Coronal properties of active G-type stars in different evolutionary phases

Giovanni Peres, Antonio Maggio, Pallavicini, Antonio Maggio, Luigi Scelsi

Risultato della ricerca: Otherpeer review


We report on the analysis of XMM-Newton observations of three G-type stars in very different evolutionary phases: the "weak-line" T Tauri star HD 283572, the Zero Age Main Sequence star EK Dra and the Hertzsprung-gap giant star 31 Corn. The X-ray luminosities of the three stars are all in the range 10(30) - 10(31) erg/s. We compare the Emission Measure Distributions of these bright sources, derived from high-resolution X-ray spectra, as well as the pattern of elemental abundances vs. First Ionization Potential (FIP). The results of our analysis suggest that the coronae of these stars are very similar in terms of dominant coronal magnetic structures, in spite of differences in their evolutionary phases, surface gravities and metallicities.
Lingua originaleEnglish
Numero di pagine4
Stato di pubblicazionePublished - 2005

All Science Journal Classification (ASJC) codes

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