|Title||Are all true type 2 Seyfert galaxies low accretors?|
|Author||Dr Stefano Bianchi|
|Description||The primary goal of this proposal is to investigate the physical properties of true Seyfert 2s, objects which are unabsorbed in X-rays and without broad optical lines. The key to find genuine unabsorbed Seyfert 2s, excluding variability issues, is to perform simultaneous X-ray and optical spectroscopy. A campaign of simultaneous X-ray and optical observations of unabsorbed Seyfert 2s has already proved successful in previous XMM AOs, leading to the discovery of the first three unambiguous objects of this new class, all with low accretion rates, in agreement with theoretical models. With the current proposal, we want to explore a different accretion rate regime, by observing three true type 2 candidates with higher accretion rates.|
|Publication||Connecting optical and X-ray tracers of galaxy cluster relaxation . Roberts, Ian D., Parker, Laura C., . MNRAS . 475-4704 . 2018 . 2018MNRAS.475.4704R ,
Revived fossil plasma sources in galaxy clusters . Mandal, S., Intema, H. T., et all. . A&A . 634-4 . 2020 . 2020A&A...634A...4M ,
|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, 2016-09-18T22:00:00Z, 076023, 17.56_20190403_1200. https://doi.org/10.5270/esa-9nm3uge|