681 citations · 8.1k across the 107 of their papers we have counts for
7 papers · 2 filters
Peanut-shaped metallicity distributions in bulges of edge-on galaxies: the case of NGC 4710
Oscar A. Gonzalez, Victor P. Debattista, Melissa Ness +2
Bulges of edge-on galaxies are often boxy/peanut-shaped (B/PS), and unsharp masks reveal the presence of an X shape. Simulations show that these shapes can be produced by dynamical…
Separation of Stellar Populations by an Evolving Bar: Implications for the Bulge of the Milky Way
Victor P. Debattista, Melissa Ness, Oscar A. Gonzalez +3
We present a novel interpretation of the previously puzzling different behaviours of stellar populations of the Milky Way's bulge. We first show, by means of pure N-body simulation…
A radial age gradient in the geometrically thick disk of the Milky Way
Marie Martig, Ivan Minchev, Melissa Ness +2
In the Milky Way, the thick disk can be defined using individual stellar abundances, kinematics, or age; or geometrically, as stars high above the mid-plane. In nearby galaxies, wh…
Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
Matthieu Portail, Ortwin Gerhard, Christopher Wegg +1
We construct a large set of dynamical models of the galactic bulge, bar and inner disk using the Made-to-Measure method. Our models are constrained to match the red clump giant den…
Chemical tagging with APOGEE: Discovery of a large population of N-rich stars in the inner Galaxy
Ricardo P. Schiavon, Olga Zamora, Ricardo Carrera +42
Formation of globular clusters (GCs), the Galactic bulge, or galaxy bulges in general, are important unsolved problems in Galactic astronomy. Homogeneous infrared observations of l…
The X-shaped Bulge of the Milky Way revealed by WISE
Melissa Ness, Dustin Lang
The Milky Way bulge has a boxy/peanut morphology and an X-shaped structure. This X-shape has been revealed by the `split in the red clump' from star counts along the line of sight…
Chemical tagging can work: Identification of stellar phase-space structures purely by chemical-abundance similarity
David W. Hogg, Andrew R. Casey, Melissa Ness +10
Chemical tagging promises to use detailed abundance measurements to identify spatially separated stars that were in fact born together (in the same molecular cloud), long ago. This…