Results 111 to 120 of about 35,030 (307)

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

Unbiased constraints on ultralight axion mass from dwarf spheroidal galaxies [PDF]

, 2016
It has been suggested that the internal dynamics of dwarf spheroidal galaxies (dSphs) can be used to test whether or not ultralight axions with $m_a\sim 10^{-22}\text{eV}$ are a preferred dark matter candidate.
A. González-Morales, A. González-Morales, D. Marsh, J. Peñarrubia, L. Ureña‐López   +4 more
semanticscholar   +1 more source

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

On Dwarf Galaxies as the Source of Intracluster Gas [PDF]

, 1996
Recent observational evidence for steep dwarf galaxy luminosity functions in several rich clusters has led to speculation that their precursors may be the source of the majority of gas and metals inferred from intracluster medium (ICM) x-ray observations.
Arimoto N., Arnaud M., B. K. Gibson, Babul A., Bower R. G., Driver S. P., Elbaz D., F. Matteucci, Gibson B. K., Gibson B. K., Gibson B. K., Gibson B. K., Greggio L., Larson R. B., Matteucci F., Matteucci F., Matteucci F., Matteucci F., Melnick J., Mihara K., Mitchell R. J., Okazaki Y., Pastor J., Renzini A., Sarazin C. L., Schaller G., Sil'chenko O. K., Terlevich R., Yoshii Y.   +28 more
core   +3 more sources

Jeans Analysis for Dwarf Spheroidal Galaxies in Wave Dark Matter [PDF]

, 2016
Although still under debate, observations generally suggest that dwarf spheroidal (dSph) galaxies exhibit large constant-density cores in the centers, which can hardly be explained by dissipationless cold dark matter simulations without baryonic feedback.
Shu-Rong Chen, Hsi-Yu Schive, T. Chiueh
semanticscholar   +1 more source

The dwarf spheroidal galaxy Andromeda I

The Astrophysical Journal, 1990
Images of Andromeda I in the visual and near-infrared show a giant branch characteristic of galactic globular clusters of intermediate metallicity. The distance of the galaxy is estimated from the tip of the giant branch to be 790 + or - 60 kpc. The physical dimensions and luminosity are similar to those of the dwarf spheroidal in Sculptor. There is no
Jeremy Mould, Jerome Kristian
openaire   +1 more source

The Dynamical and Chemical Evolution of Dwarf Spheroidal Galaxies [PDF]

, 2009
We present a large sample of fully self-consistent hydrodynamical Nbody/Tree-SPH simulations of isolated dwarf spheroidal galaxies (dSphs). It has enabled us to identify the key physical parameters and mechanisms at the origin of the observed variety in ...
A. Helmi, Alimi, B. Letarte, Babusiaux, Barkana, Barnes, Battaglia, Battaglia, Battaglia, Blais-Ouellette, Bosler, Bullock, Carraro, Coleman, de Blok, de Blok, de Blok, Dekel, Dolphin, E. Tolstoy, Efstathiou, Ferrara, Fukushige, G. Battaglia, Gallagher, Galli, Geisler, Gentile, Gentile, Gilmore, Gingold, Harbeck, Helmi, Hensler, Hernquist, Hernquist, Hurley-Keller, Ikuta, Irwin, K. A. Venn, Katz, Katz, Kawata, Kirby, Kleyna, Kobayashi, Koch, Koch, Kodama, Kroupa, Lanfranchi, Lee, Leitherer, Lucy, M. D. Shetrone, M. Irwin, Mac Low, Maio, Maraston, Maraston, Marcolini, Marcolini, Martin, Mateo, Mayer, Mighell, Monaghan, Moore, Mori, Mori, Murakami, Muñoz, Navarro, P. Jablonka, Peñarrubia, Poirier, Poirier, Read, Ricotti, Salpeter, Salvadori, Schmidt, Serna, Shetrone, Shetrone, Shetrone, Shetrone, Spano, Spekkens, Springel, Stinson, Stinson, Strigari, Sutherland, Swaters, T. Sawala, Tinsley, Tolstoy, Tolstoy, Tsujimoto, V. Hill, Valcke, Walker, Walker, Walker, Wise, Y. Revaz   +106 more
core   +5 more sources

Revealing the Structure and Internal Rotation of the Sagittarius Dwarf Spheroidal Galaxy with Gaia and Machine Learning [PDF]

, 2021
Andrés del Pino, Mark A. Fardal, Roeland P. van der Marel, Ewa L. Łokas, Cecilia Mateu, Sangmo Tony Sohn   +5 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

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