Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Jason A S Hunt"'
Autor:
Emily C. Cunningham, Jason A. S. Hunt, Adrian M. Price-Whelan, Kathryn V. Johnston, Melissa K. Ness, Yuxi (Lucy) Lu, Ivanna Escala, Ioana A. Stelea
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 2, p 95 (2024)
The stellar stream connected to the Sagittarius (Sgr) dwarf galaxy is the most massive tidal stream that has been mapped in the Galaxy, and is the dominant contributor to the outer stellar halo of the Milky Way (MW). We present metallicity maps of th
Externí odkaz:
https://doaj.org/article/88cd17b25ac3497ea0c88ac466f617a3
Autor:
Danny Horta, Adrian M. Price-Whelan, David W. Hogg, Kathryn V. Johnston, Lawrence Widrow, Julianne J. Dalcanton, Melissa K. Ness, Jason A. S. Hunt
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 165 (2024)
Under the assumption of a simple and time-invariant gravitational potential, many Galactic dynamics techniques infer the milky Way’s mass and dark matter distributions from stellar kinematic observations. These methods typically rely on parameteriz
Externí odkaz:
https://doaj.org/article/fc4c1d904b3c4e8489580edf98260966
Autor:
Daniel R. Hey, Daniel Huber, Benjamin J. Shappee, Joss Bland-Hawthorn, Thor Tepper-García, Robyn Sanderson, Sukanya Chakrabarti, Nicholas Saunders, Jason A. S. Hunt, Timothy R. Bedding, John Tonry
Publikováno v:
The Astronomical Journal, Vol 166, Iss 6, p 249 (2023)
The Galactic bulge is critical to our understanding of the Milky Way. However, due to the lack of reliable stellar distances, the structure and kinematics of the bulge/bar beyond the Galactic center have remained largely unexplored. Here, we present
Externí odkaz:
https://doaj.org/article/cd1f668a325743c1a0a983eee320093c
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 74 (2023)
The recent discovery of a spiral pattern in the vertical kinematic structure in the solar neighborhood provides a prime opportunity to study nonequilibrium dynamics in the Milky Way from local stellar kinematics. Furthermore, results from simulations
Externí odkaz:
https://doaj.org/article/69e8a61d51614b56ae7dcdb79289fe0e
We present the first application of the made-to-measure method for modelling dynamical systems to globular clusters. Through the made-to-measure algorithm, the masses of individual particles within a model cluster are adjusted while the system evolve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bd608568d63d29a87e1c6cf389bde1d
http://arxiv.org/abs/2212.06847
http://arxiv.org/abs/2212.06847
{\it Gaia} Data Release 2 (DR2) revealed that the Milky Way contains significant indications of departures from equilibrium in the form of asymmetric features in the phase space density of stars in the Solar neighborhood. One such feature is the $z$-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6ac6321602d9b43854e979e1275513f
http://arxiv.org/abs/2206.06125
http://arxiv.org/abs/2206.06125
The distance to the Galactic centre R0 is a fundamental parameter for understanding the Milky Way, because all observations of our Galaxy are made from our heliocentric reference point. The uncertainty in R0 limits our knowledge of many aspects of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d8c3afdadddad0256fe90c6fde1ff92
http://arxiv.org/abs/2204.12551
http://arxiv.org/abs/2204.12551
Autor:
Madeline Lucey, Sarah Pearson, Jason A S Hunt, Keith Hawkins, Melissa Ness, Michael S Petersen, Adrian M Price-Whelan, Martin D Weinberg
We present a novel method for constraining the length of the Galactic bar using 6D phase space information to directly integrate orbits. We define a pseudo-length for the Galactic bar, named $R_{Freq}$, based on the maximal extent of trapped bar orbi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00d45c6cd2d9d019e64631bbbc6f618c
The ongoing merger of the Sagittarius (Sgr) dwarf galaxy with the Milky Way is believed to strongly affect the dynamics of the Milky Way's disc. We present a suite of 13 $N$-body simulations, with 500 million to 1 billion particles, modelling the int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48c2c8ff93258560033525e37acfbccb
http://arxiv.org/abs/2107.08055
http://arxiv.org/abs/2107.08055
Autor:
Jason A. S. Hunt, Jeroen Bédorf, Kathryn V. Johnston, Ioana A. Stelea, Chervin F. P. Laporte, Suroor S. Gandhi
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Monthly Notices of the Royal Astronomical Society, 508(1), 1459-1472
instname
Monthly Notices of the Royal Astronomical Society, 508(1), 1459-1472
In this work we present two new $\sim10^9$ particle self-consistent simulations of the merger of a Sagittarius-like dwarf galaxy with a Milky Way-like disc galaxy. One model is a violent merger creating a thick disc, and a Gaia-Enceladus/Sausage like
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::070a2adf8d1a222f28630b21e29e7cbb