Proposal ID | 014642 |
Title | Neutron star radii from out-of-core cluster sources |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0146420101 |
DOI | https://doi.org/10.5270/esa-kter82r |
Principal Investigator, PI | Prof Frank Verbunt |
Abstract | The radius of neutron stars can be determined from their X-ray spectrum. Quiescent soft X-ray transients are the best candidates for this, provided theirinterstellar absorption and distance are independently known. We propose toobserve two such systems, well outside the cores of globular clustersNGC6388 and NGC1904, which have high countrates, and are not contaminated bynearby other sources. We aim at better than 10 percent accuracy.These sources are also interesting from a dynamical point of view, since theymust have been catapulted from the cluster cores. As a bonus, we will observethe cores of the two clusters, one of which is the second-highest instellar-encounter frequency. |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2003-03-21T23:28:34Z/2003-03-22T13:03:52Z |
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. |
Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
Date Published | 2004-04-16T00:00:00Z |
Keywords | "neutron stars", "percent accuracy", "xray spectrum", "stellar encounter frequency", "NGC6388", "globular cluster ngc6388", "core cluster sources", "neutron star radii", "interstellar absorption", "cluster cores" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Frank Verbunt, 2004, 'Neutron star radii from out-of-core cluster sources', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-kter82r |