Results 31 to 40 of about 28,214 (291)
The Astrophysical Journal, 2022 Stellar streams from globular clusters (GCs) offer constraints on the nature of dark matter and have been used to explore the dark matter halo structure and substructure of our Galaxy. Detection of GC streams in other galaxies would broaden this endeavor
Sarah Pearson +7 more
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Four New Stellar Debris Streams in the Galactic Halo [PDF]
, 2008 We report on the detection of four new stellar debris streams and a new dwarf galaxy candidate in the Sloan Digital Sky Survey. Three of the streams, ranging between 3 and 15 kpc in distance and spanning between 37 and 84 degrees on the sky, are very ...
Allen +24 more
core +2 more sources
Separatrix divergence of stellar streams in galactic potentials [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACTFlattened axisymmetric galactic potentials are known to host minor orbit families surrounding orbits with commensurable frequencies. The behaviour of orbits that belong to these orbit families is fundamentally different than that of typical orbits with non-commensurable frequencies. We investigate the evolution of stellar streams on orbits near
Tomer D Yavetz +4 more
openaire +2 more sources
Open Astronomy, 2021 We introduce the application of the clustering algorithm to the preliminary compiled list of probable wide pairs of co-moving stars. The main aim of such development is a possibility of unsupervised blind search of coeval loose stellar structures over ...
Sapozhnikov Sergei, Kovaleva Dana
doaj +1 more source
Galactic Spiral Structure [PDF]
, 2009 We describe the structure and composition of six major stellar streams in a population of 20 574 local stars in the New Hipparcos Reduction with known radial velocities. We find that, once fast moving stars are excluded, almost all stars belong to one of
Arnold V. I. +5 more
core +1 more source
The Astrophysical Journal, 2023 We present spectroscopic chemical abundances of red giant branch stars in Andromeda (M31), using medium-resolution ( R ∼ 6000) spectra obtained via the Spectroscopic and Photometric Landscape of Andromeda’s Stellar Halo survey.
J. Leigh Wojno +8 more
doaj +1 more source
Search for Stellar Streams in The Galactic Halo From Gaia DR2, GALAH DR2, RAVE DR5 and LAMOST DR4 Data [PDF]
EPJ Web of Conferences, 2020 Stellar streams are stars which are trapped in the same potensial caused by dynamical resonance or tidal force. We aim to analyze kinematic sub- structures (streams) in the Galactic halo by V vs √ U2+ 2V 2 planes of Arifyanto & Fuchs.
Made Kartika Wijayanti Ni +2 more
doaj +1 more source
Stellar Motions in the Polar Ring Galaxy NGC 4650A [PDF]
, 2003 We present the first measurement of the stellar kinematics in the polar ring of NGC 4650A. There is well defined rotation, with the stars and gas rotating in the same direction, and with similar amplitude.
Combes F., Rob A. Swaters, Vera C. Rubin
core +1 more source
A DETECTION OF GAS ASSOCIATED WITH THE M31 STELLAR STREAM [PDF]
The Astrophysical Journal, 2015 10 pages, 5 figures, accepted for publication in the Astrophysical ...
Koch, Andreas +4 more
openaire +2 more sources
Two chemically similar stellar overdensities on opposite sides of the plane of the Galaxy [PDF]
, 2018 Our Galaxy is thought to have undergone an active evolutionary history dominated by star formation, the accretion of cold gas, and, in particular, mergers up to 10 gigayear ago.
A Helmi +74 more
core +3 more sources