|Title||Stellar Mass Loss Versus External Accretion in X-ray Bright Ellipticals|
|Author||Dr Craig Sarazin|
|Description||Observations of NGC 5846 and NGC 4649, two X-ray-bright elliptical galaxies with extended emission line filaments and dust, will be used to study the interaction between the hot, X-ray emitting gas and cooler interstellar material. We will determine whether heat conduction into the cooler gas or energy losses to grains affect the thermal state of the gas. The elemental abundances and gradients in the hot gas will be derived and compared to the stellar values. If the gas results from local stellar mass loss, the abundances should be similar. If there is a cooling flow, the abundances at each radius should reflect those of stars at larger radii. The RGS will be used to disperse the central regions of the galaxies and to detect or limit low ionization X-ray lines from cooling gas.|
|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, 2005-01-01T00:00:00Z, 002154, PPS_NOT_AVAILABLE. https://doi.org/10.5270/esa-r1cmpjb|