Abstract
Optical and ultraviolet data for the fast rotating giants of the FK Comae type have been analyzed to study their chromospheres and Transition Zones. From relative line intensities, electron densities of 1010 to 1011 cm−3 are found for the region where the SiIV emission arises. From the emission measure distribution, we derive an estimate of the sizes of the chromospheres and TZ of these stars. Furthermore, the emission line strengths are compared to what is expected from the rotation-activity correlation that has been established for other late-type stars.
This is a preview of subscription content, log in via an institution to check access.
Preview
Unable to display preview. Download preview PDF.
References
Bianchi,L.,Grewing,M.9.,Kappelmann,-N.,Cassatella,A.,1984,ESA SP-218,355
Bianchi,L.,Grewing,M.,Kappelmann,N.,1985,A.A.,149,49
Bopp,B.W.,Stencel,R.E.,1981,Ap.J.,247,Ll31
Bopp,B.W.,Rucinski,S.M.,1981, IAU Symp. 93,p.177
Bopp,B.W. et al.,1984,Ap.J.,285,202
Grewing,M.,Bianchi.,L.,Cassatella,A.,1985a,A.A.,preprint
Jordan,C.,Wilson,R.,l981, in ‘Physics of the solar corona',ed.C.Macris, Reidel Pub.Co.,Dordrecht,p.211
Jordan,C.,Brown,A.,1981,M.N.R.A.S.,196, 757
Linsky,J.,et al,1982,Ap.J.,260,670
Pottasch,S.R.,1964,Space Sci. Rev.,3,816
Vilhu,O.,1984,A.A.,133,117
Walter,F.M.,Basri,G.S.,1982, Ap.J.,260,735
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1986 Springer-Verlag
About this paper
Cite this paper
Bianchi, L., Grewing, M. (1986). Chromospheric and transition zone parameters in FK comae stars. In: Zeilik, M., Gibson, D.M. (eds) Cool Stars, Stellar Systems, and the Sun. Lecture Notes in Physics, vol 254. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-16763-3_160
Download citation
DOI: https://doi.org/10.1007/3-540-16763-3_160
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-16763-1
Online ISBN: 978-3-540-38731-2
eBook Packages: Springer Book Archive