Results 11 to 20 of about 97,868 (355)
Tracing Galaxy Formation with Stellar Halos. I. Methods [PDF]
The Astrophysical Journal, 2005 If the favored hierarchical cosmological model is correct, then the Milky Way system should have accreted ~100-200 luminous satellite galaxies in the past ~12 Gyr.
J. Bullock, K. Johnston
semanticscholar +4 more sources
THE STELLAR HALOS OF MASSIVE ELLIPTICAL GALAXIES [PDF]
The Astrophysical Journal, 2012 We use the Mitchell Spectrograph (formerly VIRUS-P) on the McDonald Observatory 2.7 m Harlan J. Smith Telescope to search for the chemical signatures of massive elliptical galaxy assembly.
J. Greene +4 more
semanticscholar +4 more sources
Dwarf Galaxies Also Have Stellar Halos [PDF]
The Astrophysical Journal, 1996 We present evidence for the existence of an old stellar halo in the dwarf irregular galaxy WLM, an isolated member of the Local Group. The halo consists of Population II stars, with low metallicities and age ≥1010 yr.
D. Minniti, A. Zijlstra
semanticscholar +4 more sources
The elusive stellar halo of the Triangulum galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 The stellar halos of large galaxies represent a vital probe of the processes of galaxy evolution. They are the remnants of the initial bouts of star formation during the collapse of the proto-galactic cloud, coupled with imprint of ancient and on-going ...
B. McMonigal +10 more
semanticscholar +7 more sources
Planetary nebulae as kinematic tracers of galaxy stellar halos [PDF]
Proceedings of the International Astronomical Union, 2016 The kinematic and dynamical properties of galaxy stellar halos are difficult to measure because of the faint surface brightness that characterizes these regions.
L. Coccato
semanticscholar +4 more sources
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.
A. Helmi, S. D. M. White
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Stellar Halos from the The Dragonfly Edge-on Galaxies Survey [PDF]
The Astrophysical Journal, 2022 Abstract We present the primary results from the Dragonfly Edge-on Galaxies Survey, an exploration of the stellar halos of twelve nearby (d < 25 Mpc) edge-on disk galaxies with the Dragonfly Telephoto Array. The edge-on orientation of these galaxies allows their stellar halos to be explored with minimal obscuration by or confusion ...
Colleen Gilhuly +8 more
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Parametrizing the stellar haloes of galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We study the stellar haloes of galaxies out to 70-100 kpc as a function of stellar mass and galaxy type by stacking aligned $r$ and $g$ band images from a sample of 45508 galaxies from SDSS DR9 in the redshift range $0.06\,\le\,z\,\le\,0.1$ and in the mass range $10^{10.0} M_{\odot} < M_{*} < 10^{11.4} M_{\odot}$r.
Richard D’Souza +3 more
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Stellar halos in Illustris: probing the histories of Milky Way-mass galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The existence of stellar halos around galaxies is a natural prediction of the hierarchical nature of the LambdaCDM model. Recent observations of Milky Way-like galaxies have revealed a wide range in stellar halo mass, including cases with no ...
Lydia M. Elias +6 more
semanticscholar +1 more source
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