Results 41 to 50 of about 324,804 (215)
The Unusual Milky Way-Local Sheet System: Implications for Spin Strength and Alignment [PDF]
, 2022 The Milky Way and the Local Sheet form a peculiar galaxy system in terms of the unusually low velocity dispersion in our neighbourhood and the seemingly high mass of the Milky Way for such an environment. Using the TNG300 simulation we searched for Milky Way analogues (MWA) located in cosmological walls with velocity dispersion in their local Hubble ...
arxiv +1 more source
STEALTH GALAXIES IN THE HALO OF THE MILKY WAY [PDF]
The Astrophysical Journal, 2010 We predict that there is a population of low-luminosity dwarf galaxies orbiting within the halo of the Milky Way that have surface brightnesses low enough to have escaped detection in star-count surveys. The overall count of stealth galaxies is sensitive to the presence (or lack) of a low-mass threshold in galaxy formation.
Erik Tollerud +4 more
openaire +4 more sources
Detection of the Keplerian decline in the Milky Way rotation curve [PDF]
Astronomy & Astrophysics, 2023 Our position inside the Galactic disc had prevented us from establishing an accurate rotation curve, until the advent of Gaia, whose third data release (Gaia DR3) made it possible to specify it up to twice the optical radius.
Y. Jiao +6 more
semanticscholar +1 more source
Gas dynamics and large-scale morphology of the Milky Way galaxy [PDF]
, 1998 We present a new model for the gas dynamics in the galactic disc inside the orbit of the Sun. Quasi-equilibrium flow solutions are determined in the gravitational potential of the deprojected COBE near-infrared bar and disc, complemented by a central ...
P. Englmaier +6 more
semanticscholar +1 more source
Leo V: A Companion of a Companion of the Milky Way Galaxy? [PDF]
, 2008 We report the discovery of a new Milky Way satellite in the constellation Leo, identified in data from the Sloan Digital Sky Survey. It lies at a distance of ~180 kpc, and is separated by ≲3° from another recent discovery, Leo IV.
V. Belokurov +9 more
semanticscholar +1 more source
Infrared stellar populations in the central parts of the Milky Way galaxy [PDF]
, 2002 Near- and mid-IR survey data from DENIS and ISOGAL are used to investigate the structure and formation history of the inner 10 ◦ (1.4 kpc) of the Milky Way galaxy. Synthetic bolometric corrections and extinction coefficients in the near- and mid-infrared
J. V. Loon +9 more
semanticscholar +1 more source
Are ultra-diffuse galaxies Milky Way-sized? [PDF]
Astronomy & Astrophysics, 2020 Now almost 70 years since its introduction, the effective or half-light radius has become a very popular choice for characterising galaxy size. However, the effective radius measures the concentration of light within galaxies and thus does not capture our intuitive definition of size which is related to the edge or boundary of objects. For this reason,
Ignacio Trujillo +5 more
openaire +3 more sources
Overview of the DESI Milky Way Survey
The Astrophysical Journal, 2023 We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory.
Andrew P. Cooper +64 more
doaj +1 more source
An [$α$/Fe]-enhanced thick disk in a Milky Way Analogue [PDF]
, 2021 The Milky Way disk consists of two prominent components - a thick, alpha-rich, low-metallicity component and a thin, metal-rich, low-alpha component. External galaxies have been shown to contain thin and thick disk components, but whether distinct components in the [$\alpha$/Fe]-[Z/H] plane exist in other Milky Way-like galaxies is not yet known.
arxiv +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