Results 11 to 20 of about 346,903 (248)
Stellar halos and the link to galaxy formation [PDF]
Proceedings of the International Astronomical Union, 2016 I 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 ...
Romano, D. +4 more
core +3 more sources
The “Building Blocks” of Stellar Halos [PDF]
Galaxies, 2017 The stellar halos of galaxies encode their accretion histories. In particular, the median metallicity of a halo is determined primarily by the mass of the most massive accreted object.
Kyle A. Oman +2 more
doaj +2 more sources
A ‘Universal’ Density Profile for the Outer Stellar Halos of Galaxies [PDF]
Proceedings of the International Astronomical Union, 2016 The outer stellar halos of galaxies contain vital information about the formation history of galaxies, since the relaxation timescales in the outskirts are long enough to keep the memory, while the information about individual formation events in the ...
Remus, R. +5 more
core +5 more sources
Stellar halos of bright central galaxies
Astronomy & AstrophysicsAims. We investigate the formation and evolution of stellar halos (SHs) around bright central galaxies (BCGs), focusing on their scaling relations, colors, and metallicities across cosmic time, and we compare model predictions with ultra-deep imaging ...
Contini Emanuele +4 more
doaj +2 more sources
Dependence of stellar substructures in M31 type galaxy on satellite morphology in galaxy mergers [PDF]
Serbian Astronomical Journal, 2022 Stellar streams and shells are observed in halos of spiral galaxies. In this paper, we investigated the formation of these structures due to mergers between the host spiral galaxy and its dwarf satellite galaxies.
Milošević S.
doaj +1 more source
Building up the stellar halo of the Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 We study numerical simulations of satellite galaxy disruption in a potential resembling that of the Milky Way. Our goal is to assess whether a merger origin for the stellar halo would leave observable fossil structure in the phase-space distribution of nearby stars.
Helmi, A., White, S.
openaire +3 more sources
The Stellar Halo of the Galaxy is Tilted and Doubly Broken
The Astronomical Journal, 2022 Abstract Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our galaxy (Gaia–Sausage–Enceladus, GSE). Using chemical abundances and kinematics from the H3 Survey, we identify 5559 halo stars from this merger in the radial range r Gal
Jiwon Jesse Han +9 more
openaire +2 more sources
Tilted Dark Halos Are Common and Long-lived, and Can Warp Galactic Disks
The Astrophysical Journal Letters, 2023 In the Lambda cold dark matter paradigm, the dark halo governs the gravitational potential within which a galaxy can form and evolve. In this Letter we show that the present-day inner ( r < 50 kpc) dark halo can be significantly misaligned with the ...
Jiwon Jesse Han +3 more
doaj +1 more source
On the formation of dwarf galaxies and stellar haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 15 pages, 7 figures, one figure added to match accepted version. Some typos fixed.
Read J. I, Pontzen A. P, Viel, Matteo
openaire +6 more sources
Mass Dependence of Galaxy–Halo Alignment in LOWZ and CMASS
The Astrophysical Journal, 2023 We measure the galaxy-ellipticity (GI) correlations for the Sloan Digital Sky Survey Data Release 12 LOWZ and CMASS samples with the shape measurements from the DESI Legacy Imaging Surveys.
Kun Xu, Y. P. Jing, Hongyu Gao
doaj +1 more source