A dataset provided by the European Space Agency

Name 050235
Title Determining the physical parameters of AM CVn binaries


DOI https://doi.org/10.5270/esa-xri0yj0
Author Dr Gavin Ramsay
Description AM CVn binaries are a group of stars in which a white dwarf accretes from a hydrogen deficient companion in a very short period binary (P_orb=5-65 mins). We can study accretion flows of almost pure helium. They are predicted to be strongest known sources for the gravitational wave observatory LISA. We aim to extend our survey of these objects using XMM which has shown that a large fraction of their accretion luminosity is emitted in the UV and X-ray bands. In particular, we will determine the mass transfer rate, the element abundance from their X-ray spectra and characterise the X-ray and UV variability for 4 systems. Together with our existing dataset of these systems it will give us important clues for our understanding of their evolutionary history and their energy balance.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-01-25T22:03:45Z/2008-01-26T03:50:43Z
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 2009-02-13T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2009-02-13T00:00:00Z, 050235, 17.56_20190403_1200. https://doi.org/10.5270/esa-xri0yj0