| Proposal ID | 092110 |
| Title | Stellar spin-down: does the magnetic dynamo have an expiration date? |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0921100101 |
| DOI | https://doi.org/10.57780/esa-zud5sb3 |
| Principal Investigator, PI | Prof Katja Poppenhaeger |
| Abstract | Recent years have seen great controversy about the rotational state ofsolar-mass stars older than the Sun. After excluding observational biases,evidence solidifies that the stars expected to rotate slower than the Sun arenowhere to be found, leading to theories that such stars may have a mostlyswitched-off dynamo and continue to coast with practically constant rotationperiods into their future. However, age-rotation studies can only detect adearth of stars rotating slower than our Sun, not the reason behind it. Incontrast, X-ray observations can probe the state of the magnetic dynamo andreveal whether a switch-off really occurs. We therefore propose deep X-rayobservations of a small, decisive sample of old sunlike stars to find out the reason behind the missing slow rotators. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2023-06-24T15:31:39Z/2023-10-24T21:26:50Z |
| Version | 20.10_20230417_1156 |
| 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 | 2024-11-14T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | XMM-Newton, OM, RGS, EPIC, X-ray, Multi-Mirror, SAS |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Katja Poppenhaeger, 2024, 'Stellar spin-down: does the magnetic dynamo have an expiration date?', 20.10_20230417_1156, European Space Agency, https://doi.org/10.57780/esa-zud5sb3 |