Results 151 to 160 of about 12,545 (267)

Dynamical Friction by Coupled Dark Energy

open access: yesThe 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 globular cluster system of the Sagittarius dwarf spheroidal galaxy: the age of Terzan 8 [PDF]

open access: green, 1998
Montegriffo   +5 more
openalex   +1 more source

HSTPROMO Internal Proper-motion Kinematics of Dwarf Spheroidal Galaxies. I. Velocity Anisotropy and Dark Matter Cusp Slope of Draco

open access: yesThe 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   +10 more
doaj   +1 more source

Exploring Halo Substructure with Giant Stars. II. Mapping the Extended Structure of the Carina Dwarf Spheroidal Galaxy [PDF]

open access: bronze, 2000
Steven R. Majewski   +5 more
openalex   +1 more source

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