MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy

0582367 - ASÚ 2025 RIV FR eng J - Journal Article
Royer, P. - Merle, T. - Dsilva, K. - Karjalainen, Marie - Karjalainen, Raine - Németh, Péter - Vos, Joris … Total 75 authors
MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy.
Astronomy & Astrophysics. Roč. 681, January (2024), č. článku A107. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR(CZ) GA22-34467S; GA MŠMT(CZ) LTT20015
Institutional support: RVO:67985815
Keywords : stars * atmospheric effects * data analysis
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 6.5, year: 2022
Method of publishing: Open access

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.Methods. 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.Results. 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).
Permanent Link: https://hdl.handle.net/11104/0353558