Observations of stellar coronae and prominences

X-ray and EUV observations of young cool stars have shown that their coronae are extremely pressured environments with temperatures and densities that are up to two orders of magnitudes larger than those observed in the solar corona. At the same time rapidly transiting absorption features in optical...

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Bibliographic Details
Published inProceedings of the International Astronomical Union Vol. 8; no. S300; pp. 309 - 317
Main Author Hussain, Gaitee A. J.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.06.2013
Subjects
Astronomical instruments
Astronomy
Contributed Papers
Cool stars
Corona
Density
Solar corona
Spectra
Stellar coronas
Temperature effects
Wavelengths
X-ray astronomy
X-rays
stars: circumstellar matter
X-rays: stars
stars: coronae
stars: activity
stars: magnetic fields
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Summary:X-ray and EUV observations of young cool stars have shown that their coronae are extremely pressured environments with temperatures and densities that are up to two orders of magnitudes larger than those observed in the solar corona. At the same time rapidly transiting absorption features in optical and UV spectra reveal the presence of large cool, prominence-type complexes that can extend several stellar radii. I will give an overview of our current understanding of coronal structures in cool stars from multi-wavelength observations, detailing their properties and apparent dependence on spectral type. I will also outline future prospects in this field, particularly from observations of stellar coronal environments at radio and sub-mm wavelengths.
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ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921313011137