|Title||Hot Gas in Wind Blown Bubbles|
|Author||Prof You-Hua Chu|
|Description||Fast stellar winds from massive stars sweep up the surrounding gas to form bubbles. The shocked stellar wind reaches X-ray-emitting temperatures. Only two wind-blown bubbles have been confirmed to emit diffuse X-rays: NGC 6888 and S 308. Both bubbles are blown by Wolf-Rayet stars, and both contain processed stellar material ejected by their progenitors. The observed X-ray fluxes of both NGC 6888 and S308 are lower than model predictions by orders of magnitude. The high spatial and spectral resolutions of the XMM instruments provide an opportunity to monumentally improve the quality of the X-ray observations so that a comprehensive investigation of a bubble is possible. We request XMM observations of S 308 in this AO and NGC 6888 in the future.|
|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, 2002-12-31T00:00:00Z, 007957, 17.56_20190403_1200. https://doi.org/10.5270/esa-zf7by7s|