Open Cluster Characterization via Cross-Correlation with Spectral Library

Details Open Cluster Characterization via Cross-Correlation with Spectral Library Open Cluster Characterization via Cross-Correlation with Spectral Library

2009-09-30

arxiv.org/abs/0909.5616v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

4-page paper from IAU symposium 266. Contains 3 eps figures and IAU document class file 'iau.cls'

Scientific paper

10.1017/S1743921309991694

We present a characterization method based on spectral cross-correlation to obtain the physical parameters of the controversial stellar aggregate ESO442-SC04. The data used was obtained with GMOS at Gemini-South telescope including 17 stars in the central region of the ob ject and 6 standard-stars. FXCOR was used in an iterative process to obtain self-consistent radial velocities for the standard-stars and averaged radial velocities for the science spectra. Spectral types, effective temperature, suface gravity and metallicities parameters were determined using FXCOR to correlate cluster spectra with ELODIE spectral library and selecting the best correlation matches using the Tonry and Davis Ratio (TDR). Analysis of the results suggests that the stars in ESO442-SC04 are not bound and therefore they do not constitute a physical system.

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