MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy
Creators: name: Royer, P.
name: Merle, T.
name: Dsilva, K.
name: Sekaran, S.
name: Van Winckel, H.
name: Frémat, Y.
name: Van der Swaelmen, M.
name: Gebruers, S.
name: Tkachenko, A.
name: Laverick, M.
name: Dirickx, M.
name: Raskin, G.
name: Hensberge, H.
name: Abdul-Masih, M.
name: Acke, B.
name: Alonso, M. L.
name: Mahato, S. Bandhu
name: Beck, P. G.
name: Behara, N.
name: Bloemen, S.
name: Buysschaert, B.
name: Cox, N.
name: Debosscher, J.
name: De Cat, P.
name: Degroote, P.
name: De Nutte, R.
name: De Smedt, K.
name: de Vries, B.
name: Dumortier, L.
name: Escorza, A.
name: Exter, K.
name: Goriely, S.
name: Gorlova, N.
name: Hillen, M.
name: Homan, W.
name: Jorissen, A.
name: Kamath, D.
name: Karjalainen, M.
name: Karjalainen, R.
name: Lampens, P.
name: Lobel, A.
name: Lombaert, R.
name: Marcos-Arenal, P.
name: Menu, J.
name: Merges, F.
name: Moravveji, E.
name: Nemeth, P.
name: Neyskens, P.
name: Ostensen, R.
name: Pápics, P. I.
name: Perez, J.
name: Royer, S. Prins S.
name: Samadi-Ghadim, A.
name: Sana, H.
name: Fuentes, A. Sans
name: Scaringi, S.
name: Schmid, V.
name: Siess, L.
name: Siopis, C.
name: Smolders, K.
name: Sodor, S.
name: Thoul, A.
name: Triana, S.
name: Vandenbussche, B.
name: Van de Sande, M.
name: Van De Steene, G.
name: Van Eck, S.
name: van Hoof, P. A. M.
name: Van Marle, A. J.
name: Van Reeth, T.
name: Vermeylen, L.
name: Volpi, D.
name: Vos, J.
name: Waelkens, C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Over the past decades, libraries of stellar spectra have been used in a large variety of science cases, including as sources of reference spectra for a given object or a given spectral type. Despite the existence of large libraries and the increasing number of projects of large-scale spectral surveys, there is to date only one very high-resolution spectral library offering spectra from a few hundred objects from the southern hemisphere (UVES-POP) . We aim to extend the sample, offering a finer coverage of effective temperatures and surface gravity with a uniform collection of spectra obtained in the northern hemisphere.
 Between 2010 and 2020, we acquired several thousand echelle spectra of bright stars with the Mercator-HERMES spectrograph located in the Roque de Los Muchachos Observatory in La Palma, whose pipeline offers high-quality data reduction products. We have also developed methods to correct for the instrumental response in order to approach the true shape of the spectral continuum. Additionally, we have devised a normalisation process to provide a homogeneous normalisation of the full spectral range for most of the objects.
 We present a new spectral library consisting of 3256 spectra covering 2043 stars. It combines high signal-to-noise and high spectral resolution over the entire range of effective temperatures and luminosity classes. The spectra are presented in four versions: raw, corrected from the instrumental response, with and without correction from the atmospheric molecular absorption, and normalised (including the telluric correction).
description: 17 pages, 18 figures Preview and access to the library: https://www.royer.se/melchiors.html