We review the mechanisms which have been proposed for the heating of stellar
chromospheres and coronae. These consist of heating by acoustic waves, by slow and fast …

This book is the final one in a series of three texts which together provide a modern,
complete and authoritative account of our present knowledge of the stars. It discusses the …

Tight power-law relations between chromospheric, transition-region, and coronal surface
flux densities of late-type stars are obtained, provided that a lower-limit flux φ is subtracted …

The FK Comae stars ADS Classic is now deprecated. It will be completely retired in October
2019. This page will automatically redirect to the new ADS interface at that point. SAO/NASA …

This paper reviews observational evidence concerning the existence of so-called basal
heating that occurs in the outer atmospheres of all stars with convective envelopes. Effects of …

Five main-sequence stars, χ 1 Ori (G0V), α Cen A (G2V), ξ Boo A (G8V), α Cen B (K0V) and ε
Eri (K2V) have been observed at low and high dispersion with the International Ultraviolet …

This book provides an introduction to our current knowledge of stellar magnetic activity. It is
intended for graduate or advanced undergraduate students or researchers new to the field …

We calculate time-dependent models of acoustically heated chromospheres for main-
sequence stars between spectral type F0 V and M0 V and for two giants of spectral type K0 …

Of a total of 177 cool G, K and M giants and supergiants, we measured the Mg ii h+ k line
emission of extended chromospheres in high-resolution (LWR) International Ultraviolet …

We present results of pointed ROSAT PSPC observations of 15 hybrid stars/candidates,
which have been analyzed in a homogenous way. 7 of these stars were observed in X-rays …