Royer, P. ; Merle, T. ; Dsilva, K. ; Sekaran, S. ; Van Winckel, H. ; Frémat, Y. ; Van der Swaelmen, M. ; Gebruers, S. ; Tkachenko, A. ; Laverick, M. ; Dirickx, M. ; Raskin, G. ; Hensberge, H. ; Abdul-Masih, M. ; Acke, B. ; Alonso, M. L. ; Bandhu Mahato, S. ; Beck, P. G. ; Behara, N. ; Bloemen, S. ; Buysschaert, B. ; Cox, N. ; Debosscher, J. ; De Cat, P. ; Degroote, P. ; De Nutte, R. ; De Smedt, K. ; de Vries, B. ; Dumortier, L. ; Escorza, A. ; Exter, K. ; Goriely, S. ; Gorlova, N. ; Hillen, M. ; Homan, W. ; Jorissen, A. ; Kamath, D. ; Karjalainen, M. ; Karjalainen, R. ; Lampens, P. ; Lobel, A. ; Lombaert, R. ; Marcos-Arenal, P. ; Menu, J. ; Merges, F. ; Moravveji, E. ; Nemeth, P. ; Neyskens, P. ; Ostensen, R. ; Pápics, P. I. ; Perez, J. ; Royer, S. ; Prins, S. ; Samadi-Ghadim, A. ; Sana, H. ; Sans Fuentes, A. ; Scaringi, S. ; Schmid, V. ; Siess, L. ; Siopis, C. ; Smolders, K. ; Sodor, S. ; Thoul, A. ; Triana, S. ; Vandenbussche, B. ; Van de Sande, M. ; Van De Steene, G. ; Van Eck, S. ; van Hoof, P. A. M. ; Van Marle, A. J. ; Van Reeth, T. ; Vermeylen, L. ; Volpi, D. ; Vos, J. ; Waelkens, C.

in press to Astronomy & Astrophysics, 681 issue A107, pp. 1--17 (2023)

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).

Keyword(s): spectral library ; spectral reference ; high resolution spectroscopy ; HRD ; instrumental response ; normalisation
DOI: 10.1051/0004-6361/202346847
Links: link; link2
Funding: Prf-2020-033_BISTRO/Prf-2020-033_BISTRO/Prf-2020-033_BISTRO