Results 21 to 30 of about 453,739 (281)
Stellar streams in chameleon gravity [PDF]
Physical Review D, 2020 Theories of gravity that incorporate new scalar degrees of freedom typically require screening mechanisms to ensure consistency with Solar System tests. One widely-studied mechanism -- the chameleon -- can lead to violations of the equivalence principle (EP), as screened and unscreened objects fall differently.
A. P. Naik +4 more
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Discovery and Modeling of Milky Way Stellar Streams [PDF]
, 2021 Stellar streams, the tidal remnants of accreted globular clusters and dwarf galaxies, are uniquely powerful tools for studying the Milky Way. In particular, they allow for strong constraints on the local distribution of dark matter, and they provide ...
Shipp, Nora
core +1 more source
A cold stellar stream in Pegasus [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 We report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the color--magnitude diagram that is optimised for a stellar population that is 8 Gyr old with [Fe/H] = $-$0.46 dex, and located at ...
Hélio D Perottoni +5 more
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The structure of accreted stellar streams [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Many of the Milky Way’s globular clusters are likely accreted from satellite galaxies that have long since merged with the Milky Way. When these globular clusters are susceptible to tidal disruption, this process likely starts already inside the parent satellite leading to an early stellar stream within the satellite.
Yansong Qian, Yumna Arshad, Jo Bovy
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Chemical abundances of the Typhon stellar stream
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We present the first high-resolution chemical abundances of seven stars in the recently discovered high-energy stream Typhon. Typhon stars have apocentres r ≳ 100 kpc, making this the first detailed chemical picture of the Milky Way’s very distant stellar halo.
Alexander P Ji +4 more
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A comprehensive view of the Virgo stellar stream [PDF]
Astronomy & Astrophysics, 2014 16 pages, 13 figures, 11 tables, Accepted for publication in A& ...
Duffau, Sonia +4 more
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Measuring the Sun's motion with stellar streams [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We present a method for measuring the Sun's motion using the proper motions of Galactic halo star streams. The method relies on the fact that the motion of the stars perpendicular to a stream from a low-mass progenitor is close to zero when viewed from a non-rotating frame at rest with respect to the Galaxy, and that the deviation from zero is due to ...
Malhan, Khyati, Ibata, Rodrigo
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The nature of the KFR08 stellar stream [PDF]
Astronomy & Astrophysics, 2015 9 pages, 6 figures, accepted for publication in A& ...
C. Liu, S. Feltzing, G. Ruchti
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KINEMATIC DISCOVERY OF A STELLAR STREAM LOCATED IN PISCES [PDF]
The Astrophysical Journal, 2013 We report the kinematic discovery of the Pisces Stellar Stream (PSS), at Galactic longitude of roughly l=135 degrees and longitude between -39 < b < -36 deg. We originally identified this halo substructure from velocities of red giant branch stars in Sloan Digital Sky Survey (SDSS) Data Release 8, and confirmed its presence in turnoff stars from ...
Martin, Charles +3 more
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The Galaxy Progenitors of Stellar Streams around Milky Way–mass Galaxies in the FIRE Cosmological Simulations [PDF]
, 2021 Stellar streams record the accretion history of their host galaxy. We present a set of simulated streams from disrupted dwarf galaxies in 13 cosmological simulations of Milky Way (MW)–mass galaxies from the FIRE-2 suite at z = 0, including seven isolated
Sanderson, Robyn E +11 more
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