MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy
Abstract
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).
Keywords
Cite
@article{arxiv.2311.02705,
title = {MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy},
author = {P. Royer and T. Merle and K. Dsilva and S. Sekaran and H. Van Winckel and Y. Frémat and M. Van der Swaelmen and S. Gebruers and A. Tkachenko and M. Laverick and M. Dirickx and G. Raskin and H. Hensberge and M. Abdul-Masih and B. Acke and M. L. Alonso and S. Bandhu Mahato and P. G. Beck and N. Behara and S. Bloemen and B. Buysschaert and N. Cox and J. Debosscher and P. De Cat and P. Degroote and R. De Nutte and K. De Smedt and B. de Vries and L. Dumortier and A. Escorza and K. Exter and S. Goriely and N. Gorlova and M. Hillen and W. Homan and A. Jorissen and D. Kamath and M. Karjalainen and R. Karjalainen and P. Lampens and A. Lobel and R. Lombaert and P. Marcos-Arenal and J. Menu and F. Merges and E. Moravveji and P. Nemeth and P. Neyskens and R. Ostensen and P. I. Pápics and J. Perez and S. Prins S. Royer and A. Samadi-Ghadim and H. Sana and A. Sans Fuentes and S. Scaringi and V. Schmid and L. Siess and C. Siopis and K. Smolders and S. Sodor and A. Thoul and S. Triana and B. Vandenbussche and M. Van de Sande and G. Van De Steene and S. Van Eck and P. A. M. van Hoof and A. J. Van Marle and T. Van Reeth and L. Vermeylen and D. Volpi and J. Vos and C. Waelkens},
journal= {arXiv preprint arXiv:2311.02705},
year = {2024}
}
Comments
17 pages, 18 figures Preview and access to the library: https://www.royer.se/melchiors.html