|Title||CORONAL EMISSION FROM DG HALO STARS|
|Author||Dr GIUSEPPINA MICELA|
|Description||We propose to observe 3 dG halo stars with chromospheric emission, with the aim to determine if these metal poor stars can have coronae with properties similar to those of population I stars. By assuming the relationship found for population I stars between MgII and coronal emission we have predicted the level of X-ray luminosity of our targets. Their detection at the predicted level, as well their non detection, will allow us to determine if old metal poor stars can host a solar-like dynamo or if MgII emission is due to a basal flux, originated by acustic waves without any r^ant magnetic component.|
|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, 2005-08-10T00:00:00Z, 020000, 17.56_20190403_1200. https://doi.org/10.5270/esa-autku49|