A dataset provided by the European Space Agency

Name 055546
Title The unique system HD49798-RXJ0648 a post spiral-in and common-envelope binary


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, 2009-06-19T00:00:00Z, 055546, 17.56_20190403_1200. https://doi.org/10.5270/esa-dk1wafg