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2016•Astronomische NachrichtenOpen access

Gaia benchmark stars and their twins in the Gaia‐ESO Survey

P. Jofré

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Abstract

Abstract The Gaia benchmark stars are stars with very precise stellar parameters that cover a wide range in the HR diagram at various metallicities. They are meant to be good representative of typical FGK stars in the Milky Way. Currently, they are used by several spectroscopic surveys to validate and calibrate the methods that analyse the data. I review our recent activities done for these stars. Additionally, by applying our new method to find stellar twins on the Gaia‐ESO Survey, I discuss how good representatives of Milky Way stars the benchmark stars are and how they distribute in space.

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Abstract The Gaia benchmark stars are stars with very precise stellar parameters that cover a wide range in the HR diagram at various metallicities. They are meant to be good representative of typical FGK stars in the Milky Way. Currently, they are used by several spectroscopic surveys to validate and calibrate the methods that analyse the data. I review our recent activities done for these stars. Additionally, by applying our new method to find stellar twins on the Gaia‐ESO Survey, I discuss how good representatives of Milky Way stars the benchmark stars are and how they distribute in space.

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Available abstract

Abstract The Gaia benchmark stars are stars with very precise stellar parameters that cover a wide range in the HR diagram at various metallicities. They are meant to be good representative of typical FGK stars in the Milky Way. Currently, they are used by several spectroscopic surveys to validate and calibrate the methods that analyse the data. I review our recent activities done for these stars. Additionally, by applying our new method to find stellar twins on the Gaia‐ESO Survey, I discuss how good representatives of Milky Way stars the benchmark stars are and how they distribute in space.

Key concepts: Stars, Milky Way, Physics, Benchmark (surveying), Astrophysics, Astronomy, Geography, Geodesy

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