|Title||The Secret X-ray Lives of Cepheids: A New Frontier in X-ray Astronomy with XMM|
|Author||Dr Edward Guinan|
|Description||Thanks to XMM Cycle 6+7 approved observations for our program, we are now immersed in a stellar mystery- why and how are Classical Cepheids producing X- rays? The 3 observed for us so far (Polaris, delta Cep & beta Dor) have been detected as X-ray sources - against previously held notions. Our recent XMM results mark the first unambiguous detections of Cepheids in X-rays. We now have 2 aims: obtain deeper spectra of d Cep & b Dor at different critical pulsation phases to understand how they produce X-rays - and to expand the database of Cepheid X-ray detections to different pulsation properties. We submit a Large Proposal of 8 observations (410-ksec). With its enhanced sensitivity (5-6x Chandra) and soft response (virgul0.15 keV), XMM is uniquely suited for the science goals of this proposal.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2011-04-14T00:00:00Z, 060374, 17.56_20190403_1200. https://doi.org/10.5270/esa-1pnbovm|