Magnetic confinement of dense plasma inside (and outside) stellar coronae

Physics of Stellar Coronae

Solar and Stellar Coronae

The existence of hot coronae throughout the HR diagram has been proved by the observations of the Einstein observatory since the late 1970's This nding has stimulated a new interest in the study of stellar activity. The general picture relating stellar activity in late type stars to the internal generation, photospheric emergence, and chromospheric and coronal dissipation of magnetic elds, was ...

The Density of Coronal Plasma in Active Stellar Coronae

We have analyzed high-resolution X-ray spectra of a sample of 22 active stars observed with the High Energy Transmission Grating Spectrometer on Chandra in order to investigate their coronal plasma density. Densities where investigated using the lines of the He-like ions O VII, Mg XI, and Si XIII. Si XIII lines in all stars of the sample are compatible with the low-density limit (i.e. ne . 10 1...

In-Between Space, Dialectic of Inside and Outside in Architecture

Defining space by dividing it to inside and outside is one of human’s ways to recognize his positionin environment. Architecture is created to response to this need for inside/outside spaces. Design of inside and outsideSpaces and relation between them always has been one of necessities for definition and limitation of human livingspaces, but little attention to relation of this two spatial rea...

Magnetic Arcades in Stellar Coronae. I. Cylindrical Geometry

X-ray spectroscopy performed by diierent astronomical spacecrafts has shown that many active late-type stars possess coronae. For such reason, the magnetic structure of stellar coronae has raised considerable interest and, by analogy with the Sun, it is generally assumed that stellar coronae are structured by magnetic elds having the shape of arcades. Most of those coronal magnetic eld conngura...