| Name | 078207 |
| Title | Magnetic Flux and Coronal X-ray Emission in the Late Stages of Stellar Evolution |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0782070101 |
| DOI | https://doi.org/10.5270/esa-4vrmpoe |
| Author | European Space Agency |
| Description | Surface magnetic fields strengths of 2-10 G have been measured from the evolved stars chi Cyg and U Mon. These measurements support the notion that large-scale magnetic fields thread the circumstellar environment of asymptotic giant branch (AGB) and post-AGB stars. Magnetic fields are possible triggers of the superwind phase of AGB stars and asymmetric shaping of mass loss into the post-AGB phase. The low surface magnetic field strengths imply X-ray fluxes that are within reach of deep XMM exposures. We propose XMM X-ray observations of these two evolved stars to detect their predicted low level X-ray emission and establish a coronal origin for any X-ray emission. Ultimately, these observations provide insight into the evolution of stellar magnetic processes. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-05-04T12:04:29Z/2016-10-24T04:20:06Z |
| 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 | 2017-11-11T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2017, Magnetic Flux And Coronal X-Ray Emission In The Late Stages Of Stellar Evolution, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-4vrmpoe |