Name | 074028 |
Title | Toward a long-term phase-connected ephemeris for the unique X-ray binary HD49798 |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740280101 |
DOI | https://doi.org/10.5270/esa-n4ixfjc |
Author | Dr Sandro MEREGHETTI |
Description | HD 49798 is a unique X-ray binary composed of a 13.2 s pulsator, most likely the fastest-rotating massive white dwarf (1.28+/-0.05 solar masses), orbiting the brightest subdwarf of O spectral type. We obtained a phase-connected timing solution, that should now be extended over a longer time period to unveil the small variations in the spin period expected in this system. Their study will allow us to unambiguously confirm the nature of the compact object, to shed light on the accretion flow geometry and on the magnetic field intensity. This is an updated version of a similar proposal accepted in C priority in AO12. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2014-10-18T07:55:25Z/2014-10-18T17:05:25Z |
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 | 2015-11-13T23:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Sandro MEREGHETTI, 2015, 074028, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-n4ixfjc |