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13 papers · 2 filters
Chemical abundances in the dwarf galaxy NGC 4163 based on the nebular and auroral emission lines
I. A. Zinchenko, L. S. Pilyugin
We constructed an oxygen abundance map and N/O ratio map of the unusually low excitation dwarf irregular galaxy NGC 4163 based on publicly available spectroscopy obtained by the Ma…
The Gaia-ESO Survey: Old super-metal-rich visitors from the inner Galaxy
M. L. L. Dantas, R. Smiljanic, R. Boesso +12
We report the identification of a set of old super metal-rich dwarf stars with orbits of low eccentricity that reach a maximum height from the Galactic plane between ~0.5-1.5 kpc.…
The Gaia-ESO survey: mapping the shape and evolution of the radial abundance gradients with open clusters
L. Magrini, C. Viscasillas Vazquez, L. Spina +27
The spatial distribution of elemental abundances and their time evolution are among the major constraints to disentangle the scenarios of formation and evolution of the Galaxy. We…
Metal-THINGS: The association and optical characterization of SNRs with HI holes in NGC 6946
M. A. Lara-Lopez, L. S. Pilyugin, J. Zaragoza-Cardiel +9
NGC~6946, also known as the `Fireworks' galaxy, is an unusual galaxy that hosts a total of 225 supernova remnant (SNR) candidates, including 147 optically identified with high [SII…
Calibration-based abundances in the interstellar gas of galaxies from slit and IFU spectra
Pilyugin L. S., Lara-Lopez M. A., Vilchez J. M. +3
In this work we make use of available Integral Field Unit (IFU) spectroscopy and slit spectra of several nearby galaxies. The pre-existing empirical R and S calibrations for abunda…
Improving Black Hole Accretion Treatment in Hydrodynamical Simulations
Matas Tartėnas, Kastytis Zubovas
The large galactic scales are connected to the many orders of magnitude smaller supermassive black hole (SMBH) scales by an episodic cycle of feeding and feedback. Active galactic…
The Gaia-ESO Survey: Chemical evolution of Mg and Al in the Milky Way with Machine-Learning
M. Ambrosch, G. Guiglion, Š. Mikolaitis +14
We aim to prepare the machine-learning ground for the next generation of spectroscopic surveys, such as 4MOST and WEAVE. Our goal is to show that convolutional neural networks can…
The Gaia-ESO Survey: Preparing the ground for 4MOST & WEAVE galactic surveys. Chemical evolution of lithium with machine learning
S. Nepal, G. Guiglion, R. S. de Jong +21
With its origin coming from several sources (Big Bang, stars, cosmic rays) and given its strong depletion during its stellar lifetime, the lithium element is of great interest as i…
The Gaia-ESO survey: placing constraints on the origin of r-process elements
M. Van der Swaelmen, C. Viscasillas Vázquez, G. Cescutti +19
A renewed interest about the origin of \emph{r}-process elements has been stimulated by the multi-messenger observation of the gravitational event GW170817, with the detection of b…
Determining AGN luminosity histories using present-day outflow properties: a neural-network based approach
Kastytis Zubovas, Jonas Bialopetravičius, Monika Kazlauskaitė
Large-scale outflows driven by active galactic nuclei (AGN) can have a profound influence on their host galaxies. The outflow properties themselves depend sensitively on the histor…
The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
S. Randich, G. Gilmore, L. Magrini +161
In the last 15 years different ground-based spectroscopic surveys have been started (and completed) with the general aim of delivering stellar parameters and elemental abundances f…
Mass-Metallicity and Star Formation Rate in Galaxies: a complex relation tuned to stellar age
S. Duarte Puertas, J. M. Vilchez, J. Iglesias-Páramo +5
In this work we study the stellar mass -- metallicity relation (MZR) of an extended sample of star-forming galaxies in the local Universe and its possible dependence with the star…
The Gaia-ESO Survey: Age-chemical-clock relations spatially resolved in the Galactic disc
C. Viscasillas Vázquez, L. Magrini, G. Casali +33
The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys. To complete thi…