|Title||Low-luminosity accretion in NGC4261 and NGC6251|
|Author||Dr Rita Sambruna|
|Description||Most nearby galaxies host supermassive black holes, accreting at low rates in advection-dominated flows, or ADAFs. Depending on accretion rate and mass loss, hard X-ray continua and emission lines at soft and hard X-rays are expected in these systems. We propose XMM observations of the nearby low-power radio galaxies NGC 4261 and NGC 6251, the only radio-loud AGN, along with M87, hosting a supermassive black hole of known mass and where an ADAF may be occurring. Our proposed XMM observations will allow a detailed study of the hard X-ray continua and Fe lines detected in the ASCA data of NGC 4261 and NGC 6251, constraining the ADAF.s dynamical and physical properties as a function of black hole mass and luminosity.|
|Publication||No observations found associated with the current proposal|
|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, 2003-05-19T00:00:00Z, 005634, 17.56_20190403_1200. https://doi.org/10.5270/esa-xi58joz|