|Title||X-ray Study of Born-Again Planetary Nebulae|
|Author||Dr Martin Guerrero|
|Description||Mass-loading occurs when a fast, tenuous flow ablates a slow, dense clump, resulting in the mixing of cool material into the hot shocked gas. Mass-loading exists in many astrophysical settings and affects the X- ray luminosity and temperature of the hot gas. Chandra and XMM-Newton observations of the born-again planetary nebula (PN) Abell 30 have revealed a puzzling soft point source at the central star and soft diffuse X-rays associated with interactions between the fast stellar wind and H-poor ejecta, where mass- loading and charge-exchange reactions occur. We request XMM-Newton observations of Abell 78, the only additional well-resolved born-again PN, to confirm the effects of mass-loading and charge-exchange processes in born-again PNe.|
|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, 2014-06-18T00:00:00Z, 072115, 17.56_20190403_1200. https://doi.org/10.5270/esa-0bgfafi|