A&A Supplement series, Vol. 127, Mars II 1998, 485-495
Received June 20; accepted August 12, 1997
D. Montes - E.L. Martın
Send offprint request: D. Montes (firstname.lastname@example.org)
Departamento de Astrofısica, Facultad de Fısicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
Pennsylvania State University, Department of Astronomy & Astrophisics, 525 Davey Lab., University Park, PA 16802, U.S.A.
Instituto de Astrofısica de Canarias, E-38200 La Laguna, Tenerife, Spain
University of California at Berkeley, Department of Astronomy, Berkeley, CA 94720, U.S.A.
We present a library of Utrecht echelle spectrograph (UES) observations of a sample of F, G, K and M field dwarf stars covering the spectral range from 4800 to 10600 with a resolution of 55000. These spectra include some of the spectral lines most widely used as optical and near-infrared indicators of chromospheric activity such as H, Mg I b triplet, Na I D1, D2, He I D3, H, and Ca II IRT lines, as well as a large number of photospheric lines which can also be affected by chromospheric activity. The spectra have been compiled with the aim of providing a set of standards observed at high-resolution to be used in the application of the spectral subtraction technique to obtain the active-chromosphere contribution to these lines in chromospherically active single and binary stars. This library can also be used for spectral classification purposes. A digital version with all the spectra is available via ftp and the World Wide Web (WWW) in both ASCII and FITS formats.
keywords: Atlases -- stars: activity -- stars: chromospheres -- stars: late-type -- stars: fundamental parameters -- stars: general