Velocities and duplicity of F-type dwarfs (Nordstroem+ 1997)

Details Velocities and duplicity of F-type dwarfs (Nordstroem+ 1997) Velocities and duplicity of F-type dwarfs (Nordstroem+ 1997)

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat..41260021n&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/126/21. Originally published in: 1997A&AS..126...21N

Physics

Stars: Dwarfs, Rotational Velocities, Radial Velocities

Scientific paper

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. vsini>120km/s). 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. (5 data files).

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