Results 111 to 120 of about 34,781 (306)

Late-time dark matter oscillations and the core-cusp problem

Journal of High Energy Physics, 2021
The core-cusp problem persists as an unresolved tension between the pre- dictions of ΛCDM cosmology and observations of dark matter (DM) profiles in dwarf spheroidal and other galaxies.
James M. Cline, Guillermo Gambini, Samuel D. McDermott, Matteo Puel   +3 more
doaj   +1 more source

Implications and Applications of Kinematic Galaxy Scaling Relations

International Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012
Galaxy scaling relations, which describe a connection between ostensibly unrelated physical characteristics, testify to an underlying order in galaxy formation that requires understanding. I review the development of a scaling relation that (1) unites the well‐known fundamental plane (FP) relation of giant elliptical galaxies and Tully‐Fisher (TF ...
Dennis Zaritsky, J. A. L. Aguerri, P. Salucci   +2 more
wiley   +1 more source

Sommerfeld-enhanced J -factors for dwarf spheroidal galaxies [PDF]

, 2017
For models in which dark matter annihilation is Sommerfeld-enhanced, the annihilation cross section increases at low relative velocities. Dwarf spheroidal galaxies (dSphs) have low characteristic dark matter particle velocities and are thus ideal ...
K. Boddy, J. Kumar, L. Strigari, Mei-Yu Wang   +3 more
semanticscholar   +1 more source

Luminosity-Diameter Relations for Globular Clusters and Dwarf Spheroidal Galaxies

, 2008
It is shown that globular clusters and the dwarf spheroidal companions of the Galaxy have a different distribution of flattening values, and appear to occupy adjacent regions of the M_v versus log R_h plane that can be separated by what will be referred ...
Belokurov, Kauffmann, Klypin, Mackey, Mackey, Martin, McLaughlin, Moore, Shapley, Shapley, Shapley, Shapley, Shapley, Sidney van den Bergh, Stonkuté, van den Bergh, van den Bergh   +16 more
core   +1 more source

The usage of Stromgren photometry in studies of Local Group Dwarf Spheroidal Galaxies - Application to Draco: a new catalogue of Draco members and a study of the metallicity distribution function and radial gradients [PDF]

, 2006
In this paper we demonstrate how Stromgren uvby photometry can be efficiently used to: 1. Identify red giant branch stars that are members in a dwarf spheroidal galaxy. 2.
A. Ardeberg, Anthony-Twarog, Aparicio, Armandroff, Ashman, Baade, Bell, Bell, Bellazzini, Bergbusch, Bonanos, Bond, Cardelli, Carney, Carretta, Cioni, Clem, Crawford, Crawford, D. Faria, Dolphin, Fulbright, G. Gilmore, G. M. Wahlgren, Grebel, Grillmair, Grundahl, Gustafsson, Harbeck, Hartwick, Heiter, Hilker, Hodge, I. Lundström, Irwin, Irwin, Kleyna, Koch, Lehnert, Muñoz, Odenkirchen, Olsen, Olsen, Olsen, Olsen, Olszewski, P. Linde, S. Feltzing, Schlegel, Schuster, Schuster, Shapley, Shetrone, Shetrone, Smith, Stetson, Stetson, Stetson, Wilkinson, Zinn, Zinn, Zinn, Zinn   +62 more
core   +2 more sources

The ISLAnds Project. III. Variable Stars in Six Andromeda Dwarf Spheroidal Galaxies [PDF]

, 2017
We present a census of variable stars in six M31 dwarf spheroidal satellites observed with the Hubble Space Telescope. We detect 870 RR Lyrae (RRL) stars in the fields of And I (296), II (251), III (111), XV (117), XVI (8), and XXVIII (87).
C. Martínez-Vázquez, M. Monelli, E. Bernard, C. Gallart, P. Stetson, E. Skillman, G. Bono, S. Cassisi, G. Fiorentino, K. McQuinn, A. Cole, A. McConnachie, N. Martin, A. Dolphin, M. Boylan-Kolchin, A. Aparicio, S. Hidalgo, D. Weisz   +17 more
semanticscholar   +1 more source

Zinc abundances in the Sculptor dwarf spheroidal galaxy^, [PDF]

Astronomy & Astrophysics, 2017
From ESO VLT/FLAMES/GIRAFFE spectra, abundance measurements of Zn have been made in ≈100 individual red giant branch (RGB) stars in the Sculptor dwarf spheroidal galaxy. This is the largest sample of individual Zn abundance measurements within a stellar system beyond the Milky Way.
Skuladottir, A., Tolstoy, E., SALVADORI, STEFANIA, Hill, V., Pettini, M.   +4 more
openaire   +3 more sources

The Magellanic Group and the Seven Dwarfs [PDF]

, 2008
The Magellanic Clouds were the largest members of a group of dwarf galaxies that entered the Milky Way (MW) halo at late times. This group, dominated by the LMC, contained ~4% of the mass of the Milky Way prior to its accretion and tidal disruption, but ~
Elena D'Onghia, George Lake, Kroupa, Kunkel, Lynden-Bell   +4 more
core   +2 more sources

The Tucana dwarf spheroidal: a distant backsplash galaxy of M31? [PDF]

, 2023
Isabel Santos-Santos, Julio F. Navarro, Alan W. McConnachie   +2 more
openalex   +1 more source

ON THE r-PROCESS ENRICHMENT OF DWARF SPHEROIDAL GALAXIES [PDF]

, 2016
Recent observations of Reticulum II have uncovered an overabundance of r-process elements compared to similar ultra-faint dwarf spheroidal galaxies (UFDs).
J. Bramante, T. Linden
semanticscholar   +1 more source