A dataset provided by the European Space Agency

Name: AK Sco: enhanced magnetic activity in a pre-main sequence interacting binary
Published: 2012-04-12T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	065187
Title	AK Sco: enhanced magnetic activity in a pre-main sequence interacting binary
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651870201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651870301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651870401
DOI	https://doi.org/10.5270/esa-40d6y90
Principal Investigator, PI	Prof Ana I. Gomez de Castro
Abstract	AK Sco is a unique source: a ~10 Myr old pre-main-sequence (PMS) spectroscopicbinary composed of two nearly equal F5 stars that at periastron are separated bybarely 11 stellar radii. The orbit is not yet circularized (e = 0.47) and verystrong tides are expected. Previous high resolution UV spectroscopicobservations carried out with the HST/STIS have shown that there is an extendedregion with plasma at logTe (K)=4.8 reaching 1.7R*. The magnetic diffusivity inthis region is very small; unusually strong tidally modulated polarimetricvariations of the system have been detected suggesting a strong coupling betweengravitational tides and the stellar field. We propose to study the variation ofthe X-ray/UV spectrum of AK Sco as the stellar magnetospheres are modified by the tide.
Publications	XMM-Newton Monitoring of the Close Pre-main-sequence Binary AK Sco. Evidence of Tide-driven Filling of the Inner Gap in the Circumbinary Disk \|Gomez de Castro Ana I. Lopez-Santiago Javier et al. \| ApJ \| 766-62 \| 2013 \| 2013ApJ...766...62G \| http://ui.adsabs.harvard.edu/#abs/2013ApJ...766...62G 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 Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco \|Gomez de Castro Ana I. Lopez-Santiago Javier \| MNRAS \| 429-1 \| 2013 \| 2013MNRAS.429L...1G \| http://ui.adsabs.harvard.edu/#abs/2013MNRAS.429L...1G 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 X-ray emission from Ae/Be Herbig stars due to disc-stellar magnetosphere interaction \|Ryspaeva Elizaveta Kholtygin Alexander \| MNRAS \| 521-2427 \| 2023 \| 2023MNRAS.521.2427R \| http://ui.adsabs.harvard.edu/#abs/2023MNRAS.521.2427R 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	2011-03-15T21:03:32Z/2011-03-22T21:18:45Z
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	2012-04-12T00:00:00Z
Last Update	2026-07-09
Keywords	"gravitational tides", "magnetic diffusivity", "ak sco", "7r *.", "stellar field", "stellar radii", "uv spectrum", "stellar magnetosphere", "HST", "resolution uv spectroscopic", "enhanced magnetic activity"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Ana I. Gomez de Castro, 2012, 'AK Sco: enhanced magnetic activity in a pre-main sequence interacting binary', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-40d6y90
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.