A dataset provided by the European Space Agency

Name: EF Eridani in the low state
Published: 2012-02-03T00:00:00Z

Proposal ID	065229
Title	EF Eridani in the low state
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0652290101
DOI	https://doi.org/10.5270/esa-3hul3td
Principal Investigator, PI	Prof Frederick Walter
Abstract	The polar EF Eridani (2A 0311-227) was once one of the brightest soft X-raysources in the sky. For the past decade it has been in an extended inactivestate (with the exception of occasional short burps). We seek to study theresidual X-ray activity in this system. The data suggest that the residualoptical activity occurs either on the irradiated surface of the substellar masscompanion or in a coupling region where the secondarys wind and/or its magneticfield interacts with the megaGauss field of the white dwarf. X-ray observationswill provide important clues to the magnetic geometry of polars, and the physicsof the coupling region.
Publications	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 Quasi-periodic oscillations in accreting magnetic white dwarfs. I. Observational constraints in X-ray and optical \|Bonnet-Bidaud J. M. Mouchet M. et al. \| A&A \| 579-24 \| 2015 \| 2015A&A...579A..24B \| http://ui.adsabs.harvard.edu/#abs/2015A&A...579A..24B 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 Numerical simulations of high-energy flows in accreting magnetic white dwarfs \|Van Box Som Lucile Falize E. et al. \| MNRAS \| 473-3158 \| 2018 \| 2018MNRAS.473.3158V \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.473.3158V 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 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	2011-01-15T08:10:05Z/2011-01-16T04:06:07Z
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	2012-02-03T00:00:00Z
Last Update	2025-01-27
Keywords	"residual xray activity", "irradiated surface", "burps ".", "past decade", "occasional short", "ef eridani", "magnetic geometry", "megagauss field", "white dwarf", "coupling region", "magnetic field interacts", "substellar mass companion"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Frederick Walter, 2012, 'EF Eridani in the low state', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3hul3td