J/A+A/704/A49 AMBRE/FEROS catalogue of line-broadening velocities (Bado+, 2025)
The AMBRE Project: Line-broadening and stellar rotation of ESO/FEROS archived
spectra.
Bado F., de Laverny P., Kam Z., Recio-Blanco A., Palicio P.A., Koulidiati J.
<Astron. Astrophys. 704, A49 (2025)>
=2025A&A...704A..49B 2025A&A...704A..49B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, F-type ; Stars, G-type ; Stars, K-type ; Stars, M-type ;
Rotational velocities ; Abundances ; Optical
Keywords: line: profiles - catalogs - stars: rotation
Abstract:
Stellar rotation is a fundamental parameter in studies of the
formation and evolution of stars. However, large homogeneous
catalogues of rotational velocities derived from high-resolution
stellar spectra are still lacking.
The main objective of this work is to determine the line-broadening
parameter (Vbroad), which is a proxy of stellar rotational velocity,
for a large sample of FGKM stars from their ESO/FEROS spectra. All
these stars were previously parameterised by the AMBRE Project.
The line-broadening parameter is estimated by cross-correlating the
FEROS spectra with binary masks, specifically chosen thanks to AMBRE
stellar parameters. This methodology also relies on a specific
calibration of a coupling constant between the rotational velocity and
the width of the cross-correlation function. This fundamental step was
performed by adopting the AMBRE grid of synthetic spectra. The derived
Vbroad were then validated using literature, ground-based
spectroscopic surveys, and Gaia/RVS data.
After analysing more than 5,000 FEROS spectra (including repeated
spectra for several stars), we provide the line-broadening coefficient
for 2,584 stars covering the FGKM spectral types, any stellar gravity,
and metallicities between the metal-poor up to sub-Solar regimes. The
mean Vbroad relative uncertainty of this sample is found to be smaller
than 8%. As expected, most stars are found to be slow rotators (below
a few km/s), in particular cool dwarfs and giants. A few hot dwarfs
and high-luminosity stars with high-Vbroad rates are however
identified, most of them being unknown as fast rotators and/or
affected by large macro-turbulent effects before this work.
The measured rotational broadening values are of high-quality, based
on literature comparisons. We provide this catalogue of
line-broadening parameters, including stellar atmospheric and quality
parameters, for the analysed AMBRE/FEROS sources.
Description:
The AMBRE/FEROS catalogue of line-broadening velocities.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 79 2584 AMBRE/FEROS catalogue of line-broadening velocities
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See also:
J/A+A/542/A48 : AMBRE project. FEROS archived spectra (Worley+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 28 A28 --- Name Star Name (GaiaDR3or_HD)
30- 33 I4 K Teff Effective temperature
35- 38 F4.2 [cm/s2] logg Stellar surface gravity in log scale
40- 44 F5.2 [-] [M/H] Stellar mean metallicity
46- 50 F5.2 [-] [alpha/Fe] Abundances ratio [alpha/Fe]
52 A1 --- l_Vbroad Upper limit flag for Vbroad is derived
53- 57 F5.2 km/s Vbroad Line-broadening velocity
59- 63 F5.2 km/s e_Vbroad ? Vbroad uncertainty
65- 69 F5.1 --- SNR Spectra signal-to-noise ratio
71- 77 F7.2 --- chi2 ? Indicator of the AMBRE parametrisation
quality
79 A1 --- HQ [Y/N] Y' if High-Quality measurement
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Acknowledgements:
Patrick de laverny, patrick.de_laverny(at)oca.eu
(End) Patricia Vannier [CDS] 14-Oct-2025