A dataset provided by the European Space Agency

Name 055112
Title Stellar magnetic fields: From the photosphere into the corona
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551120201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551120301
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551120401

DOI 10.5270/esa-1i3sofu
Author Ms Carolin Liefke
Description Simultaneous X-ray and optical observations of the active M dwarf CN Leo have shown variability in its magnetic flux (as measured through magnetically sensitive lines in the molecular FeH band) on different timescales: within a few days, within one night, and possibly even related to a flare event. We propose to extend these studies to a larger sample of stars and observe the two flare stars Proxima Cen and YZ CMi simultaneously with XMM-Newton and VLT-UVES in order to characterize the amplitudes and time scales of variations in their photospheric magnetic fields together with the behavior of chromospheric emission lines and coronal X-ray emission. This will enable us to trace activity-related changes in the stellar magnetic field through all layers of the stellar atmosphere.
Publication Multi-wavelength observations of Proxima Centauri . Fuhrmeister, B., Lalitha, S., et all. . A&A . 534-133 . 2011 . 2011A&A...534A.133F ,
An XMM-Newton Survey of the Soft X-Ray Background. II. An All-Sky Catalog of Diffuse O VII and O VIII Emission Intensities . Henley, David B., Shelton, Robin L., . ApJS . 202-14 . 2012 . 2012ApJS..202...14H ,
Evidence of Multiple Slow Acoustic Oscillations in the Stellar Flaring Loops of Proxima Centauri . Srivastava, A. K., Lalitha, S., . ApJ . 778-28 . 2013 . 2013ApJ...778L..28S ,
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 ,
The Interaction of the Fermi Bubbles with the Milky Way.s Hot Gas Halo . Miller, Matthew J., Bregman, Joel N., . ApJ . 829-9 . 2016 . 2016ApJ...829....9M ,
Comparison of Damped Oscillations in Solar and Stellar X-Ray flares . Cho, I.-H., Cho, K.-S., et all. . ApJ . 830-110 . 2016 . 2016ApJ...830..110C ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
Optical, UV, and X-ray evidence for a 7-yr stellar cycle in Proxima Centauri . Wargelin, B. J., Saar, S. H., et all. . MNRAS . 464-3281 . 2017 . 2017MNRAS.464.3281W ,
The habitability of Proxima Centauri b. I. ...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2009-03-10T02:40:59Z/2009-03-14T10:40:06Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 2010-03-31T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2010-03-31T00:00:00Z, 055112, 17.56_20190403_1200. https://doi.org/10.5270/esa-1i3sofu