Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Martin D. Weinberg"'
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 1, p 65 (2023)
We develop a linear perturbative formalism to compute the response of an inhomogeneous stellar disk embedded in a nonresponsive dark matter (DM) halo to various perturbations like bars, spiral arms, and encounters with satellite galaxies. Without sel
Externí odkaz:
https://doaj.org/article/14d249f6cbf24cf2a29b700c190286b1
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 521:1757-1774
Studying coupling between different galactic components is a challenging problem in galactic dynamics. Using basis function expansions (BFEs) and multichannel singular spectrum analysis (mSSA) as a means of dynamical data mining, we discover evidence
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 510:6201-6217
We present the N-body simulation techniques in EXP. EXP uses empirically-chosen basis functions to expand the potential field of an ensemble of particles. Unlike other basis function expansions, the derived basis functions are adapted to an input mas
Galactic disks are highly responsive systems that often undergo external perturbations and subsequent collisionless equilibration, predominantly via phase-mixing. We use linear perturbation theory to study the response of infinite isothermal slab ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4145ebdd36a7b75c682c7456aecaa19
http://arxiv.org/abs/2208.05038
http://arxiv.org/abs/2208.05038
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 501:5408-5423
N-body simulations provide most of our insight into the structure and evolution of galaxies, but our analyses of these are often heuristic and from simple statistics. We propose a method that discovers the dynamics in space and time together by findi
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:838-858
We interpret simulations of secularly evolving disc galaxies through orbit morphology. Using a new algorithm that measures the volume of orbits in real space using a tessellation, we rapidly isolate commensurate (resonant) orbits. We identify phase-s
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
Autor:
Sarah Pearson, Adrian M. Price-Whelan, Tomer D. Yavetz, Kathryn V. Johnston, Martin D. Weinberg
Flattened axisymmetric galactic potentials are known to host minor orbit families surrounding orbits with commensurable frequencies. The behavior of orbits that belong to these orbit families is fundamentally different than that of typical orbits wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::419a1b4f668021c06351ea4d1c39ad46
http://arxiv.org/abs/2011.11919
http://arxiv.org/abs/2011.11919
Autor:
Adrian M. Price-Whelan, Kathryn V. Johnston, Nicolas Garavito-Camargo, Facundo A. Gómez, Emily C. Cunningham, Gurtina Besla, Martin D. Weinberg, Chervin F. P. Laporte
Indications of disequilibrium throughout the Milky Way (MW) highlight the need for compact,flexible, non-parametric descriptions of phase--space distributions of galaxies. We present a new representation of the current Dark Matter (DM) distribution a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ea899bfe3fa79feb923376dddefa5e0