TZ Fornacis: an eclipsing Cappella-like system observed with the IUE

Details TZ Fornacis: an eclipsing Cappella-like system observed with the IUE TZ Fornacis: an eclipsing Cappella-like system observed with the IUE

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..225e&link_type=abstract

In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 225-22

Astronomy and Astrophysics

Astrophysics

5

Chromosphere, Eclipsing Binary Stars, Iue, Giant Stars, Stellar Activity, Stellar Spectra

Scientific paper

The IUE observed TZ Fornacis at orbital phases 0.0, 0.25 and 0.79 in 1986. Most of the exposures were LWP-HI or SWP-LO. Results show that: the surface fluxes for transition region emission lines are similar to those for the Capella system while that of the Mg II emission is smaller; the total flux in the Mg II emission lines is constant with phase, whereas the flux in the C IV emission lines decreases by 1/3 during primary eclipse, indicating that most of the activity is due to the hotter giant (F7 III), which is also the case for Capella.

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