|Title||EF Eridani in the low state|
|Author||Prof Frederick Walter|
|Description||The polar EF Eridani (2A 0311-227) was once one of the brightest soft X-ray sources in the sky. For the past decade it has been in an extended inactive state (with the exception of occasional short "burps"). We seek to study the residual X-ray activity in this system. The data suggest that the residual optical activity occurs either on the irradiated surface of the substellar mass companion or in a coupling region where the secondary.s wind and-or its magnetic field interacts with the megaGauss field of the white dwarf. X-ray observations will provide important clues to the magnetic geometry of polars, and the physics of the coupling region.|
|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, 2012-02-03T00:00:00Z, 065229, 17.56_20190403_1200. https://doi.org/10.5270/esa-3hul3td|