Results 191 to 200 of about 34,432 (305)

The dynamical and chemical evolution of dwarf spheroidal galaxies with GEAR [PDF]

, 2012
Yves Revaz, P. Jablonka
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The Globular Clusters of Dwarf Spheroidal Galaxies

The Astrophysical Journal, 1998
The possibility that the Sagittarius dwarf spheroidal might have formed as a Searle-Zinn fragment in the outer halo of the Galaxy is discussed. Arguments in favor of this hypothesis are: (1) The luminosity distribution of globular clusters in both Sagittarius and in the outer halo (Rgc > 80 kpc), appear to be bimodal with peaks near MV ~ -5 and MV ~
openaire   +2 more sources

Dynamical Friction by Coupled Dark Energy

The Astrophysical Journal
In this paper, we examine dynamical friction at galactic scales within the framework of coupled dark energy (CDE). This model posits dark energy as coupled quintessence, which maintains a minimal coupling to gravity but interacts nonminimally with both ...
Nasrin Nari, Mahmood Roshan
doaj   +1 more source

The Structure and Formation Histories of Low-mass Quiescent Galaxies in the A2744 Cluster Environment

The Astrophysical Journal
Low-mass quiescent galaxies are thought to predominantly reside in overdense regions, as environmental effects are often invoked to explain their shutdown of star formation. These longer-timescale quenching mechanisms—such as interactions with hot gas in
Sam E. Cutler, John R. Weaver, Katherine E. Whitaker, Jenny E. Greene, David J. Setton, Zach J. Webb, Ayesha Abdullah, Aubrey Medrano, Rachel Bezanson, Gabriel Brammer, Robert Feldmann, Lukas J. Furtak, Karl Glazebrook, Ivo Labbe, Joel Leja, Danilo Marchesini, Tim B. Miller, Ikki Mitsuhashi, Themiya Nanayakkara, Erica J. Nelson, Richard Pan, Sedona H. Price, Katherine A. Suess, Bingjie Wang   +23 more
doaj   +1 more source

Physical properties of RR Lyrae variables in Galactic globular clusters and dwarf spheroidal galaxies

, 2019
Saruta Benkortem, Nahathai Tanakul, Chutipong Suwannajak, P. Pattarakijwanich, Suraphong Yuma   +4 more
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VLT/UVES Abundances in Four Nearby Dwarf Spheroidal Galaxies. II. Implications for Understanding Galaxy Evolution [PDF]

, 2003
Eline Tolstoy, Kim A. Venn, Matthew Shetrone, Francesca Primas, Vanessa Hill, Andreas Kaufer, Thomas Szeifert, Eline Tolstoy, Kim A. Venn, Matthew Shetrone, Francesca Primas, Vanessa Hill, Andreas Kaufer, Thomas Szeifert   +13 more
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SPECTROSCOPIC CONFIRMATION OF THE DWARF SPHEROIDAL GALAXY d0994+71 AS A MEMBER OF THE M81 GROUP OF GALAXIES [PDF]

, 2016
Elisa Toloba, David Sand, Puragra Guhathakurta, Kristin Chiboucas, Denija Crnojevic, Joshua D. Simon, Elisa Toloba, David Sand, Puragra Guhathakurta, Kristin Chiboucas, Denija Crnojevic, Joshua D. Simon   +11 more
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HSTPROMO Internal Proper-motion Kinematics of Dwarf Spheroidal Galaxies. I. Velocity Anisotropy and Dark Matter Cusp Slope of Draco

The Astrophysical Journal
We analyze four epochs of Hubble Space Telescope imaging over 18 yr for the Draco dwarf spheroidal galaxy. We measure precise proper motions for hundreds of stars and combine these with existing line-of-sight (LOS) velocities.
Eduardo Vitral, Roeland P. van der Marel, Sangmo Tony Sohn, Mattia Libralato, Andrés del Pino, Laura L. Watkins, Andrea Bellini, Matthew G. Walker, Gurtina Besla, Marcel S. Pawlowski, Gary A. Mamon   +10 more
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Ruling out dark matter interpretation of the galactic GeV excess by gamma-ray data of galaxy clusters. [PDF]

Sci Rep, 2017
Chan MH, Leung CH.
europepmc   +1 more source

On Kinematic Substructure in the Sextans Dwarf Spheroidal Galaxy [PDF]

, 2006
Matthew G. Walker, Mario Mateo, Edward W. Olszewski, Jayanta Kumar Pal, Bodhisattva Sen, Michael Woodroofe   +5 more
openalex   +1 more source