De Medeiros, Jose Renan

Contact Email: renan@dfte.ufrn.br
Institute: Departamento de Fisica / Universidade Federal do Rio
Grande do Norte Natal, RN, Brazil
Subject Area: Surveys & Catalogs
Waveband: Optical
Technique: Spectroscopy
Presentation: Poster Display
Title: 1) Accurate VSINI measurements in M67 : The angular momentum evolution of 1.3Mo stars ( J. R. De Medeiros, L. Pasquini and C. Melo)
Abstract: Accurate VSINI measurements in M67 : The angular momentum evolution of $1.3M\odot$ stars. By using FEROS spectrometer commissioning observations we constructed a calibration of the FEROS cross-correlation function to determine accurate VSINI for slow rotating F-K dwarf and giant stars. The calibration is applied to a sample of 28 stars from main sequence, turnoff and giant regions of the old open cluster M67. The rotational behavior for these stars is presented along a Color-Magnitude diagram.