A dataset provided by the European Space Agency

Proposal ID 020000
Title CORONAL EMISSION FROM DG HALO STARS
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0200000101

DOI https://doi.org/10.5270/esa-autku49
Principal Investigator, PI Dr GIUSEPPINA MICELA
Abstract We propose to observe 3 dG halo stars with chromospheric emission, with the aimto determine if these metal poor stars can have coronae with properties similarto those of population I stars. By assuming the relationship found forpopulation I stars between MgII and coronal emission we have predicted the levelof X-ray luminosity of our targets. Their detection at the predicted level, aswell their non detection, will allow us to determine if old metal poor stars canhost a solar-like dynamo or if MgII emission is due to a basal flux, originatedby acustic waves without any r^ant magnetic component.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-06-28T16:02:36Z/2004-06-29T00:54:31Z
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2005-08-10T00:00:00Z
Keywords "predicted level", "xray luminosity", "acustic waves", "dg halo stars", "coronal emission", "relevant magnetic component", "mgii emission", "basal flux", "chromospheric emission"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr GIUSEPPINA MICELA, 2005, 'CORONAL EMISSION FROM DG HALO STARS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-autku49