A dataset provided by the European Space Agency

Proposal ID 014868
Title A Study of the Middle-Aged Sun: beta Comae
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148680101

DOI https://doi.org/10.5270/esa-ys946ic
Principal Investigator, PI Dr Manuel Guedel
Abstract We propose to obtain high-quality spectra of the middle-aged (1.6 Gyr) solaranalog beta Comae. This observation will conclude a comprehensive X-rayspectroscopic study of the X-Ray Sun in Time with XMM-Newton, obtaining datafrom a star at the critical transition between magnetically active, rapidlyrotating young stars and stars like the Sun. One of the main goals of this studyis a deeper understanding of the coronal composition of solar analogs atdifferent ages. For younger solar analogs, we find a systematic trend fromunderabundant elements with low first ionization potentials in very active starsto overabundances of the same elements in less active stars. Our target willallow us to extend this study to the complete main-sequence evolution of a solar-type star.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2003-07-20T02:08:16Z/2003-07-20T20:27:13Z
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 2004-09-03T00:00:00Z
Keywords "x ray sun", "systematic trend", "XMM", "solar analogs", "magnetically active", "middle aged", "beta comae", "middle aged sun", "XMM-Newton", "ionization potentials", "coronal composition", "underabundant elements", "active stars", "solar type star", "comprehensive xray spectroscopic", "quality spectra", "xmm newton"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Manuel Guedel, 2004, 'A Study of the Middle-Aged Sun: beta Comae', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ys946ic