Results 21 to 30 of about 28,214 (291)
The Astrophysical Journal, 2023 Stellar streams in the Galactic halo are useful probes of the assembly of galaxies like the Milky Way. Many tidal stellar streams that have been found in recent years are accompanied by a known progenitor globular cluster or dwarf galaxy.
Keith Hawkins +10 more
doaj +1 more source
Multiple Components of the Jhelum Stellar Stream [PDF]
The Astrophysical Journal Letters, 2019 Abstract In simple models of the Milky Way, tidally disrupting satellites produce long and thin—nearly one-dimensional—stellar streams. Using astrometric data from the Gaia second data release and photometry from the Dark Energy Survey, we demonstrate that the Jhelum stream, a stellar stream in the inner halo, is a two-dimensional ...
Ana Bonaca +3 more
openaire +3 more sources
Stream Fanning and Bifurcations: Observable Signatures of Resonances in Stellar Stream Morphology
The Astrophysical Journal, 2023 Recent observations have revealed a trove of unexpected morphological features in many of the Milky Way’s stellar streams. Explanations for such features include time-dependent deformations of the Galactic gravitational potential, local disruptions ...
Tomer D. Yavetz +4 more
doaj +1 more source
Effects of chaos on the detectability of stellar streams [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT Observations show that stellar streams originating in satellite dwarf galaxies are frequent in the Universe. While such events are predicted by theory, it is not clear how many of the streams that are generated are washed out afterwards to the point in which it is impossible to detect them.
Mestre, Martín +2 more
openaire +6 more sources
Streams in the Aquarius stellar haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We use the very high resolution, fully cosmological simulations from the Aquarius project, coupled to a semi-analytical model of galaxy formation, to study the phase-space distribution of halo stars in "solar neighbourhood"-like volumes. We find that this distribution is very rich in substructure in the form of stellar streams for all five stellar ...
F. A. Gomez +5 more
openaire +3 more sources
The stellar halo of the Galaxy [PDF]
, 2008 Stellar halos may hold some of the best preserved fossils of the formation history of galaxies. They are a natural product of the merging processes that probably take place during the assembly of a galaxy, and hence may well be the most ubiquitous ...
A Frebel +240 more
core +12 more sources
Modeling the gravitational potential of a cosmological dark matter halo with stellar streams [PDF]
, 2016 Stellar streams result from the tidal disruption of satellites and star clusters as they orbit a host galaxy, and can be very sensitive probes of the gravitational potential of the host system. We select and study narrow stellar streams formed in a Milky-
Hartke, Johanna +2 more
core +2 more sources
Are symmetric tidal streams possible with long-range dark-matter forces? [PDF]
, 2009 The unique dynamics of the tidal disruption of satellite galaxies is an extremely sensitive probe of long-range interactions between dark-matter particles.
Kesden, Michael
core +2 more sources
Stellar streams as gravitational experiments [PDF]
Astronomy and Astrophysics, 2018 Kinematically cold tidal streams of globular clusters (GC) are excellent tracers of the Galactic gravitational potential at moderate Galactocentric distances, and can also be used as probes of the law of gravity on Galactic scales. Here, we compare for the first time the generation of such streams in Newtonian and Milgromian gravity (MOND).
G. F. Thomas +5 more
openaire +4 more sources
On the Stability of Tidal Streams [PDF]
, 2011 We explore the stability of tidal streams to perturbations, motivated by recent claims that the clumpy structure of the stellar streams surrounding the globular cluster Palomar 5 are the result of gravitational instability.
Moore, Ben, Schneider, Aurel
core +1 more source