Results 11 to 20 of about 2,700 (75)
The Mitchell Spectrograph: Studying Nearby Galaxies with the VIRUS Prototype
Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013 The Mitchell Spectrograph (a.k.a. VIRUS‐P) on the 2.7 m Harlan J. Smith telescope at McDonald Observatory is currently the largest field of view (FOV) integral field unit (IFU) spectrograph in the world (1.7′ × 1.7′). It was designed as a prototype for the highly replicable VIRUS spectrograph which consists of a mosaic of IFUs spread over a 16 ...
Guillermo A. Blanc +1 more
wiley +1 more source
A Scalar Field Dark Matter Model and Its Role in the Large‐Scale Structure Formation in the Universe
Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012 We present a model of dark matter based on scalar‐tensor theory of gravity. With this scalar field dark matter model we study the non‐linear evolution of the large‐scale structures in the universe. The equations that govern the evolution of the scale factor of the universe are derived together with the appropriate Newtonian equations to follow the ...
Mario A. Rodríguez-Meza, Dario Nuñez
wiley +1 more source
Applying Schwarzschild's orbit superposition method to barred or non-barred disc galaxies [PDF]
, 2015 We present an implementation of the Schwarzschild orbit superposition method which can be used for constructing self-consistent equilibrium models of barred or non-barred disc galaxies, or of elliptical galaxies with figure rotation.
Athanassoula, E., Vasiliev, Eugene
core +7 more sources
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 We review numerical works carried out over the last decade on the role of environmental mechanisms in shaping nature of the faintest galaxies known, dwarf spheroidals (dSphs). The combination of tidally induced morphological transformation, termed tidal stirring, with mass loss due to tidal and ram‐pressure stripping aided by heating due to the cosmic ...
Lucio Mayer, Andrey V. Kravtsov
wiley +1 more source
Dark Matter Substructure and Dwarf Galactic Satellites
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 A decade ago cosmological simulations of increasingly higher resolution were used to demonstrate that virialized regions of Cold Dark Matter (CDM) halos are filled with a multitude of dense, gravitationally bound clumps. These dark matter subhalos are central regions of halos that survived strong gravitational tidal forces and dynamical friction during
Andrey Kravtsov, Ulrich Hopp
wiley +1 more source
Kinematics of Milky Way Satellites: Mass Estimates, Rotation Limits, and Proper Motions
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 In the past several years kinematic data sets from Milky Way satellite galaxies have greatly improved, furthering the evidence that these systems are the most dark matter dominated objects known. This paper discusses a maximum likelihood formalism that extracts important quantities from these kinematic data sets, including the amplitude of a rotational
Louis E. Strigari, Andrey V. Kravtsov
wiley +1 more source
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 This paper gives an overview of the attempts to determine the distribution of dark matter in low surface brightness disk and gas‐rich dwarf galaxies, both through observations and computer simulations. Observations seem to indicate an approximately constant dark matter density in the inner parts of galaxies, while cosmological computer simulations ...
W. J. G. de Blok, Elias Brinks
wiley +1 more source
Deadly dark matter cusps vs faint and extended star clusters: Eridanus II and Andromeda XXV
, 2017 The recent detection of two faint and extended star clusters in the central regions of two Local Group dwarf galaxies, Eridanus II and Andromeda XXV, raises the question of whether clusters with such low densities can survive the tidal field of cold dark
Amorisco, Nicola C.
core +1 more source
, 2018 Through a suite of direct N-body simulations, we explore how the structural and kinematic evolution of a star cluster located at the center of a dwarf galaxy is affected by the shape of its host's dark matter density profile.
Vesperini, Enrico, Webb, Jeremy J.
core +1 more source
The Cusp/Core problem: supernovae feedback versus the baryonic clumps and dynamical friction model
, 2016 In the present paper, we compare the predictions of two well known mechanisms considered able to solve the cusp/core problem (a. supernova feedback; b. baryonic clumps-DM interaction) by comparing their theoretical predictions to recent observations of ...
Del Popolo, A., Pace, F.
core +1 more source