227 citations · 3.5k across the 81 of their papers we have counts for
28 papers · 1 filter
Performance of the Stellar Abundances and atmospheric Parameters Pipeline adapted for M dwarfs I. Atmospheric parameters from the spectroscopic module
Terese Olander, Matthew R. Gent, Ulrike Heiter +12
M dwarfs are important targets in the search for Earth-like exoplanets due to their small masses and low luminosities. Several ongoing and upcoming space missions are targeting M d…
ODUSSEAS: Upgraded version with new reference scale and parameter determinations for 82 planet-host M dwarf stars in SWEET-Cat
A. Antoniadis-Karnavas, S. G. Sousa, E. Delgado-Mena +2
Aims: Obtaining accurate derivations of stellar atmospheric parameters is crucial in the fields of stellar and exoplanet characterization. We present the upgraded version of our co…
Search for lithium-rich giants in 32 open clusters with high-resolution spectroscopy
M. Tsantaki, E. Delgado-Mena, D. Bossini +3
Lithium-rich giant stars are rare and their existence challenges our understanding of stellar structure and evolution. We profit from the high-quality sample gathered with HARPS an…
The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
G. Gilmore, S. Randich, C. C. Worley +165
The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100,000 stars, including large representat…
Stellar dating using chemical clocks and Bayesian inference
A. Moya, L. M. Sarro, E. Delgado-Mena +3
Dating stars is a major challenge with a deep impact on many astrophysical fields. One of the most promising techniques for this is using chemical abundances. Recent space- and gro…
Metallicities in M dwarfs: Investigating different determination techniques
V. M. Passegger, A. Bello-García, J. Ordieres-Meré +17
Deriving metallicities for solar-like stars follows well-established methods, but for cooler stars such as M dwarfs, the determination is much more complicated due to forests of mo…
The homogeneous characterisation of Ariel host stars
C. Danielski, A. Brucalassi, S. Benatti +20
The Ariel mission will characterise the chemical and thermal properties of the atmospheres of about a thousand exoplanets transiting their host star(s). The observation of such a l…
The Gaia-ESO survey: Mixing processes in low-mass stars traced by lithium abundance in cluster and field stars
L. Magrini, N. Lagarde, C. Charbonnel +42
We aim to constrain the mixing processes in low-mass stars by investigating the behaviour of the Li surface abundance after the main sequence. We take advantage of the data from th…
Stellar chromospheric activity of 1,674 FGK stars from the AMBRE-HARPS sample I. A catalogue of homogeneous chromospheric activity
J. Gomes da Silva, N. C. Santos, V. Adibekyan +9
We present a catalogue of homogeneous determined chromospheric emission (CE), stellar atmospheric parameters and ages for 1,674 FGK main sequence (MS), subgiant, and giant stars. T…
ODUSSEAS: A machine learning tool to derive effective temperature and metallicity for M dwarf stars
A. Antoniadis-Karnavas, S. G. Sousa, E. Delgado-Mena +3
Aims. The derivation of spectroscopic parameters for M dwarf stars is very important in the fields of stellar and exoplanet characterization. The goal of this work is the creation…
The Gaia-ESO Survey: a new approach to chemically characterising young open clusters
M. Baratella, V. D'Orazi, G. Carraro +33
Open clusters (OCs) are recognised as excellent tracers of Galactic thin-disc properties. At variance with intermediate-age and old OCs, for which a significant number of studies i…
The Gaia-ESO Survey: The inner disc, intermediate-age open cluster Pismis 18
D. Hatzidimitriou, E. V. Held, E. Tognelli +34
Pismis 18 is a moderately populated, intermediate-age open cluster located within the solar circle at a Galactocentric distance of about 7 kpc. Few open clusters have been studied…
On the iron ionization balance of cool stars
M. Tsantaki, N. C. Santos, S. G. Sousa +3
High-resolution spectroscopic studies of solar-type stars have revealed higher iron abundances derived from singly ionized species compared to neutral, violating the ionization equ…
The AMBRE Project: searching for the closest solar siblings
V. Adibekyan, P. de Laverny, A. Recio-Blanco +7
Finding solar siblings, that is, stars that formed in the same cluster as the Sun, will yield information about the conditions at the Sun's birthplace. We search for solar sibling…
Atmospheric stellar parameters for large surveys using FASMA, a new spectral synthesis package
M. Tsantaki, D. T. Andreasen, G. D. C. Teixeira +4
In the era of vast spectroscopic surveys focusing on Galactic stellar populations, astronomers want to exploit the large quantity and good quality of data to derive their atmospher…
SWEET-Cat update and FASMA. A new minimization procedure for stellar parameters using high-quality spectra
D. T. Andreasen, S. G. Sousa, M. Tsantaki +6
Context: Thanks to the importance that the star-planet relation has to our understanding of the planet formation process, the precise determination of stellar parameters for the ev…
Sun-like stars unlike the Sun: Clues for chemical anomalies of cool stars
V. Adibekyan, E. Delgado-Mena, S. Feltzing +11
We present a summary of the splinter session "Sun-like stars unlike the Sun" that was held on 09 June 2016 as part of the Cool Stars 19 conference (Uppsala, Sweden). We discussed t…
Abundance trend with condensation temperature for stars with different Galactic birth places
V. Adibekyan, E. Delgado-Mena, P. Figueira +9
During the past decade, several studies reported a correlation between chemical abundances of stars and condensation temperature (also known as Tc trend). However, the real astroph…
Ret, its debris disk, and its lonely stellar companion Ret. Different trends for different spectra
V. Adibekyan, E. Delgado-Mena, P. Figueira +8
Several studies have reported a correlation between the chemical abundances of stars and condensation temperature (known as Tc trend). Very recently, a strong Tc trend was reported…
Identifying the best iron-peak and -capture elements for chemical tagging: The impact of the number of lines on measured scatter
V. Adibekyan, P. Figueira, N. C. Santos +9
The main goal of this work is to explore which elements carry the most information about the birth origin of stars and as such that are best suited for chemical tagging. We explore…
Gaia FGK benchmark stars: abundances of alpha and iron-peak elements
P. Jofré, U. Heiter, C. Soubiran +26
In the current era of large spectroscopic surveys of the Milky Way, reference stars for calibrating astrophysical parameters and chemical abundances are of paramount importance. We…
Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
R. Smiljanic, A. J. Korn, M. Bergemann +99
The Gaia-ESO Survey is obtaining high-quality spectroscopic data for about 10^5 stars using FLAMES at the VLT. UVES high-resolution spectra are being collected for about 5000 FGK-t…
Spectroscopic parameters for solar-type stars with moderate/high rotation. New parameters for 10 planet-hosts
M. Tsantaki, S. G. Sousa, N. C. Santos +5
Planetary studies demand precise and accurate stellar parameters as input to infer the planetary properties. Different methods often provide different results that could lead to bi…
The Gaia-ESO Survey: metallicity of the Chamaeleon I star forming region
L. Spina, S. Randich, F. Palla +37
Context. Recent metallicity determinations in young open clusters and star-forming regions suggest that the latter may be characterized by a slightly lower metallicity than the Sun…