Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Trick, Wilma H."'
Publikováno v:
MNRAS, 2023, Volume 523, Issue 1, pp.991-1008
Action-based dynamical modelling, using stars as dynamical tracers, is an excellent diagnostic to estimate the underlying axisymmetric matter distribution of the Milky Way. However, the Milky Way's bar causes non-axisymmetric resonance features in th
Externí odkaz:
http://arxiv.org/abs/2212.06184
The Galactic disk exhibits complex chemical and dynamical substructure thought to be induced by the bar, spiral arms, and satellites. Here, we explore the chemical signatures of bar resonances in action and velocity space and characterize the differe
Externí odkaz:
http://arxiv.org/abs/2105.05263
Autor:
Trick, Wilma H.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 509, Issue 1, January 2022, Pages 844-865
The Milky Way disk exhibits intricate orbit substructure of still-debated dynamical origin. The angle variables $(\theta_\phi,\theta_R)$ -- which are conjugates to the actions $(L_z,J_R)$, and describe a star's location along its orbit -- are a power
Externí odkaz:
http://arxiv.org/abs/2011.01233
Autor:
Coronado, Johanna, Rix, Hans-Walter, Trick, Wilma H., El-Badry, Kareem, Rybizki, Jan, Xiang, Maosheng
Stars born at the same time in the same place should have formed from gas of the same element composition. But most stars subsequently disperse from their birth siblings, in orbit and orbital phase, becoming 'field stars'. Here we explore and provide
Externí odkaz:
http://arxiv.org/abs/2002.09496
Many astrophysical and galaxy-scale cosmological problems require a well determined gravitational potential which is often modeled by observers under strong assumptions. Globular clusters (GCs) surrounding galaxies can be used as dynamical tracers of
Externí odkaz:
http://arxiv.org/abs/1909.04673
Autor:
Halbesma, Timo L. R., Grand, Robert J. J., Gómez, Facundo A., Marinacci, Federico, Pakmor, Rüdiger, Trick, Wilma H., Busch, Philipp, White, Simon D. M.
We investigate whether the galaxy and star formation model used for the Auriga simulations can produce a realistic globular cluster (GC) population. We compare statistics of GC candidate star particles in the Auriga haloes with catalogues of the Milk
Externí odkaz:
http://arxiv.org/abs/1909.02630
Autor:
Trick, Wilma H., Fragkoudi, Francesca, Hunt, Jason A. S., Mackereth, J. Ted, White, Simon D. M.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 500, Issue 2, January 2021, Pages 2645-2665
Action space synthesizes the orbital information of stars and is well-suited to analyse the rich kinematic substructure of the disc in the \emph{Gaia} DR2 radial velocity sample (RVS). We revisit the strong perturbation induced in the Milky Way (MW)
Externí odkaz:
http://arxiv.org/abs/1906.04786
Autor:
Hunt, Jason A. S., Bub, Mathew W., Bovy, Jo, Mackereth, J. Ted, Trick, Wilma H., Kawata, Daisuke
Gaia DR2 has provided an unprecedented wealth of information about the kinematics of stars in the Solar neighbourhood, and has highlighted the degree of features in the Galactic disc. We confront the data with a range of bar and spiral models in both
Externí odkaz:
http://arxiv.org/abs/1904.10968
Autor:
Mackereth, J. Ted, Bovy, Jo, Leung, Henry W., Schiavon, Ricardo P., Trick, Wilma H., Chaplin, William J., Cunha, Katia, Feuillet, Diane K., Majewski, Steven R., Martig, Marie, Miglio, Andrea, Nidever, David, Pinsonneault, Marc H., Aguirre, Victor Silva, Sobeck, Jennifer, Tayar, Jamie, Zasowski, Gail
The kinematics of the Milky Way disc as a function of age are well measured at the solar radius, but have not been studied over a wider range of Galactocentric radii. Here, we measure the kinematics of mono-age, mono-$\mathrm{[Fe/H]}$ populations in
Externí odkaz:
http://arxiv.org/abs/1901.04502
Publikováno v:
MNRAS, 484, 3291 (2019)
The quality and quantity of 6D stellar position-velocity measurements in the second Gaia data release (DR2) allows to study small-scale structure in the orbit distribution of the Galactic disc beyond the immediate Solar neighborhood. We investigate t
Externí odkaz:
http://arxiv.org/abs/1805.03653