| Name | 055546 |
| Title | The unique system HD49798-RXJ0648 a post spiral-in and common-envelope binary |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0555460201 |
| DOI | https://doi.org/10.5270/esa-dk1wafg |
| Author | Dr Andrea Tiengo |
| Description | HD49798-RXJ0648 is a unique spectroscopic binary containing a 13 s X-ray pulsating star accreting from an early type sub-dwarf. Although predicted by evolutionary models of common envelope spiral-in, no other system of this kind is currently known. The next important step, objective of this proposal, is to determine if the compact star is a neutron star or, as it seems more likely, a white dwarf. In the latter case the 13 s spin period would be the shortest known for a white dwarf, implying a large accreted mass and making this system the white dwarf analogous of LMXRBs containing millisecond pulsars. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-05-10T21:07:29Z/2008-05-11T09:19:27Z |
| 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 | 2009-06-19T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Andrea Tiengo, 2009, 055546, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-dk1wafg |