|Title||X Per: The Template Sightline for the Diffuse Interstellar Medium|
|Author||Dr Lynne Valencic|
|Description||Galactic interstellar dust is ubiquitous, but many aspects of the grains are not well known. Current model constraints, based on IR-UV data and assumed elemental abundances, are insufficient, as a plethora of viable models exist. Even the abundances are not well known; modelers must use proxies in the absence of direct measurements for the diffuse interstellar medium (ISM). Recent revisions of these proxy values have only added to confusion over which is the best representative for the diffuse ISM, and highlighted the need for direct measurements from the ISM itself. We will measure the O, Mg, Fe, and Si abundances along one sightline, to X Per, with the XMM-Newton RGS, and use them with our multiwavelength data for this sightline to construct a tightly-constrained, realistic grain model.|
|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, 2011-03-20T00:00:00Z, 060098, 17.56_20190403_1200. https://doi.org/10.5270/esa-sh66mzg|