Origins of the Evil Eye: M64's Stellar Halo Reveals the Recent Accretion of an SMC-mass Satellite
The Astrophysical Journal Letters, 2023 M64, often called the “Evil Eye” galaxy, is unique among local galaxies. Beyond its dramatic, dusty nucleus, it also hosts an outer gas disk that counter-rotates relative to its stars.
Adam Smercina +11 more
doaj +1 more source
Studying stellar halos with future facilities [PDF]
, 2015 Stellar halos around galaxies retain fundamental evidence of the processes which lead to their build up. Sophisticated models of galaxy formation in a cosmological context yield quantitative predictions about various observable characteristics, including
Falomo, Renato +2 more
core +3 more sources
The Impact of Assembly Bias on the Galaxy Content of Dark Matter Halos [PDF]
, 2017 We study the dependence of the galaxy content of dark matter halos on large-scale environment and halo formation time using semi-analytic galaxy models applied to the Millennium simulation.
I. Zehavi +5 more
semanticscholar +1 more source
The Colors of Dwarf Elliptical Galaxy Globular Cluster Systems, Nuclei, and Stellar Halos [PDF]
, 2004 We present the results of a Hubble Space Telescope WFPC2 F555W and F814W survey of 69 dwarf elliptical galaxies (dEs) in the Virgo and Fornax Clusters and Leo Group.
J. Lotz, B. Miller, H. Ferguson
semanticscholar +1 more source
Tracing Galaxy Formation with Stellar Halos. II. Relating Substructure in Phase and Abundance Space to Accretion Histories [PDF]
, 2008 This paper explores the mapping between the observable properties of a stellar halo in phase and abundance space and the parent galaxy’s accretion history in terms of the characteristic epoch of accretion and mass and orbits of progenitor objects.
K. Johnston +5 more
semanticscholar +1 more source
On the formation of dwarf galaxies and stellar haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 15 pages, 7 figures, one figure added to match accepted version. Some typos fixed.
Read J. I, Pontzen A. P, Viel, Matteo
openaire +6 more sources
The extended ‘stellar halo’ of the Ursa Minor dwarf galaxy
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Stellar candidates in the Ursa Minor (UMi) dwarf galaxy have been found using a new Bayesian algorithm applied to Gaia EDR3 data. Five of these targets are located in the extreme outskirts of UMi, from ∼5 to 12 elliptical half-light radii (rh), where rh(UMi) = 17.32 ± 0.11 arcmin, and have been observed with the high-resolution ...
Federico Sestito +11 more
openaire +4 more sources
Revealing the Galaxy–Halo Connection through Machine Learning
The Astrophysical Journal, 2023 Understanding the connections between galaxy stellar mass, star formation rate, and dark matter halo mass represents a key goal of the theory of galaxy formation. Cosmological simulations that include hydrodynamics, physical treatments of star formation,
Ryan Hausen +7 more
doaj +1 more source
THE STELLAR HALOS OF MASSIVE ELLIPTICAL GALAXIES. III. KINEMATICS AT LARGE RADIUS [PDF]
, 2014 We present a two-dimensional kinematic analysis out to ∼2–5 effective radii (Re) of 33 massive elliptical galaxies with stellar velocity dispersions σ > 150 km s−1.
S. Raskutti, J. Greene, J. Murphy
semanticscholar +1 more source
The Outer Halos of Very Massive Galaxies: BCGs and their DSC in the Magneticum Simulations
Galaxies, 2017 Recent hydrodynamic cosmological simulations cover volumes up to Gpc 3 and resolve halos across a wide range of masses and environments, from massive galaxy clusters down to normal galaxies, while following a large variety of physical processes ...
Rhea-Silvia Remus +2 more
doaj +1 more source