|Title||Searching for Millisecond Pulsars in Extremely Low-Mass White Dwarf Binaries|
|Author||Dr Craig Heinke|
|Description||Several extremely low-mass white dwarfs, with masses below 0.24 solar masses, have recently been discovered in large surveys. These white dwarfs cannot be formed through the evolution of single stars, and several are known as companions of millisecond radio pulsars. We propose a search for X-ray emission from seven relatively bright extremely low-mass white dwarfs to distinguish between neutron star vs. white dwarf companions. New millisecond pulsars with companions amenable to spectroscopy are of great interest, while ruling out neutron star companions will put constraints on common envelope models for double white dwarf evolution.|
|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, 2009-12-20T00:00:00Z, 055344, 17.56_20190403_1200. https://doi.org/10.5270/esa-sj24qhs|