Results 21 to 30 of about 439,382 (287)
Search for Exoplanets in steLLar streAms (SELLA)
, 2022 In this work we search and characterize exoplanets orbiting members of stellar streams, which are structures in the Galaxy composed of stars with similar dynamic and chemical properties, and with galactic or extragalactic origin. With current facilities,
Sánchez, María Luisa +5 more
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Finding Stellar Streams in Photometric Surveys [PDF]
AIP Conference Proceedings, 2008 The advent of high‐quality, wide‐area photometric databases has enabled significant advances in our knowledge of the structure, constituents, and accretion history of our Galaxy.
Grillmair, Carl J.
core +4 more sources
Variation in the stellar mass function along stellar streams [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Stellar streams are the inevitable end product of star cluster evolution, with the properties of a given stream being related to its progenitor. We consider how the dynamical history of a progenitor cluster, as traced by the evolution of its stellar mass function, is reflected in the resultant stream.
Jeremy J Webb, Jo Bovy
openaire +2 more sources
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
openaire +4 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
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
openaire +4 more sources
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
openaire +2 more sources
Building an Acceleration Ladder with Tidal Streams and Pulsar Timing
The Astrophysical Journal Letters, 2023 We analyse stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the potential of our galaxy.
Peter Craig +3 more
doaj +1 more source
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
openaire +2 more sources