| Proposal ID | 030366 |
| Title | The X-ray Sun in Time: XMM Observations of the Solar Twin 18 Scorpii |
| Download Data Associated to the proposal | 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, itsmagnetically-related chromospheric activity is very similar to the Sun. 18 Scoprovides an important check on the behavior of our present Sun. |
| Publications |
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| 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 |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "closely matched", "xray measures", "porto de mello", "main sequence lifetime", "solar mass star", "nearby g2", "xray sun", "solar twin", "inferred age", "da silva 1997" |
| 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 |