314 citations · 494 across the 18 of their papers we have counts for
18 papers
Comparing phylogenetic trees of stars with spectral graph distances
Theosamuele Signor, Matias Neto, Paula Jofré +9
Phylogenetic trees offer a hierarchical representation of chemical similarities among stars, from which their evolutionary histories can, in principle, be reconstructed. Simulation…
The Twentieth Data Release of the Sloan Digital Sky Survey: First All-Sky BOSS Spectra, eROSITA-SDSS-V Mapper Coordinated Observations, and a Preview of the Local Volume Mapper
SDSS Collaboration, Mojgan Aghakhanloo, David Aguilar +273
This paper presents the twentieth data release (DR20) from the Sloan Digital Sky Survey, the third data release of its fifth generation (SDSS-V). SDSS-V is a panoptic spectroscopy…
Evidence for elemental diffusion in the eclipsing binary star AI Phoenicis
Pierre F. L. Maxted, Nicholas Storm, Andreas J. Korn +7
AI Phe is an eclipsing binary star with an orbital period of 24.6 days for which the surface gravity and effective temperature are known from direct measurements to very high preci…
Full abundance study of two newly discovered barium giants
Sara Vitali, Ana Escorza, Ditte Slumstrup +1
Barium (Ba) stars are chemically peculiar stars that show enhanced surface abundances of heavy elements produced by the slow-neutron-capture process, the so-called s-process. These…
On the evolutionary history of a simulated disc galaxy as seen by phylogenetic trees
Danielle de Brito Silva, Paula Jofré, Patricia B. Tissera +12
Phylogenetic methods have long been used in biology, and more recently have been extended to other fields - for example, linguistics and technology - to study evolutionary historie…
Assembling a high-precision abundance catalogue of solar twins in GALAH for phylogenetic studies
Kurt Walsen, Paula Jofré, Sven Buder +13
Stellar chemical abundances have proved themselves a key source of information for understanding the evolution of the Milky Way, and the scale of major stellar surveys such as GALA…
Discovery of a brown dwarf with quasi-spherical mass-loss
Dary A. Ruíz-Rodríguez, Lucas A. Cieza, Simon Casassus +14
We report the serendipitous discovery of an elliptical shell of CO associated with the faint stellar object SSTc2d J163134.1-24006 as part of the "Ophiuchus Disk Survey Employing A…
Fundamental stellar parameters of benchmark stars from CHARA interferometry -- III. Giant and subgiant stars
I. Karovicova, T. R. White, T. Nordlander +3
Large spectroscopic surveys of the Milky Way need to be calibrated against a sample of benchmark stars to ensure the reliable determination of atmospheric parameters. We present ne…
Fundamental stellar parameters of benchmark stars from CHARA interferometry -- II. Dwarf stars
I. Karovicova, T. R. White, T. Nordlander +3
Stellar models applied to large stellar surveys of the Milky Way need to be properly tested against a sample of stars with highly reliable fundamental stellar parameters. We have e…
Two sequences in the age-metallicity relation as seen from [C/N] abundances in APOGEE
Paula Jofre
The age-metallicity relation is fundamental to study the formation and evolution of the disk. Observations have shown that this relation has a large scatter which can not be explai…
The consistency of chemical clocks among coeval stars
Francisca Espinoza-Rojas, Julio Chanamé, Paula Jofré +1
The abundance ratios of some chemical species have been found to correlate with stellar age, leading to the possibility of using stellar atmospheric abundances as stellar age indic…
Host-star and exoplanet compositions: a pilot study usinga wide binary with a polluted white dwarf
Amy Bonsor, Paula Jofre, Oliver Shorttle +3
Planets and stars ultimately form out of the collapse of the same cloud of gas. Whilst planets, and planetary bodies, readily loose volatiles, a common hypothesis is that they reta…
Using heritability of stellar chemistry to reveal the history of the Milky Way
Holly Jackson, Paula Jofre, Keaghan Yaxley +3
Since chemical abundances are inherited between generations of stars, we use them to trace the evolutionary history of our Galaxy. We present a robust methodology for creating a ph…
Traits for chemical evolution in solar twins: Trends of neutron-capture elements with stellar age
Paula Jofre, Holly Jackson, Marcelo Tucci Maia
The physical processes driving chemical evolution in the Milky Way can be probed using the distribution of abundances in low-mass FGK type stars in space phase at different times.…
Galactic Phylogenetics
P. Jofre, P. Das
Phylogenetics is a widely used concept in evolutionary biology. It is the reconstruction of evolutionary history by building trees that represent branching patterns and sequences.…
Cosmic phylogeny: reconstructing the chemical history of the solar neighbourhood with an evolutionary tree
Paula Jofre, Payel Das, Jaume Bertranpetit +1
Using 17 chemical elements as a proxy for stellar DNA, we present a full phylogenetic study of stars in the solar neighbourhood. This entails applying a clustering technique that i…
The Gaia-ESO Survey: the inner disk, intermediate-age open cluster Trumpler 23
J. C. Overbeek, E. D. Friel, P. Donati +33
Context: Trumpler 23 is a moderately populated, intermediate-age open cluster within the solar circle at a Rgc ~6 kpc. It is in a crowded field very close to the Galactic plane and…
Gaia FGK Benchmark Stars - Metallicity
Paula Jofre, U. Heiter, C. Soubiran +22
To calibrate automatic pipelines that determine atmospheric parameters of stars, one needs a sample of stars -- ``benchmark stars'' -- with well defined parameters to be used as a…