Physical Properties of Molecular Clouds at 2 pc Resolution in the Low-metallicity Dwarf Galaxy NGC 6822 and the Milky Way [PDF]
The Astrophysical Journal, 2017 Abstract We present the Atacama Large Millimeter/submillimeter Array survey of CO(2–1) emission from the 1/5 solar metallicity, Local Group dwarf galaxy NGC 6822. We achieve high ( pc) spatial resolution while covering a large area: four 250 pc × 250 pc regions that ...
Andreas Schruba +8 more
openaire +6 more sources
The role of galactic dynamics in shaping the physical properties of giant molecular clouds in Milky Way-like galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We examine the role of the large-scale galactic-dynamical environment in setting the properties of giant molecular clouds in Milky Way-like galaxies. We perform three high-resolution simulations of Milky Way-like discs with the moving-mesh hydrodynamics code arepo, yielding a statistical sample of ${\sim}80\, 000$ giant ...
Sarah M R Jeffreson +4 more
openaire +2 more sources
The Rapid Onset of Stellar Bars in the Baryon-dominated Centers of Disk Galaxies
The Astrophysical Journal, 2023 Recent observations of high-redshift galactic disks ( z ≈ 1–3) show a strong negative trend in the dark-matter (DM) fraction f _DM with increasing baryon surface density.
Joss Bland-Hawthorn +3 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically designed multiband photometric survey aiming to provide reliable stellar parameters with accuracy comparable to those from low-resolution optical spectra ...
Zhou Fan +37 more
doaj +1 more source
The Stellar Halo of the Galaxy is Tilted and Doubly Broken
The Astronomical Journal, 2022 Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our galaxy (Gaia–Sausage–Enceladus, GSE). Using chemical abundances and kinematics from the H3 Survey, we identify 5559 halo stars from this merger in the radial ...
Jiwon Jesse Han +9 more
doaj +1 more source
A Study of the Properties and Dynamics of the Disk of Satellites in a Milky-Way-like Galaxy System
Galaxies, 2023 The dynamics of the satellite systems of Milky-Way-like galaxies offer a useful means by which to study the galaxy formation process in the cosmological context. It has been suggested that the currently observed anisotropic distribution of the satellites
Xinghai Zhao +3 more
doaj +1 more source
Detection of Multiple Phase Space Overdensities of GSE Stars by Orbit Integration
The Astrophysical Journal, 2023 In N -body simulations, nearly radial mergers can form shell-like overdensities in the sky position and phase space ( r − v _r ) due to the combination of dynamical friction and tidal stripping.
Wenbo Wu +7 more
doaj +1 more source
The connection between the host halo and the satellite galaxies of the Milky Way [PDF]
, 2016 Many properties of the Milky Way's dark matter halo, including its mass assembly history, concentration, and subhalo population, remain poorly constrained.
Benson, Andrew +7 more
core +3 more sources
Investigating halo substructures with annual modulation signature [PDF]
, 2006 Galaxy hierarchical formation theories, numerical simulations, the discovery of the Sagittarius Dwarf Elliptical Galaxy (SagDEG) in 1994 and more recent investigations suggest that the dark halo of the Milky Way can have a rich phenomenology containing ...
Belli, P. +15 more
core +2 more sources
The Observed and Predicted Spatial Distribution of Milky Way Satellite Galaxies [PDF]
, 2004 We review evidence that the census of Milky Way satellites similar to those known may be incomplete at low latitude due to obscuration and in the outer halo due to a decreasing sensitivity to dwarf satellites with distance.
Armandroff +67 more
core +2 more sources