Results 51 to 60 of about 155,710 (341)

Milky Way's Eccentric Constituents with Gaia, APOGEE, and GALAH [PDF]

Astrophysical Journal, 2022
We report the results of an unsupervised decomposition of the local stellar halo in the chemodynamical space spanned by the abundance measurements from APOGEE DR17 and GALAH DR3.
G. Myeong, V. Belokurov, D. Aguado, N. Evans, N. Caldwell, James Bradley Harvard-Smithsonian Center for Astrophysics, I. O. Astronomy, Cambridge University, Center for Computational Astrophysics, Flatiron Institute, Dipartimento di Fisica e Astrofisica, INAFOsservatorio Astrofisico di Arcetri   +11 more
semanticscholar   +1 more source

Can Neutron Star Mergers Alone Explain the r-process Enrichment of the Milky Way? [PDF]

Astrophysical Journal Letters, 2022
Comparing Galactic chemical evolution models to the observed elemental abundances in the Milky Way, we show that neutron star mergers can be a leading r-process site only if at low metallicities such mergers have very short delay times and significant ...
C. Kobayashi, I. Mandel, K. Belczynski, S. Goriely, T. Janka, O. Just, A. Ruiter, D. Vanbeveren, M. Kruckow, M. Briel, J. Eldridge, E. Stanway   +11 more
semanticscholar   +1 more source

Chemical evolution of the Milky Way: the origin of phosphorus [PDF]

Astronomy & Astrophysics, 2012
Context. Recently, for the first time the abundance of P has been measured in disk stars. This provides the opportunity of comparing the observed abundances with predictions from theoretical models. Aims. We aim at predicting the chemical evolution of P in the Milky Way and compare our results with the observed P abundances in disk stars in order to ...
P. Francois, P. Francois, F. Matteucci, F. Matteucci, Elisabetta Caffau, Elisabetta Caffau, Gabriele Cescutti   +6 more
openaire   +6 more sources

ATLAS probe: Breakthrough science of galaxy evolution, cosmology, Milky Way, and the Solar System [PDF]

Publications Astronomical Society of Australia, 2018
Astrophysics Telescope for Large Area Spectroscopy Probe is a concept for a National Aeronautics and Space Administration probe-class space mission that will achieve ground-breaking science in the fields of galaxy evolution, cosmology, Milky Way, and the
Yun Wang, M. Dickinson, L. Hillenbrand, M. Robberto, L. Armus, M. Ballardini, R. Barkhouser, J. Bartlett, P. Behroozi, R. Benjamin, J. Brinchmann, R. Chary, C. Chuang, A. Cimatti, C. Conroy, R. Content, E. Daddi, M. Donahue, O. Doré, P. Eisenhardt, H. Ferguson, A. Faisst, W. Fraser, K. Glazebrook, V. Gorjian, G. Helou, C. Hirata, M. Hudson, J. Kirkpatrick, S. Malhotra, S. Mei, L. Moscardini, J. Newman, Z. Ninkov, Á. Orsi, M. Ressler, J. Rhoads, J. Rhodes, R. Ryan, L. Samushia, C. Scarlata, D. Scolnic, M. Seiffert, A. Shapley, S. Smee, F. Valentino, D. Vorobiev, Risa Wechsler   +47 more
semanticscholar   +1 more source

Stellar Bars in Isolated Gas-rich Spiral Galaxies Do Not Slow Down

The Astrophysical Journal, 2023
Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expected ...
Angus Beane, Lars Hernquist, Elena D’Onghia, Federico Marinacci, Charlie Conroy, Jia Qi, Laura V. Sales, Paul Torrey, Mark Vogelsberger   +8 more
doaj   +1 more source

Disentangling Stellar Age Estimates from Galactic Chemodynamical Evolution

The Astrophysical Journal, 2023
Stellar ages are key for determining the formation history of the Milky Way, but are difficult to measure precisely. Furthermore, methods that use chemical abundances to infer ages may entangle the intrinsic evolution of stars with the chemodynamical ...
Jeff Shen, Joshua S. Speagle, J. Ted Mackereth, Yuan-Sen Ting, Jo Bovy   +4 more
doaj   +1 more source

The effect of the deforming dark matter haloes of the Milky Way and the Large Magellanic Cloud on the Orphan-Chenab stream [PDF]

, 2022
It has recently been shown that the Large Magellanic Cloud (LMC) has a substantial effect on the Milky Way’s stellar halo and stellar streams. Here, we explore how deformations of the Milky Way and LMC’s dark matter haloes affect stellar streams, and ...
Sophia Lilleengen, M. Petersen, D. Erkal, J. Peñarrubia, Sergey E. Koposov, Ting S. Li, L. Cullinane, A. Ji, K. Kuehn, G. Lewis, D. Mackey, A. Pace, N. Shipp, D. Zucker, J. Bland-Hawthorn, T. Hilmi   +15 more
semanticscholar   +1 more source

Widespread Detection of Two Components in the Hot Circumgalactic Medium of the Milky Way [PDF]

Astrophysical Journal, 2022
Surrounding the Milky Way (MW) is the circumgalactic medium (CGM), an extended reservoir of hot gas that has significant implications for the evolution of the MW.
J. Bluem, P. Kaaret, K. Kuntz, K. Jahoda, D. Koutroumpa, E. Hodges-Kluck, Chase A. Fuller, D. LaRocca, A. Zajczyk   +8 more
semanticscholar   +1 more source

The AMBRE Project: Origin and evolution of sulfur in the Milky Way [PDF]

Astronomy & Astrophysics, 2021
Context. Sulfur is a volatile chemical element that plays an important role in tracing the chemical evolution of the Milky Way and external galaxies. However, its nucleosynthesis origin and abundance variations in the Galaxy are still unclear because the number of available stellar sulfur abundance measurements is currently rather small. Aims. The goal
Perdigon, J., de Laverny, P., Recio-Blanco, A., Fernandez-Alvar, E., Santos-Peral, P., Kordopatis, G., Álvarez, M. A.   +6 more
openaire   +5 more sources

The Formalism of Milky-Way Antimatter-Domains Evolution

Galaxies, 2023
If baryosynthesis is strongly nonhomogeneous, macroscopic regions with antibaryon excess can be created in the same process from which the baryonic matter is originated. This exotic possibility can become real, if the hints to the existence of antihelium
Maxim Yu. Khlopov, Orchidea Maria Lecian
doaj   +1 more source