A dataset provided by the European Space Agency

Name: The nature of magnetic activity at the low-mass end of the main-sequence
Published: 2011-02-12T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	060041
Title	The nature of magnetic activity at the low-mass end of the main-sequence
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0600410101
DOI	https://doi.org/10.5270/esa-98mk8hz
Principal Investigator, PI	Dr Beate Stelzer
Abstract	We propose a systematic investigation of magnetic activity on ultracool dwarfsat the spectral type M/L transition. XMM-Newton allows to trace the effects ofboth non-thermal and thermal processes in cool star atmospheres simultaneously,using EPIC to detect coronal X-rays and the Optical Monitor to record opticalemission in response to non-thermal electrons. We selected a sample of nearbyultracool dwarfs known to maintain magnetic fields and mostly yielding evidencefor chromospheres. We aim at constraining the nature and efficiency of stellardynamos and coronal heating at the bottom of the main-sequence by searching forthe quiescent corona, establishing flare energy distributions, and studying theconnection between chromospheric and coronal activity indicators.
Publications	The ultracool dwarf DENIS-P J104814.7-395606. Chromospheres and coronae at the low-mass end of the main-sequence \|Stelzer B. Alcala J. et al. \| A&A \| 537-94 \| 2012 \| 2012A&A...537A..94S \| http://ui.adsabs.harvard.edu/#abs/2012A&A...537A..94S Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift \|Yershov V. N. \| Ap&SS \| 354-97 \| 2014 \| 2014Ap&SS.354...97Y \| http://ui.adsabs.harvard.edu/#abs/2014Ap&SS.354...97Y The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2010-01-17T12:12:41Z/2010-01-17T18:16:18Z
Version	21.51_20241115_1113
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	2011-02-12T00:00:00Z
Last Update	2026-07-09
Keywords	"XMM-Newton", "main sequence", "thermal processes", "XMM", "nearby ultracool dwarfs", "spectral type", "nonthermal electrons", "flare energy distributions", "ultracool dwarfs", "quiescent corona", "magnetic activity", "yielding evidence", "EPIC", "low mass", "maintain magnetic fields", "record optical emission", "cool star atmosphere", "coronal activity indicators", "stellar dynamos", "coronal xray", "systematic investigation", "coronal heating", "xmm newton allows"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Beate Stelzer, 2011, 'The nature of magnetic activity at the low-mass end of the main-sequence', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-98mk8hz
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.