The role of neutron star mergers in the chemical evolution of the Galactic halo [PDF]
, 2015 Aims. We explore the problem of the site of production of Eu. We use also the information present in the observed spread in the Eu abundances in the early Galaxy, not only its average trend.
G. Cescutti +6 more
semanticscholar +1 more source
The Huge Magnetic Toroids in the Milky Way Halo
The Astrophysical JournalThe magnetic fields in our Milky Way can be revealed by the distribution of Faraday rotation measures (RMs) of radio sources behind the Galaxy and of radio pulsars inside the Galaxy. Based on the antisymmetry of the Faraday sky in the inner Galaxy to the
J. Xu, J. L. Han
doaj +1 more source
NEUTRON STAR MERGERS AS THE ORIGIN OF r-PROCESS ELEMENTS IN THE GALACTIC HALO BASED ON THE SUB-HALO CLUSTERING SCENARIO [PDF]
, 2015 Recent hydrodynamical and nucleosynthesis studies have suggested binary mergers (NSMs) of double neutron star (and black-hole–neutron-star) systems as major sites of r-process elements in the Galaxy.
Y. Ishimaru, S. Wanajo, N. Prantzos
semanticscholar +1 more source
The role of binaries in the enrichment of the early Galactic halo [PDF]
Astronomy & Astrophysics, 2015 Detailed spectroscopic studies of metal-poor halo stars have highlighted the important role of carbon-enhanced metal-poor (CEMP) stars in understanding the early production and ejection of carbon in the Galaxy and in identifying the progenitors of the ...
T. Hansen +9 more
semanticscholar +1 more source
DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor
The Astrophysical Journal, 2023 We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner halo of M31, which reveal the kinematics of a recent merger—a galactic immigration event—in exquisite detail.
Arjun Dey +47 more
doaj +1 more source
The Gaia-ESO Survey: A globular cluster escapee in the Galactic halo [PDF]
, 2015 A small fraction of the halo field is made up of stars that share the light element (Z
K. Lind +39 more
semanticscholar +1 more source
Galactic rotation curves versus ultralight dark matter: Implications of the soliton-host halo relation [PDF]
Physical Review D, 2018 Bosonic ultra-light dark matter (ULDM) would form cored density distributions at the center of galaxies. These cores, seen in numerical simulations, admit analytic description as the lowest energy bound state solution ("soliton") of the Schroedinger ...
Nitsan Bar +3 more
semanticscholar +1 more source
The origin of galactic metal-rich stellar halo components with highly eccentric orbits [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Using the astrometry from the ESA’s Gaia mission, previous works have shown that the Milky Way stellar halo is dominated by metal-rich stars on highly eccentric orbits.
Azadeh Fattahi +8 more
semanticscholar +1 more source
Galactic Accelerations from the GD-1 Stream Suggest a Tilted Dark Matter Halo
The Astrophysical Journal LettersCold dark matter halos are expected to be triaxial and often tilted relative to the stellar disk. Stellar streams provide a sensitive tracer of the Milky Way’s halo shape though models for the Galactic potential are typically limited to simple, symmetric
Jacob Nibauer, Ana Bonaca
doaj +1 more source
A new look at microlensing limits on dark matter in the Galactic halo [PDF]
, 2015 The motivation for this paper is to review the limits set on the MACHO content of the Galactic halo by microlensing experiments in the direction of the Large Magellanic Cloud.
M. Hawkins
semanticscholar +1 more source