most luminous quasars at z>6.5


DOI 10.5270/esa-x3wulxq
Author Dr Estelle Pons
Description Using data from DES and VISTA, we have recently discovered three of the most luminous quasars known with redshift z>6.5 including the second most distant quasar and second most luminous quasar at z>6.5. The wide range in rest frame UV SED and ionized near-zone sizes of z>6 quasars suggest a significant diversity in the environments and ages of the quasars at fixed luminosity and redshift. Recent studies have shown that the X-ray properties of high-redshift (z>5.5-6.5) quasars do not differ from those at lower redshifts, suggesting constant spectral properties over cosmic time. However only one quasar above z>6.5 have X-ray observations. We propose to observe with XMM-Newton three luminous z>6.5 quasars in order to test the non-evolutionary scenario at higher redshift.
Publication X-ray properties of z u2273 6.5 quasars . Pons, E., McMahon, R. G., et all. . MNRAS . 491-3884 . 2020 . 2020MNRAS.491.3884P ,
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2018-05-14T21:12:49Z/2018-05-25T11:35:29Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2019-06-08T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2019-06-08T22:00:00Z, 082440, 17.56_20190403_1200. https://doi.org/10.5270/esa-x3wulxq