A dataset provided by the European Space Agency

Name 067115
Title tau Boo.s magnetic polarity switch in X-rays - continued monitoring


DOI https://doi.org/10.5270/esa-3vn34kl
Author Mrs Katja Poppenhaeger
Description tau Boo is the first star other than the Sun which has been observed to have a global magnetic field with switching polarity. In contrast to the Sun, tau Boo.s magnetic cycle has a duration of only two years. In the previous AO, we were awarded four EPIC pointings of 8 ks each to monitor tau Boo.s activity in X-rays, backing up our observations with optical measurements of the chromospheric activity as well as Zeeman Doppler Imaging. We propose to continue monitoring the star during this AO with XMM-Newton for a total of 32 ks as well as with Chandra for a total of 10 ks to gain more insight into the stellar activity cycle by comparing X-ray luminosities and coronal temperatures derived from the CCD spectra to the chromospheric activity profile and the magnetic field configuration of tau Boo.
Publication No observations found associated with the current proposal
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 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 2013-02-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-02-15T00:00:00Z, 067115, 17.56_20190403_1200. https://doi.org/10.5270/esa-3vn34kl