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

被引：59

作者：

Nordstrom, B ^{[1
]}

Stefanik, RP ^{[1
]}

Latham, DW ^{[1
]}

Andersen, J ^{[1
]}

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

来源：

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1997年 / 126卷 / 01期

关键词：

methods; statistical; techniques; radial velocities; stars; binaries; spectroscopic; kinematics; Galaxy; solar neighbourhood;

D O I：

10.1051/aas:1997248

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：21 / 30

页数：10

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