Results 61 to 70 of about 104,909 (264)

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, F. Renaud, S. Feltzing, J. Read, N. Ryde, Eric P Andersson, Martin P. Rey, T. Bensby, D. Feuillet   +8 more
semanticscholar   +1 more source

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

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, Edita Stonkute, Sofia Feltzing, Jennifer A. Johnson   +3 more
openaire   +4 more sources

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, Gang Zhao, Jiang Chang, Xiang-Xiang Xue, Yuqin Chen, Chengdong Li, Xianhao Ye, Chengqun Yang   +7 more
doaj   +1 more source

The Imprint of Clump Formation at High Redshift. II. The Chemistry of the Bulge

The Astrophysical Journal, 2023
In Paper I, we showed that clumps in high-redshift galaxies, having a high star formation rate density (Σ _SFR ), produce disks with two tracks in the [Fe/H]–[ α /Fe] chemical space, similar to that of the Milky Way’s (MW’s) thin+thick disks.
Victor P. Debattista, David J. Liddicott, Oscar A. Gonzalez, Leandro Beraldo e Silva, João A. S. Amarante, Ilin Lazar, Manuela Zoccali, Elena Valenti, Deanne B. Fisher, Tigran Khachaturyants, David L. Nidever, Thomas R. Quinn, Min Du, Susan Kassin   +13 more
doaj   +1 more source

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, B. Willman, Bellazzini, Benson, Bullock, Bullock, Cannon, Chiu, Crane, D. Reed, De Lucia, Dekel, Diemand, Dijkstra, Dinescu, Efstathiou, Eke, F. Governato, Font, Fusi Pecci, Governato, Governato, Grebel, Hayashi, Holmberg, Ibata, Ibata, Irwin, J. J. Dalcanton, Karachentsev, Katz, Kauffmann, Kazantzidis, Kleyna, Klypin, Klypin, Knebe, Kravtsov, Lee, Lynden-Bell, Majewski, Majewski, Martin, Mateo, Mayer, Moore, Newberg, Palma, Peñarrubia, Quinn, Reed, Rocha-Pinto, Rosati, Spergel, Stanek, Stoehr, Stoehr, Susa, T. Quinn, Taylor, Thoul, van den Bergh, Willman, Wilson, Yanny, Zaritsky, Zaritsky, Zehavi   +67 more
core   +2 more sources

The Galactic Bulge: A Review

, 2007
The Milky Way is the only galaxy for which we can resolve individual stars at all evolutionary phases, from the Galactic center to the outskirt. The last decade, thanks to the advent of near IR detectors and 8 meter class telescopes, has seen a great ...
Alard, Alves-Brito, Barbuy, Barbuy, Barbuy, Bica, Dante Minniti, Dwek, Hamadache, Harding, Immeli, Lecureur, Manuela Zoccali, Zoccali, Zoccali, Zoccali   +15 more
core   +1 more source

Dust formation in Milky Way-like galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We introduce a dust model for cosmological simulations implemented in the moving-mesh code AREPO and present a suite of cosmological hydrodynamical zoom-in simulations to study dust formation within galactic haloes. Our model accounts for the stellar production of dust, accretion of gas-phase metals onto existing grains, destruction of dust through ...
McKinnon, Ryan, Torrey, Paul, Vogelsberger, Mark, McKinnon, Ryan Michael, Torrey, Paul A.   +4 more
openaire   +6 more sources

The Age-dependent Vertical Actions of Young Stars in the Galaxy

The Astrophysical Journal
Stars in the Galactic disk are born on cold, nearly circular orbits with small vertical excursions. After their birth, their orbits evolve, driven by small- or large-scale perturbations in the Galactic disk’s gravitational potential.
D. N. Garzon, Neige Frankel, Eleonora Zari, Maosheng Xiang, Hans-Walter Rix   +4 more
doaj   +1 more source

Spiral structure of the Third Galactic Quadrant and the solution to the Canis Major debate [PDF]

, 2006
With the discovery of the Sagittarius dwarf spheroidal (Ibata et al. 1994), a galaxy caught in the process of merging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research.
Baume, G., Carraro, G., Giorgi, E. E, Lyra, W., Moitinho, A., Vazquez, R. A.   +5 more
core   +4 more sources