| Name | 030366 |
| Title | The X-ray Sun in Time: XMM Observations of the Solar Twin 18 Scorpii |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0303660101 |
| DOI | https://doi.org/10.5270/esa-sf204h9 |
| Author | Prof Edward Guinan |
| Description | We propose to complete an in-depth study of the evolution of the corona of a solar-mass star over its main-sequence lifetime by observing with XMM a star (18 Sco) with nearly identical physical properties to the Sun. One of the few stars remaining in the "Sun in Time" program that does not have X-ray measures is 18 Sco, 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, inferred age and mass that are closely matched to the Sun. Also, it.s magnetically-related chromospheric activity is very similar to the Sun. 18 Sco provides an important check on the behavior of our present Sun. |
| Publication | No observations found associated with the current proposal |
| 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 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2006-10-09T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2006-10-09T00:00:00Z, 030366, 17.56_20190403_1200. https://doi.org/10.5270/esa-sf204h9 |