Results 61 to 70 of about 30,566 (153)

Further Evidence for a Merger Origin for the Thick Disk: Galactic Stars Along Lines-of-sight to Dwarf Spheroidal Galaxies

, 2005
The history of the Milky Way Galaxy is written in the properties of its stellar populations. Here we analyse stars observed as part of surveys of local dwarf spheroidal galaxies, but which from their kinematics are highly probable to be non-members.
A. Koch, E. K. Grebel, Gerard Gilmore, Gilmore G., Jan T. Kleyna, John E. Norris, M. I. Wilkinson, N. W. Evans, Rosemary F. G. Wyse, Unavane M.   +9 more
core   +2 more sources

Stellar haloes in Milky-Way mass galaxies: From the inner to the outer haloes

, 2014
We present a comprehensive study of the chemical properties of the stellar haloes of Milky-Way mass galaxies, analysing the transition between the inner to the outer haloes.
Beers, T., Carollo, D., Scannapieco, C., Tissera, P.   +3 more
core   +1 more source

A Novel Approach to Identifying Substructures through Analysis of Metallicity Distribution Functions

The Astrophysical Journal
We present a new method for identifying Galactic halo substructures accreted from dwarf galaxies by combining metallicity distribution functions (MDFs) with orbital parameters.
Young Kwang Kim, Young Sun Lee, Timothy C. Beers   +2 more
doaj   +1 more source

Evolution of the Milky Way halo by accretion of dwarf satellite galaxies

, 2011
Within the Cold Dark Matter scenario the hierarchical merging paradigm is the natural result to form massive galactic halos by the minor mergers of sub-halos and, by this, inherently their stellar halo.
Bouchard, Diemand, G. Hensler, Grebel, Johnston, M. Petrov, Mayer, Prantzos, Revaz, Tolstoy   +9 more
core   +1 more source

Predictions for the Detectability of Milky Way Satellite Galaxies and Outer-Halo Star Clusters with the Vera C. Rubin Observatory

The Open Journal of Astrophysics
We predict the sensitivity of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) to faint, resolved Milky Way satellite galaxies and outer-halo star clusters.
Kabelo Tsiane, Sidney Mau, Alex Drlica-Wagner, Jeffrey L. Carlin, Peter S. Ferguson, Keith Bechtol, Ethan O. Nadler, Annika H. G. Peter, Yao-Yuan Mao, Adam J. Thornton, LSST Dark Energy Science Collaboration   +10 more
doaj   +1 more source

All-sky Kinematics of the Distant Halo: The Reflex Response to the LMC

The Astrophysical Journal
The infall of the Large Magellanic Cloud (LMC) is predicted to displace the inner Milky Way (MW), imprinting an apparent “reflex motion” on the observed velocities of distant halo stars. We construct the largest all-sky spectroscopic data set of luminous
Vedant Chandra, Rohan P. Naidu, Charlie Conroy, Nicolas Garavito-Camargo, Chervin Laporte, Ana Bonaca, Phillip A. Cargile, Emily Cunningham, Jiwon Jesse Han, Benjamin D. Johnson, Hans-Walter Rix, Yuan-Sen Ting, Rebecca Woody, Dennis Zaritsky   +13 more
doaj   +1 more source

Constraining the Milky Way Halo Accretion History with Simulated Stellar Halos: Designing the HALO7D-X Survey

The Astrophysical Journal
We present the design for HALO7D-X, a survey of the stellar halo to investigate the accretion history of the Milky Way. The survey will use a combination of Hubble Space Telescope (HST) and Gaia data for sky position and proper motions of faint stars (18 
Miranda Apfel, Kevin McKinnon, Constance M. Rockosi, Puragra Guhathakurta, Kathryn V. Johnston   +4 more
doaj   +1 more source

Using the Two-point Correlation Function to Understand the Assembly Histories of Milky Way–like Galaxies

The Astrophysical Journal
The two-point correlation function (2PCF) is a powerful statistical tool to measure galaxy clustering. Although 2PCF has also been used to study the clustering of stars on subparsec to kiloparsec scales, its physical implication is not clear.
Yike Zhang, Wenting Wang, Jiaxin Han, Xiaohu Yang, Vicente Rodriguez-Gomez, Carles G. Palau, Zhenlin Tan   +6 more
doaj   +1 more source

Satellites of Simulated Galaxies: survival, merging, and their relation to the dark and stellar halos

, 2007
We study the population of satellite galaxies formed in a suite of N-body/gasdynamical simulations of galaxy formation in a LCDM universe. We find little spatial or kinematic bias between the dark matter and the satellite population.
Abadi, M. G., Navarro, J. F., Sales, L. V., Steinmetz, M.   +3 more
core   +3 more sources

Figuring Out Gas and Galaxies in Enzo (FOGGIE). VII. The (Dis)assembly of Stellar Halos

The Astrophysical Journal
Over the next decade, the astronomical community will be commissioning multiple wide-field observatories well suited for studying stellar halos in both integrated light and resolved stars. In preparation for this, we use five high-resolution cosmological
Anna C. Wright, Jason Tumlinson, Molly S. Peeples, Brian W. O’Shea, Cassandra Lochhaas, Lauren Corlies, Britton D. Smith, Nguyen Binh, Ramona Augustin, Raymond C. Simons   +9 more
doaj   +1 more source