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2025RNAAS...9...63H - Research Notes of the AAS, 9, 63 (2025/March-0)

NEIDSpecMatch: Stellar Parameter Estimation with NEID Spectra Using an Empirical Library.

HAN T., ROBERTSON P., CANAS C.I., STEFANSSON G., KANODIA S., NINAN J.P., ALVARADO-MONTES J.A., BENDER C.F., DONG J., FERNANDES R., GUPTA A.F., HALVERSON S., KROLIKOWSKI D.M., LIN A.S.J., MAHADEVAN S., PAREDES L.A., ROY A., SCHWAB C. and TERRIEN R.C.

Abstract (from CDS):

We introduce NEIDSpecMatch, a tool developed to extract stellar parameters from spectra obtained with the NEID spectrograph. NEIDSpecMatch is based on SpecMatch-Emp and HPFSpecMatch, which estimate stellar parameters by comparing the observed spectrum to well-characterized library spectra. This approach has proven effective for M dwarfs. Utilizing a library of 78 stellar spectra covering effective temperatures from 3000-6000 K, NEIDSpecMatch derives key parameters, including effective temperature, metallicity, surface gravity, and projected rotational velocity. Cross-validation shows median uncertainties of ${\sigma }_{{T}_{{\rm{eff}}}}=115\,{\rm{K}}$, σ[Fe/H] = 0.143, and ${\sigma }_{\mathrm{log}g}=0.073$ across 49 orders. We showcase its application by fitting the spectrum of an M-dwarf and discuss its utility across a wide range of spectra observed with NEID. NEIDSpecMatch is pip-installable.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar properties - Spectroscopy - Astronomical instrumentation

Simbad objects: 7

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