| Proposal ID | 055176 |
| Title | The X-ray nuclei of FRII radio galaxies: unification and accretion modes |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551760101 |
| DOI | https://doi.org/10.5270/esa-zefr4sn |
| Principal Investigator, PI | Dr Martin Hardcastle |
| Abstract | We have recently shown that a population of powerful radio galaxies, thelow-excitation FRII radio galaxies, appears to have no accretion-related nuclearX-ray emission, despite having high-luminosity radio jets: plausibly theseobjects are accreting via a different, radiatively inefficient accretion modecompared to the better understood narrow-line radio galaxies and quasars. Thispicture is consistent with other information from the optical and infraredbands, but the crucial X-ray constraints come from a small and inhomogenoussample. We propose observations of a sample of low-excitation and narrow-lineradio galaxies which will greatly increase our sample size and allow us to makedefinitive statements about the nature of the accretion mode in these objects. |
| Publications |
|
| 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 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2010-04-30T00:00:00Z |
| Keywords | "definitive statements", "sample size", "accreting via", "infrared bands", "luminosity radio jets", "accretion mode", "inhomogenous sample", "xray nuclei", "narrow line radiogalaxy", "xray constraints", "powerful radiogalaxy", "accretion modes", "frii radiogalaxy", "low excitation" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Martin Hardcastle, 2010, 'The X-ray nuclei of FRII radio galaxies: unification and accretion modes', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zefr4sn |