| Proposal ID | 078511 |
| Title | A Snapshot Survey of the Hyades: Testing Models for Magnetic Saturation |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0785110101 |
| DOI | https://doi.org/10.5270/esa-hazk0nt |
| Principal Investigator, PI | Prof Marcel Agueros |
| Abstract | Investigations of the relationship between stellar magnetic activity androtation reveal the presence of a saturation threshold where, for unknownreasons, activity no longer varies with rotation period (Prot). However, thesestudies have focused on stars in young open clusters (<500 Myr) and field stars(2-10 Gyr). Measuring Prot and proxies for magnetic activity in older openclusters is essential to understand the evolution of the activity-rotationrelation from the ZAMS to the age of field stars. We propose a snapshot X-raysurvey of K and M dwarfs with measured Prot in the 650-Myr-old Hyades. Bymatching the resulting X-ray catalog to our catalog of 134 Hyades Prot, we willanalyze the behavior of coronal activity as a function of Rossby number Ro at 650 Myr. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-08-17T00:55:03Z/2017-03-08T01:40:00Z |
| 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 | 2018-03-29T22:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "xray catalog", "magnetic activity", "134 hyades prot", "field stars", "snapshot xray survey", "snapshot survey", "rotation period prot", "coronal activity", "magnetic saturation", "saturation threshold", "activity rotation relation", "stellar magnetic activity" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Marcel Agueros, 2018, 'A Snapshot Survey of the Hyades: Testing Models for Magnetic Saturation', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-hazk0nt |