Results 81 to 90 of about 35,030 (307)
Homogeneous Photometry VI: Variable Stars in the Leo I Dwarf Spheroidal Galaxy
, 2014 We have characterized the pulsation properties of 164 candidate RR Lyrae variables (RRLs) and 55 candidate Anomalous and/or short-period Cepheids in Leo I dwarf spheroidal galaxy.
Bernard, Edouard J. +7 more
core +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 +3 more
semanticscholar +1 more source
The impact of cored density profiles on the observable quantities of dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2018 We modify the chemo-dynamical code gear to simulate the impact of self-interacting dark matter (SIDM) on the observable quantities of 19 low-mass dwarf galaxies with a variety star-forming properties.
D. Harvey +3 more
semanticscholar +1 more source
Massive black holes in dwarf spheroidal galaxy haloes? [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 15 pages, 13 figures; accepted for publication in MNRAS.
Jin, Shoko +2 more
openaire +2 more sources
Astronomical Signatures of Dark Matter
Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014 Several independent astronomical observations in different wavelength bands reveal the existence of much larger quantities of matter than what we would deduce from assuming a solar mass to light ratio. They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of ...
Paul Gorenstein +2 more
wiley +1 more source
Phase-space mass bound for fermionic dark matter from dwarf spheroidal galaxies [PDF]
, 2017 We reconsider the lower bound on the mass of a fermionic dark matter (DM) candidate resulting from the existence of known small Dwarf Spheroidal galaxies, in the hypothesis that their DM halo is constituted by degenerate fermions, with phase-space ...
Chiara Di Paolo, F. Nesti, F. Villante
semanticscholar +1 more source
No WIMP mini-spikes in dwarf spheroidal galaxies [PDF]
Journal of Cosmology and Astroparticle Physics, 2015 The formation of black holes inevitably affects the distribution of dark and baryonic matter in their vicinity, leading to an enhancement of the dark matter density, called spike, and if dark matter is made of WIMPs, to a strong enhancement of the dark matter annihilation rate.
Wanders, Mark +3 more
openaire +3 more sources
Intermediate Mass Black Holes: Their Motion and Associated Energetics
Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014 There is a lot of current astrophysical evidence and interest in intermediate mass black holes (IMBH), ranging from a few hundred to several thousand solar masses. The active galaxy M82 and the globular cluster G1 in M31, for example, are known to host such objects.
C. Sivaram, Kenath Arun, Christian Corda
wiley +1 more source
Assessment of Dark Matter Models Using Dark Matter Correlations across Dwarf Spheroidal Galaxies
Universe, 2022 The predicted size of dark matter substructures in kilo-parsec scales is model-dependent. Therefore, if the correlations between dark matter mass densities as a function of the distances between them are measured via observations, we can scrutinize dark ...
Ahmad Borzou
doaj +1 more source
Star-Forming Regions in Dwarf Galaxies of the Local Volume [PDF]
, 2013 We present the H-alpha flux measurements for 44 nearby dwarf galaxies, derived from the observations at the 6-m BTA telescope. H-alpha fluxes were used to determine the rate of integral star formation of galaxies, SFR. For the observed galaxies the value
Kaisin, S. S., Karachentsev, I. D
core +1 more source