A dataset provided by the European Space Agency

Proposal ID 030366
Title The X-ray Sun in Time: XMM Observations of the Solar Twin 18 Scorpii
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0303660101

DOI https://doi.org/10.5270/esa-sf204h9
Principal Investigator, PI Prof Edward Guinan
Abstract We propose to complete an in-depth study of the evolution of the corona of asolar-mass star over its main-sequence lifetime by observing with XMM a star (18Sco) with nearly identical physical properties to the Sun. One of the few starsremaining in the Sun in Time program that does not have X-ray measures is 18Sco, which has been identified as the Closest Ever Solar Twin (Porto de Mello& da Silva 1997). This nearby G2 V star has M_V, T_eff, Fe/H, R/R_0, inferredage and mass that are closely matched to the Sun. Also, it.smagnetically-related chromospheric activity is very similar to the Sun. 18 Scoprovides an important check on the behavior of our present Sun.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-08-26T04:47:19Z/2005-08-26T13:37:38Z
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 2006-10-09T00:00:00Z
Keywords "nearby g2", "main sequence lifetime", "XMM", "xray measures", "xray sun", "da silva 1997", "inferred age", "solar mass star", "closely matched", "porto de mello", "solar twin"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof Edward Guinan, 2006, 'The X-ray Sun in Time: XMM Observations of the Solar Twin 18 Scorpii', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-sf204h9