Results 61 to 70 of about 97,868 (355)

BROKEN AND UNBROKEN: THE MILKY WAY AND M31 STELLAR HALOS [PDF]

, 2012
We use the Bullock & Johnston suite of simulations to study the density profiles of L*-type galaxy stellar halos. Observations of the Milky Way and M31 stellar halos show contrasting results: the Milky Way has a “broken” profile, where the density falls ...
A. Deason, V. Belokurov, N. Evans, K. Johnston   +3 more
semanticscholar   +1 more source

Hierarchical Galaxy Formation and Substructure in the Galaxy’s Stellar Halo

The Astrophysical Journal, 2001
We develop an explicit model for the formation of the stellar halo from tidally disrupted, accreted dwarf satellites in the cold dark matter (CDM) framework, focusing on predictions testable with the Sloan Digital Sky Survey (SDSS) and other wide-field surveys. Subhalo accretion and orbital evolution are calculated using a semi-analytic approach within
Bullock, James S., Kravtsov, Andrey V., Weinberg, David H.   +2 more
openaire   +2 more sources

CHARACTERIZING THE FORMATION HISTORY OF MILKY WAY LIKE STELLAR HALOS WITH MODEL EMULATORS [PDF]

, 2012
We use the semi-analytic model ChemTreeN, coupled to cosmological N-body simulations, to explore how different galaxy formation histories can affect observational properties of Milky Way like galaxies' stellar halos and their satellite populations ...
F. G'omez, C. Coleman-Smith, B. O’Shea, J. Tumlinson, R. Wolpert   +4 more
semanticscholar   +1 more source

Stellar halos and the link to galaxy formation [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractI present a brief overview of how stellar halos may be used to constrain the process of galaxy formation. In particular, streams and substructure in stellar halos trace merger events but can also be used to determine the mass distribution of the host galaxy and hence put constraints on the nature of dark matter.
Helmi, Amina, Bragaglia, A., Arnaboldi, M., Rejkuba, M., Romano, D.   +4 more
openaire   +2 more sources

The accreted stellar halo as a window on halo assembly in L* galaxies [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2017
Abstract Theory and observations agree that the accreted stellar haloes (ASHs) of Milky Way-like galaxies display significant scatter. I take advantage of this stochasticity to invert the link between halo assembly history (HAH) and ASH, using mock ASHs corresponding to 750 ΛCDM HAHs, sharing a final virial mass of Mh(z = 0) = 1012.25M⊙.
N. C. Amorisco
openalex   +5 more sources

Lambda-Cold Dark Matter, Stellar Feedback, and the Galactic Halo Abundance Pattern [PDF]

, 2005
(Abridged) The hierarchical formation scenario for the stellar halo requires the accretion and disruption of dwarf galaxies, yet low-metallicity halo stars are enriched in alpha-elements compared to similar, low-metallicity stars in dwarf spheroidal ...
Andreea S. Font, Bondi H., Brant Robertson, Devriendt J. E. G., Gratton R. G., Gratton R. G., Gratton R. G., Greggio L., Hill V., Hill V., Hill V., Hill V., James S. Bullock, Jasniewicz G., Kathryn V. Johnston, Lacey C., Lars Hernquist, Matteucci F., Matteucci F., Matteucci F., Moore B., Nissen P. E., Pagel B. E. J., Schaller G., Tinsley B. M., Tinsley B. M., Tsujimoto T., Unavane M.   +27 more
core   +2 more sources

The progenitor galaxies of stellar haloes as ‘failed’ Milky Ways

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT The stellar halo of the Milky Way records the history of its interactions with dwarf galaxies, whose subsequent destruction results in the formation of an extended stellar component. Recent works have suggested that galaxies with masses comparable to the Large Magellanic Cloud (LMC, $M_\star \sim 10^9$ M☉) may be the primary ...
Sownak Bose, Alis J Deason
openaire   +3 more sources

Environmental Dependence of the Mass–Metallicity Relation in Cosmological Hydrodynamical Simulations

The Astrophysical Journal, 2023
We investigate the environmental dependence of the gas-phase metallicity for galaxies at z = 0 to z ≳ 2 and the underlying physical mechanisms driving this dependence using state-of-the-art cosmological hydrodynamical simulations.
Kai Wang, Xin Wang, Yangyao Chen
doaj   +1 more source

The Mass Dependance of Satellite Quenching in Milky Way-like Halos [PDF]

, 2014
Using the Sloan Digital Sky Survey, we examine the quenching of satellite galaxies around isolated Milky Way-like hosts in the local Universe. We find that the efficiency of satellite quenching around isolated galaxies is low and roughly constant over ...
Boylan-Kolchin, Michael, Bullock, James S., Cooper, Michael C., Phillips, John I., Tollerud, Erik, Wheeler, Coral   +5 more
core   +1 more source

Red Galaxy Growth and the Halo Occupation Distribution

, 2008
We have traced the past 7 Gyr of red galaxy stellar mass growth within dark matter halos. We have determined the halo occupation distribution, which describes how galaxies reside within dark matter halos, using the observed luminosity function and ...
Andrew J. Benson, Arjun Dey, Bower R. G., Boylan-Kolchin M., Brough S., Buell T. Jannuzi, Darren J. Croton, Dekel A., Kate Brand, Kemp S. N., Mark Brodwin, Martin White, Michael J. I. Brown, Silk J., White S. D. M., Zheng Zheng   +15 more
core   +1 more source