SU Lyn is a purely accretion-powered symbiotic star revealed for us from X-rays.Its weak high-exciting emission lines rendered it invisible to optical surveys.While indicating that the already significant total estimated Galacticpopulation of symbiotics (virgul3x10^5) is biased and thus underestimated, thisdiscovery opens a new window on accretion and evolution of symbiotics. Here wepropose XMM-Newton observations of two targets to go deeper in the subject\: (i)SU Lyn, to better understand the response of the accretion disk and boundarylayer to changes in accretion rate, and (ii) IGR J17164-3803, in an exploratoryeffort to validate it as a member of the class.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2020-03-30T21:33:28Z/2020-03-31T14:01:48Z
Version
18.02_20200221_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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.
European Space Agency, Dr Raimundo Lopes de Oliveira, 2021, 'A new class of disk-accreting white dwarfs\: diagnosing boundary layers', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-wj33kgu
