|Title||Building Dust Grain Models for Different ISM Environments|
|Author||Dr Lynne Valencic|
|Description||Interstellar dust is a vital component of Galactic evolution, crucial to forming objects as small as H2 and as large as stars. Despite this, relatively little is known about the grains nature. Current grain models of the standard diffuse ISM , based on constraints from the NIR-UV regimes and assumed cosmic elemental abundances, cannot be applied to X-ray observations. New grain models that are constrained by data in the full NIR-UV-X-ray bandpasses, over a broad range of dust environments, are needed. X-ray dust halos from absorbed sources observed with XMM-Newton-EPIC are an excellent diagnostic of grain characteristics that can be used in conjunction with NIR-UV data to forge a comprehensive, realistic grain model that spans these regimes in both the dense and diffuse ISM.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, 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, 2010-09-12T00:00:00Z, 060095, 17.56_20190403_1200. https://doi.org/10.5270/esa-u2l965g|