A recent fundamental problem with the standard solar model has arisen that couldbe solved if the solar Ne abundance is about 2.5 times higher than currentlysupposed - just the value found in stellar coronae. However, solar measurementsfor isolated coronal features are generally lower and only one otherinconclusive Ne/O measurent exists for low activity solar analogues. EPIC PNNe/O measurements of a small sample of early G dwarfs will tell us whetherexisting solar measurements are representative or misleading, in what stars Nemight be fractionated, and whether Ne can solve the solar model problem. Theresults will also be important for determining the cosmic abundance of neon andconstraining supernova type II enrichment.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-08-05T07:39:05Z/2006-11-03T09:57:37Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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.
European Space Agency, Dr Jeremy Drake, 2007, 'Neon in Low Activity Suns and the Solar Model Problem', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ajaggw4
