| Name | 079572 |
| Title | AR SCO: THE FIRST WHITE DWARF PULSAR |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0795720101 |
| DOI | https://doi.org/10.5270/esa-wy3dcr2 |
| Author | Dr George Pavlov |
| Description | A recent detection of pulsations with the 1.97 min period, modulated by the binary period of 3.56 hr, in the radio-IR-optical-UV synchrotron emission from the white dwarf (WD) - M-star binary AR Sco was the first discovery of a WD pulsar powered by WD spindown. Although it is clear that the detected emission is produced by relativistic particles, the acceleration mechanism and the sites of emission remain uncertain. To distinguish between different models for the WD-pulsar - M-star binary, X-ray observations are particularly useful, especially at energies above 10 keV. We propose a NuSTAR observation supplemented by a short XMM-Newton observation to investigate the X-ray spectrum and pulsations of AR Sco and infer a realistic model of this unique object. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2018-02-19T05:40:07Z/2018-02-19T14:00:07Z |
| Version | 17.56_20190403_1200 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2019-03-06T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2019-03-06T23:00:00Z, 079572, 17.56_20190403_1200. https://doi.org/10.5270/esa-wy3dcr2 |