A dataset provided by the European Space Agency

Name 000822
Title The coronae of Hertzsprung gap giants


DOI https://doi.org/10.5270/esa-i2mf07y
Author Dr Philippe Gondoin
Description For a total of 114 ksec, we propose to collect high quality spectra of an homogeneous sample of 2.5 to 3 solar mass giants carefully selected at different evolutionary stages across the Herzsprung gap. From the analysis of these spectra, emission volumes and electron densities at different temperatures could be derived which allow to estimate the electron pressures and the magnetic field strengths that are required to confine the plasmas. By comparing different stars with different evolutionary status across the Hertzprung gap, we would measure the structural modification of the coronae of giants during the rapid deepening of their convective zones, thus providing observational constraints on their dynamos.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-01-09T16:59:12Z/2001-01-10T04:49:22Z
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 2002-03-23T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2002-03-23T00:00:00Z, 000822, 17.56_20190403_1200. https://doi.org/10.5270/esa-i2mf07y