Doppler images of the RS CVn binary HR 1099 (V711 Tau) from the MUSICOS 1998 campaign^*

¹ Armagh Observatory, College Hill, Armagh BT61 9DG, N.Ireland, UK
² School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, Scotland, UK
³ Catania Astrophysical Observatory of the National Institute for Astrophysics, via S. Sofia, 78 95123 Catania, Italy
⁴ Department of Physics and Astronomy, Catania University, via S. Sofia, 78 95123 Catania, Italy

Corresponding author: D. García-Alvarez, dga@star.arm.ac.uk

Received: 13 December 2002
Accepted: 20 February 2003

Abstract

We present Doppler Images of the RS CVn binary system HR 1099 (V711 Tau) from spectra taken in two different sites, KPNO and MSO, during the MUSICOS 1998 campaign. Contemporaneous APT photometry is used to constrain the Doppler Images. The resulting maximum entropy reconstructions based on the least-squares deconvolved profiles, derived from ~2000 photospheric absorption lines, reveal the presence of starspots at medium-high latitudes. We have obtained maps for both components of the binary system for the first time. The predominant structure in the primary component is an off-centered polar spot, confirming previous works on the same target by using independent codes. The result is verified by using both data sets independently. The lower spectral resolution data set gives a less detailed map for the MSO data set. The images obtained for the secondary component show a low latitude spot around orbital phase 0.7. This spot seems to mirror the structure seen on the primary. It might suggest that tidal forces may influence the spot distribution on this binary system.