| Issue |
A&A
Volume 384, Number 2, MarchIII 2002
|
|
|---|---|---|
| Page(s) | 491 - 503 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20020040 | |
| Published online | 15 March 2002 | |
Fast-rotating nearby solar-type stars *,**
I. Spectral classification, v sin i, Li abundances and X-ray luminosities
1
INAF - Catania Astrophysical Observatory, v. S. Sofia 78, 95125 Catania, Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2
INAF - Brera Astronomical Observatory, Via Bianchi 46, 22055 Merate (LC), Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
; This email address is being protected from spambots. You need JavaScript enabled to view it.
3
European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
4
University Federal of Rio Grande do Norte, Department of Physics, 59072-970 Natal, R.N., Brazil e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
5
Astronomical Observatory, NBIfAFG, Juliane Maries Vej 30, 2100 Copenhagen, Denmark e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Corresponding author: G. Cutispoto, This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
26
October
2001
Accepted:
7
January
2002
Abstract
We present the results of high-resolution spectroscopic and
high-precision photometric observations on a sample of 129 late-F and G-type
nearby stars selected on the basis of their large rotational velocity. Using
also data from the Hipparcos satellite, CORAVEL and from the ROSAT satellite
database, we infer spectral types, compute radial velocities, v sin i, Li
abundances and X-ray luminosities and investigate the single or binary nature
of the sample stars. Such a careful analysis of our sample shows a large
fraction of binaries (
62%) and of young single disk stars.
In particular, at least 9 stars can be considered bona-fide PMS or ZAMS
objects, and 30 stars are identified as SBs for the first time.
Information on the presence of Ca II K emission and
on optical variability is given for some of the stars of the sample.
Key words: stars: abundances / stars: activity / stars: fundamental parameters / stars: variables: general / X-rays: stars
Based on data collected at the European Southern Observatory, La Silla, Chile.
Tables 1, 3, 4 and 5 and the complete data set are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/384/491
© ESO, 2002
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