Atomic lines in infrared spectra for ultracool dwarfs ^*,**

¹ Main Astronomical Observatory of Academy of Sciences of Ukraine, Golosiiv woods, Kyiv-127, 03680 Ukraine
² Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK
³ CNR-Instituto di Fisica dello Spazio Interplanetario, Area di Ricerca di Tor Vergata, via del fosso del Cavaliere 100, 00133 Roma, Italy
⁴ Dept of Physics and Astronomy, University College London, Gower St., London WC1E 6BT, UK
⁵ Blackett Laboratory, Imperial College, Prince Consort Rd, London SW7 2BW, UK

Corresponding author: Y. Lyubchik, lyu@mao.kiev.ua

Received: 30 September 2003
Accepted: 26 November 2003

Abstract

We provide a set of atomic lines which are suitable for the description of ultracool dwarf spectra from 10 000 to 25 000 Å. This atomic linelist was made using both synthetic spectra calculations and existing atlases of infrared spectra of Arcturus and Sunspot umbra. We present plots which show the comparison of synthetic spectra and observed Arcturus and Sunspot umbral spectra for all atomic lines likely to be observable in high resolution infrared spectra.