Results 51 to 60 of about 106,694 (288)
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
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
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
Globular Cluster and Galaxy Formation: M31, the Milky Way and Implications for Globular Cluster Systems of Spiral Galaxies [PDF]
, 2004 The globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise 2 distinct entities, differing in 3 respects. 1. M31 has young GCs, ages from ~100 Myr to 5 Gyr old, as well as old globular clusters.
Bajaja E. +19 more
core +4 more sources
A confirmed location in the Galactic halo for the high-velocity cloud 'chain A' [PDF]
, 1999 The high-velocity clouds of atomic hydrogen, discovered about 35 years ago, have velocities inconsistent with simple Galactic rotation models that generally fit the stars and gas in the Milky Way disk.
Kalberla, Peter M. W. +4 more
core +4 more sources
On the Interpretation of the l–v Features in the Milky Way Galaxy [PDF]
, 2010 We model the gas dynamics of barred galaxies using a three-dimensional, high-resolution, $N$-body+hydrodynamical simulation and apply it to the Milky Way in an attempt to reproduce both the large-scale structure and the clumpy morphology observed in ...
J. Baba, T. Saitoh, K. Wada
semanticscholar +1 more source
VINTERGATAN – I. The origins of chemically, kinematically, and structurally distinct discs in a simulated Milky Way-mass galaxy [PDF]
Monthly notices of the Royal Astronomical Society, 2020 Spectroscopic surveys of the Milky Way’s stars have revealed spatial, chemical, and kinematical structures that encode its history. In this work, we study their origins using a cosmological zoom simulation, VINTERGATAN, of a Milky Way-mass disc galaxy.
O. Agertz +8 more
semanticscholar +1 more source
Stellar multiplicity in the Milky Way Galaxy [PDF]
Proceedings of the International Astronomical Union, 2017 AbstractWe present our models of the effect of binaries on high-resolution spectroscopic surveys. We want to determine how many binary stars will be observed, whether unresolved binaries will contaminate measurements of chemical abundances, and how we can use spectroscopic surveys to better constrain the population of binary stars in the Galaxy.
Ross P. Church +3 more
openaire +4 more sources
Grand challenges in Milky Way and galaxies [PDF]
Frontiers in Astronomy and Space Sciences, 2015 Extragalactic astronomy is a relatively young science. Its birth may be set at the time of the “greatdebate”betweenHarlowShapleyandHeberCurtisontheextragalacticnatureofthenebulae(whichculminated with a meeting of the two protagonists in April 1920) or, with a more conservativestance,afewyearslateratthetimeofEdwinHubble ...
openaire +3 more sources