A dataset provided by the European Space Agency

Name 055176
Title The X-ray nuclei of FRII radio galaxies: unification and accretion modes


DOI https://doi.org/10.5270/esa-zefr4sn
Author Dr Martin Hardcastle
Description We have recently shown that a population of powerful radio galaxies, the low-excitation FRII radio galaxies, appears to have no accretion-related nuclear X-ray emission, despite having high-luminosity radio jets: plausibly these objects are accreting via a different, radiatively inefficient accretion mode compared to the better understood narrow-line radio galaxies and quasars. This picture is consistent with other information from the optical and infrared bands, but the crucial X-ray constraints come from a small and inhomogenous sample. We propose observations of a sample of low-excitation and narrow-line radio galaxies which will greatly increase our sample size and allow us to make definitive statements about the nature of the accretion mode in these objects.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-05-29T13:17:36Z/2009-04-08T00:44:36Z
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 2010-04-30T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2010, 055176, 17.56_20190403_1200. https://doi.org/10.5270/esa-zefr4sn