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Pradosh Barun

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The GALAH Survey: Stellar parameters and abundances for 800,000 Gaia RVS spectra using GALAH DR4 and The Cannon

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By De Vasconcelos Silva, Lund Observatory, Pupin Physics Laboratories, Pradosh Barun
| Oxford Academic Verified
Analysing stellar parameters and abundances from nearly one million Gaia DR3 Radial Velocity Spectrometer (RVS) spectra poses challenges due to the limited spectral coverage (restricted to the infrared Ca ii triplet) and variable signal-to-noise ratios of the data. To address this, we use The Cannon, a data-driven method, to transfer stellar parameters and abundances from the GALAH Data Release 4 (DR4; R ∼ 28 000) catalogue to the lower resolution Gaia DR3 RVS spectra (R ∼ 11,500).
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