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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308782.0, MPI für Astronomie / Publikationen_mpia
Radial velocity variations of G and K giants
Authors:Döellinger, M. P.; Pasquini, L.; Hatzes, A.; Weiss, A.; Setiawan, J.; da Silva, L.; de Medeiros, J. R.; Girardi, L.
Publisher:Frontier Group
Date of Publication (YYYY-MM-DD):2006
Title of Proceedings:Tenth Anniversary of 51 Peg-b: Status of and prospects for hot Jupiter studies
Start Page:138
End Page:140
Name of Conference/Meeting:Tenth Anniversary of 51 Peg-b: Status of and prospects for hot Jupiter studies
Audience:Not Specified
Abstract / Description:G and K giants are a new class of radial velocity (RV) variables. In order to reveal the reasons of this variability we started in February 2004 a program to observe a northern sample of 62 K giants from the Thüringer Landessternwarte Tautenburg (TLS) with the aim of using accurate radial velocity measurements to determine the fraction of K giants showing long-term and short-period variations. Our first results show a typical RV precision of 3 to 5 m s^{-1}. About 15 % of the star sample exhibits long-term RV variations on time scales of several hundreds of days. Among these, for one program star we have a good time coverage, and the long-term variations may be due to a planetary companion.
Comment of the Author/Creator:Date: 2006, February 1, 2006
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
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