Disentangling γ − β: The Fourth-order Velocity Moments Based on Spherical Jeans Analysis
The Astrophysical JournalDistinguishing a core and a cusp within dark matter halos is complexified by the existence of mass-anisotropy degeneracy, where various combinations of velocity anisotropy ( β ) and inner density slope ( γ ) yield similar observational signatures.
Dafa Wardana +2 more
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Tracing satellite planes in the Sculptor group
Astronomy & AstrophysicsContext. Although substantial progress has been made in reconciling lambda cold dark matter (ΛCDM) simulations with the observed abundance and distribution of satellite galaxies, important tensions persist.
Martínez-Delgado David +7 more
doaj +1 more source
Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]
Astron Astrophys Rev, 2023 Ruszkowski M, Pfrommer C.
europepmc +1 more source
VLT/UVES Abundances in Four Nearby Dwarf Spheroidal Galaxies. II. Implications for Understanding Galaxy Evolution [PDF]
, 2003 Eline Tolstoy +6 more
openalex +1 more source
Subaru Telescope -History, active/adaptive optics, instruments, and scientific achievements. [PDF]
Proc Jpn Acad Ser B Phys Biol Sci, 2021 Iye M.
europepmc +1 more source
The Dark Matter Content of Milky Way Dwarf Spheroidal Galaxies: Draco, Sextans, and Ursa Minor
The Astrophysical JournalThe Milky Way Survey of the Dark Energy Spectroscopic Instrument (DESI) has so far observed three classical dwarf spheroidal galaxies (dSphs): Draco, Sextans, and Ursa Minor.
Hao Yang +52 more
doaj +1 more source
A FIRST MEASUREMENT OF THE PROPER MOTION OF THE LEO II DWARF SPHEROIDAL GALAXY [PDF]
, 2011 Sébastien Lépine +3 more
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The Kinematics of Dwarf Spheroidal Galaxies
, 1997 I review observational data on the kinematic properties of dwarf spheroidal galaxies in the halo of the Milky Way and beyond. The present data confirm previous claims that these galaxies have unusually large central velocity dispersions. `Simple' sources of bias such as binary stars, internal atmospheric motions, measurement errors, and small sample ...
openaire +2 more sources
Are Local Group Dwarf Spheroidal Galaxies the First Safe Planet-hosting Environments?
The Astrophysical JournalWe explore whether Local Group dwarf spheroidal (dSph) galaxies might have hosted Earth-like planets dwelling unexposed for several billions of years to major galactic threats to life, such as supernovae and gamma-ray bursts.
Stefano Ciabattini +2 more
doaj +1 more source
Little Bear’s pulsating stars: Variable star census of UMi dSph Galaxy
EPJ Web of Conferences, 2017 Recent observations and a photometric search for variable stars in the Ursa Minor dwarf spheroidal galaxy (UMi dSph) are presented. Our observations were taken at Apache Point Observatory in 2014 and 2016 using the 0.5m ARCSAT telescope and the West ...
Kinemuchi K. +4 more
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