Free access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 126, Number 1, November_II 1997
Page(s) 21 - 30
DOI http://dx.doi.org/10.1051/aas:1997248
DOI: 10.1051/aas:1997248

A&A Supplement Series, Vol. 126, November II 1997, 21-30

Received October 9, 1996; accepted February 17, 1997

Radial velocities, rotations, and duplicity of a sample of early F-type dwarfsgif

B. Nordströmtex2html_wrap594 - R.P. Stefanik tex2html_wrap596 - D.W. Latham tex2html_wrap596 - J. Andersen tex2html_wrap594

Send offprint request: B. Nordström (Danish address):       E-mail: birgitta@astro.ku.dk
tex2html_wrap602  Astronomical Observatory, Niels Bohr Institute for Astronomy, Physics & Geophysics, Juliane Maries Vej 30, DK - 2100 Copenhagen, Denmark
tex2html_wrap602  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, U.S.A.

Abstract:

We present new radial and rotational velocities for 595 nearby early F dwarfs, based on digital spectra cross-correlated with individually optimised synthetic template spectra. The selection of optimum templates, the determination of rotational velocities, and the extraction of velocities from the blended spectra of double-lined spectroscopic binaries are discussed in some detail. We find 170 spectroscopic binaries in the sample and determine orbits for 18 double-lined and 2 single-lined binaries, including some spectroscopic triples. 73 stars are listed with too rapid rotation to yield useful radial velocities (i.e. v sin i  > 120 km s-1). We discuss the binary frequency in the sample, and the influence of unrecognised binaries on the definition of clean metallicity groups of young F dwarfs and the determination of their kinematical properties.

keywords: methods: statistical -- techniques: radial velocities -- stars: binaries: spectroscopic -- stars: kinematics -- Galaxy: solar neighbourhood

SIMBAD Objects
Tables at the CDS

Copyright by the European Southern Observatory (ESO)
web@ed-phys.fr

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.