The primary X-ray emission observed in AGN is believed to be produced from atiny region surrounding the SMBH, namely the corona. A critical coronalcompactness versus temperature threshold is predicted above which any increasein the source luminosity would then generate positron-electron pairs rather thancontinue heating the coronal plasma. Current observations show that all localAGNs populate the region below this critical line. However, these models haverarely been probed in the high-luminosity regime where the tightest constraintscan be made on the coronal models. Here, we propose four high-luminosityquasars (zvirgul1-2) to more than double the current sample size of high-luminosityquasars to further constrain the coronal models and thus better understand the physics of coronae.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-10-31T07:40:06Z/2023-05-31T16:14:27Z
Version
20.10_20230417_1156
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 Xiurui Zhao, 2024, 'CONSTRAINING THE PROPERTIES OF AGN CORONAE USING A SAMPLE OF LUMINOUS comma HIGH-RE', 20.10_20230417_1156, European Space Agency, https://doi.org/10.57780/esa-gdot9iv
