Our program to investigate the nature of the dim X-ray sources in globularclusters (GCs), proposed to be various binaries, has revealed two quiescentX-ray binaries with a neutron star primary (qNSs). Examining 8 other GCs,indicates that a correlation exists between the collision rate and the number ofqNSs. We wish to observe 4 GCs, which should contain varying numbers of qNS, totry to verify the relation, which has implications for the formation andevolution of GCs. Using the well-determined neutron star parameters will alsohelp exclude many possible equations of state. Further, we will continue tocharacterize the content of GCs, as it is of interest for theories of binaryproduction and evolution, and the evolution and survival of GCs.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-02-01T01:28:21Z/2005-03-24T04:16:36Z
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.
European Space Agency, Dr DIDER BARRET, 2008, 'THE STELLAR COLLISION RATE AND NEUTRON STAR BINARIES IN GLOBULAR CLUSTERS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-f75anyg
