Coadded Spectroscopic Stellar Parameters and Abundances from the LAMOST Low Resolution Survey

TL;DR

This paper enhances the precision of stellar parameters and abundances by combining duplicate measurements from LAMOST DR6, resulting in improved data quality for stellar and galactic studies, and simplifies catalog cross-matching.

Contribution

It introduces a method to combine duplicate spectroscopic measurements from LAMOST DR6, improving parameter precision and facilitating catalog integration.

Findings

Twofold improvement in parameter precision

Simplified cross-matching process

Enhanced data quality for astronomical research

Abstract

I combine duplicate spectroscopic stellar parameter estimates in the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 6 Low Resolution Spectral Survey A, F, G, and K Type stellar parameter catalog. Combining repeat measurements results in a factor of two improvement in the precision of the spectroscopic stellar parameter estimates. Moreover, this trivializes the process of performing coordinate-based cross-matching with other catalogs. Similarly, I combine duplicate stellar abundance estimates for the Xiang et al. catalog which was produced using LAMOST Data Release 5 Low Resolution Spectral Survey data. These data have numerous applications in stellar, galactic, and exoplanet astronomy. The catalogs I produce are available as machine-readable tables at https://doi.org/10.7281/T1/QISGRU .