EXPORT: Spectral classification and projected rotational velocities of Vega-type and pre-main sequence stars ^*,**

¹ Departamento de Física Teórica, Módulo C-XI, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Cantoblanco, Madrid, Spain
² Laboratorio de Astrofísica Espacial y Física Fundamental (LAEFF), Apartado de Correos 50727, 28080 Madrid, Spain
³ Instituto de Astrofísica de Andalucía-CSIC, Apartado de Correos 3004, 18080 Granada, Spain
⁴ TNO/TPD-Space Instrumentation, Stieltjesweg 1, PO Box 155, 2600 AD Delft, The Netherlands
⁵ CNRS, Institut d'Astrophysique de Paris, 98bis Bld. Arago, 75014 Paris, France
⁶ NOAO/STIS, Goddard Space Flight Center, Code 681, NASA/GSFC, Greenbelt, MD 20771, USA
⁷ Joint Astronomy Centre, 660 N. A'ohoku Place, Hilo, Hawaii 96720, USA
⁸ Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
⁹ Department of Physics, Center for Astrophysics and Space Sciences, University of California San Diego, Mail Code 0424, La Jolla, CA 92093-0424, USA
¹⁰ DLR Department of Planetary Exploration, Rutherfordstrasse 2, 12489 Berlin, Germany
¹¹ Department of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, Scotland, UK
¹² Instituto de Astrofísica de Canarias, c/Via Láctea s/n, 38200 La Laguna, Tenerife, Spain
¹³ Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
¹⁴ Observatoire de Paris, place Jules Janssen, 92195 Meudon, France
¹⁵ SRON, Universiteitscomplex "Zernike", Landleven 12, PO Box 800, 9700 AV Groningen, The Netherlands

Corresponding author: A. Mora, alcione.mora@uam.es

Received: 2 April 2001
Accepted: 30 July 2001

Abstract

In this paper we present the first comprehensive results extracted from the spectroscopic campaigns carried out by the EXPORT (EXoPlanetary Observational Research Team) consortium. During 1998-1999, EXPORT carried out an intensive observational effort in the framework of the origin and evolution of protoplanetary systems in order to obtain clues on the evolutionary path from the early stages of the pre-main sequence to stars with planets already formed. The spectral types of 70 stars, and the projected rotational velocities, , of 45 stars, mainly Vega-type and pre-main sequence, have been determined from intermediate- and high-resolution spectroscopy, respectively. The first part of the work is of fundamental importance in order to accurately place the stars in the HR diagram and determine the evolutionary sequences; the second part provides information on the kinematics and dynamics of the stars and the evolution of their angular momentum. The advantage of using the same observational configuration and methodology for all the stars is the homogeneity of the set of parameters obtained. Results from previous work are revised, leading in some cases to completely new determinations of spectral types and projected rotational velocities; for some stars no previous studies were available.