| Proposal ID | 086111 |
| Title | The rotation-activity connection for low mass stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0861110601 |
| DOI | https://doi.org/10.57780/esa-ion2nt7 |
| Principal Investigator, PI | Prof Juergen Schmitt |
| Abstract | Recently a large number of rotation period measurements of low mass stars oftype M have become available. Surprisingly, one finds that in addition to thewell-known rapid rotators a population of very slowly rotating M dwarfs withrotation periods exceeding 100 days. These slow rotators pose a challenge forthe usual rotation- activity paradigm, since about a third of these stars havebeen detected in the ROSAT all-sky survey, even though the RASS data did notprobe significantly deeper than the saturation limit for stars of masses below0.6 MSun. We thus propose XMM follow-up for a complete sample of nearby,undetected low mass stars with long rotation periods down to a sensitivity limitof L_X/L_bol ~ 2 10**-5 to study the relation between X-ray activity and rotation in these stars. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-09-23T22:15:04Z/2020-11-23T21:18:45Z |
| Version | 18.02_20200221_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 | 2021-12-15T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "sky survey", "rotation activity connection", "rass data", "complete sample", "saturation limit", "slow rotators pose", "xray activity", "rapid rotators", "sensitivity limit", "slowly rotating", "ROSAT", "XMM", "low mass stars", "rotation periods", "rotation period measurements" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Juergen Schmitt, 2021, 'The rotation-activity connection for low mass stars', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-ion2nt7 |