Results 41 to 50 of about 104,909 (264)
The masses of the Milky Way and Andromeda galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We present a family of robust tracer mass estimators to compute the enclosed mass of galaxy haloes from samples of discrete positional and kinematical data of tracers, such as halo stars, globular clusters and dwarf satellites. The data may be projected positions, distances, line of sight velocities or proper motions.
Laura L. Watkins +3 more
openaire +4 more sources
Fundamental Parameters of the Milky Way Galaxy Based on VLBI Astrometry [PDF]
, 2012 We present analyses to determine the fundamental parameters of the Galaxy based on VLBI astrometry of 52 Galactic maser sources obtained with VERA, VLBA, and EVN.
M. Honma +33 more
semanticscholar +1 more source
Modeling of Spiral Structure in a Multi-Component Milky~Way-Like Galaxy [PDF]
Galaxies, 2021 Using recent observational data, we construct a set of multi-component equilibrium models of the disk of a Milky Way-like galaxy. The disk dynamics are studied using collisionless-gaseous numerical simulations, based on the joined integration of the ...
S. Khrapov, A. Khoperskov, V. Korchagin
semanticscholar +1 more source
CATALOG OF OBSERVED TANGENTS TO THE SPIRAL ARMS IN THE MILKY WAY GALAXY [PDF]
, 2014 From the Sun's location in the Galactic disk, one can use different arm tracers (CO, H i, thermal or ionized or relativistic electrons, masers, cold and hot dust, etc.) to locate a tangent to each spiral arm in the disk of the Milky Way.
J. Vallée
semanticscholar +1 more source
Stellar Bars in Isolated Gas-rich Spiral Galaxies Do Not Slow Down
The Astrophysical Journal, 2023 Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expected ...
Angus Beane +8 more
doaj +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
The Astrophysical Journal, 2023 We continue our series of papers on phase-space distributions of stars in the Milky Way based on photometrically derived metallicities and Gaia astrometry, with a focus on the halo−disk interface in the local volume.
Deokkeun An +3 more
doaj +1 more source
Galactic Halo substructure in the Sloan Digital Sky Survey: the ancient tidal stream from the Sagittarius dwarf galaxy [PDF]
, 2000 Two studies have recently reported the discovery of pronounced Halo substructure in the Sloan Digital Sky Survey (SDSS) commissioning data. Here we show that this Halo substructure is almost in its entirety due to the expected tidal stream torn off the ...
Ibata, Rodrigo +3 more
core +4 more sources
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
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