Results 151 to 160 of about 35,030 (307)

New limits on the dark matter lifetime from dwarf spheroidal galaxies using Fermi-LAT [PDF]

, 2015
Dwarf spheroidal galaxies (dSphs) are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density.
M. Baring, T. Ghosh, F. Queiroz, K. Sinha   +3 more
semanticscholar   +1 more source

A UNIVERSAL MASS PROFILE FOR DWARF SPHEROIDAL GALAXIES?

The Astrophysical Journal, 2009
Replacement provides corrections to values of half-light radii adopted for eight classical dSphs, including revised tables and figures (conclusions are unchanged).
Walker, Matthew G., Mateo, Mario, Olszewski, Edward W., Peñarrubia, Jorge, Evans, N. Wyn, Gilmore, Gerard   +5 more
openaire   +2 more sources

An Analytical Galactic Chemical Evolution Model with Gas Inflow and a Terminal Wind

The Astrophysical Journal
We present a new analytical galactic chemical evolution (GCE) model with gas inflow, internally caused outflow, and extra gas loss after a period of time. The latter mimics the ram pressure stripping of a dwarf satellite galaxy near the pericenter of its
Kateryna A. Kvasova, Evan N. Kirby
doaj   +1 more source

Search for annihilating Dark Matter towards dwarf galaxies with the Cherenkov Telescope Array

EPJ Web of Conferences, 2017
The standard model of cosmology indicates that approximately 27% of the energy density of the Universe is in the form of dark matter. The nature of dark matter is an open question in modern physics.
Morselli Aldo, Rodríguez Gonzalo
doaj   +1 more source

Relieving Tensions Related to the Dark Matter Interpretation of the Fermi-LAT Data

Galaxies, 2018
Recently, many studies indicate that the GeV gamma ray excess signal from the central Milky Way can be best explained by ∼40–50 GeV dark matter annihilating via the b b ¯ channel.
Man Ho Chan
doaj   +1 more source

Maximally self-interacting dark matter: models and predictions

Journal of High Energy Physics, 2020
We study self-interacting dark matter (SIDM) scenarios, where the s-wave self-scattering cross section almost saturates the Unitarity bound. Such self-scattering cross sections are singly parameterized by the dark matter mass, and are featured by strong ...
Ayuki Kamada, Hee Jung Kim, Takumi Kuwahara   +2 more
doaj   +1 more source

Chemical Properties of Star-Forming Emission Line Galaxies at z=0.1 - 0.5

, 1998
We measure oxygen and nitrogen abundances for 14 star-forming emission line galaxies (ELGs) at 0 ...
Bender R., Davies J. I., Dennis Zaritsky, Edmunds M. G., Henry A. Kobulnicky, Howarth I. D., Hummer D. G., Larson R. B., Lequeux J., Madau P., Mateo M., Pagel B. E. J., Pagel B. E. J., Pagel B. E. J., Pagel B. E. J., Renzini A., Rix H. W., Schneider D. P., Seaton M. J., Telles E., Telles E., Terlevich R., van Zee L.   +22 more
core   +3 more sources

Constraining the distribution of dark matter in dwarf spheroidal galaxies with stellar tidal streams [PDF]

, 2015
We use high-resolution N-body simulations to follow the formation and evolution of tidal streams associated to dwarf spheroidal galaxies (dSphs). The dSph models are embedded in dark matter (DM) haloes with either a centrally-divergent 'cusp', or an ...
R. Errani, J. Peñarrubia, G. Tormen
semanticscholar   +1 more source

Modeling wave dark matter in dwarf spheroidal galaxies

Journal of Physics: Conference Series, 2015
22 pages, 10 figures, 3 ...
Bray, Hubert L., Parry, Alan R.
openaire   +2 more sources

Implications of elemental abundances in dwarf spheroidal galaxies [PDF]

Astronomy & Astrophysics, 2006
Unusual elemental abundance patterns observed for stars belonging to nearby dwarf spheroidal (dSph) galaxies are discussed. Analysis of the [alpha/H] vs. [Fe/H] diagrams where alpha represents Mg or average of alpha-elements reveals that Fe from Type Ia supernovae (SNe Ia) does not contribute to the stellar abundances in the dSph galaxies where the ...
openaire   +2 more sources