A dataset provided by the European Space Agency

Name: tau Boo.s magnetic polarity switch in X-rays - continued monitoring
Published: 2013-02-15T00:00:00Z

Proposal ID	067115
Title	tau Boo.s magnetic polarity switch in X-rays - continued monitoring
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671150501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671150601 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671150701 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671150801
DOI	https://doi.org/10.5270/esa-3vn34kl
Principal Investigator, PI	Mrs Katja Poppenhaeger
Abstract	tau Boo is the first star other than the Sun which has been observed to have aglobal magnetic field with switching polarity. In contrast to the Sun, tau Boo.smagnetic cycle has a duration of only two years. In the previous AO, we wereawarded four EPIC pointings of 8 ks each to monitor tau Boo.s activity inX-rays, backing up our observations with optical measurements of thechromospheric activity as well as Zeeman Doppler Imaging. We propose to continuemonitoring the star during this AO with XMM-Newton for a total of 32 ks as wellas with Chandra for a total of 10 ks to gain more insight into the stellaractivity cycle by comparing X-ray luminosities and coronal temperatures derivedfrom the CCD spectra to the chromospheric activity profile and the magnetic field configuration of tau Boo.
Publications	A magnetic cycle of tau Bootis? The coronal and chromospheric view \|Poppenhaeger, K., Gunther, H. M., \| AN \| 333-26 \| 2012 \| 2012AN....333...26P \| http://ui.adsabs.harvard.edu/#abs/2012AN....333...26P XMM-Newton publication statistics \|Ness, J.-U., Parmar, A. N., et al. \| AN \| 335-210 \| 2014 \| 2014AN....335..210N \| http://ui.adsabs.harvard.edu/#abs/2014AN....335..210N Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function \|Vagnetti, F., Middei, R., et al. \| A&A \| 593-55 \| 2016 \| 2016A&A...593A..55V \| http://ui.adsabs.harvard.edu/#abs/2016A&A...593A..55V 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 Four-month chromospheric and coronal activity cycle in tau Bootis \|Mittag, M., Robrade, J., et al. \| A&A \| 600-119 \| 2017 \| 2017A&A...600A.119M \| http://ui.adsabs.harvard.edu/#abs/2017A&A...600A.119M Discovery of a 23.8 h QPO in the Swift light curve of XMMU J134736.6+173403 \|Carpano, S., Jin, C., \| MNRAS \| 477-3178 \| 2018 \| 2018MNRAS.477.3178C \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.477.3178C 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 An XMM-Newton study of active-inactive galaxy pairs \|Guainazzi, Matteo, De Rosa, Alessandra, et al. \| MNRAS \| 504-393 \| 2021 \| 2021MNRAS.504..393G \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.504..393G 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 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
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2011-06-19T10:48:00Z/2012-01-20T23:07:09Z
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	2013-02-15T00:00:00Z
Keywords	"magnetic polarity switch", "xray luminosities", "coronal temperatures", "XMM-Newton", "magnetic cycle", "xmm newton", "switching polarity", "zeeman doppler imaging", "XMM", "epic pointings", "chromospheric activity profile", "EPIC", "tau boo", "ccd spectra", "chromospheric activity", "global magnetic field", "optical measurements", "magnetic field configuration", "stellar activity cycle"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Mrs Katja Poppenhaeger, 2013, 'tau Boo.s magnetic polarity switch in X-rays - continued monitoring', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3vn34kl