125 citations · 819 across the 25 of their papers we have counts for
6 papers · 1 filter
Exploring the origin of moving groups and diagonal ridges by simulations of stellar orbits and birthplaces
Douglas A. Barros, Angeles Pérez-Villegas, Jacques R. D. Lépine +2
The present paper is the culminating one of a series aimed to contribute to the understanding of the kinematic structures of the solar neighbourhood (SN), explaining the origin of…
Chemodynamics of newly identified giants with globular cluster like abundance patterns in the bulge, disk, and halo of the Milky Way
José G. Fernández-Trincado, Timothy C. Beers, Baitian Tang +3
The latest edition of the APOGEE-2/DR14 survey catalogue and the first \texttt{Payne} data release of APOGEE abundance determinations by Ting et al. are examined. We identify 31 pr…
Discovery of a new stellar sub-population residing in the (inner) stellar halo of the Milky Way
José G. Fernández-Trincado, Timothy C. Beers, Vinicius M. Placco +8
We report the discovery of a unique collection of metal-poor giant-stars, that exhibit anomalously high levels of Si, clearly above typical Galactic levels. Our sample spans…
Dynamical Orbital classification of selected N-rich stars with \textit{Gaia} DR2 astrometry
José G. Fernández-Trincado, Leonardo Chaves-Velasquez, Angeles Pérez-Villegas +4
We have used the galaxy modeling algorithm \texttt{GravPot16}, to explore the more probable orbital elements of a sample of 64 selected N-rich stars across the Milky Way. Using the…
The moving groups as the origin of the vertical phase space spiral
Tatiana A. Michtchenko, Douglas A. Barros, Angeles Pérez-Villegas +1
Using the Gaia data release 2 (DR2), we analyzed the distribution of stars in the close vicinity of the Sun in the full 3D position-velocity space. We have found no evidence of inc…
Discovery of a nitrogen-enhanced mildly metal-poor binary system: Possible evidence for pollution from an extinct AGB Star
José G. Fernández-Trincado, Ronald Mennickent, Mauricio Cabezas +13
We report the serendipitous discovery of a nitrogen-rich, mildly metal-poor ([Fe/H]=-1.08) giant star in a single-lined spectroscopic binary system found in the SDSS-IV Apache Poin…