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We have determined masses, stellar mass functions and structural parameters of 112 Milky Way globular clusters by fitting a large set of N-body simulations to their velocity dispersion and surface density profiles. The velocity dispersion…

Astrophysics of Galaxies · Physics 2018-07-03 H. Baumgardt , M. Hilker

We present the results of a new, non-parametric method to reconstruct the Galactic dark matter profile directly from observations. Using the latest kinematic data to track the total gravitational potential and the observed distribution of…

Astrophysics of Galaxies · Physics 2015-05-07 Miguel Pato , Fabio Iocco

The mass distribution in the Galaxy is determined by dynamical and photometric methods. Rotation curves are the major tool for determining the dynamical mass distribution in the Milky Way and spiral galaxies. The photometric (statistical)…

Astrophysics of Galaxies · Physics 2015-06-16 Yoshiaki Sofue

We present a sample of 254,882 luminous red giant branch (LRGB) stars selected from the APOGEE and LAMOST surveys. By combining photometric and astrometric information from the 2MASS and Gaia surveys, the precise distances of the sample…

Astrophysics of Galaxies · Physics 2023-04-12 Yuan Zhou , Xinyi Li , Yang Huang , Huawei Zhang

We use our vertical Milky Way disc model together with Galaxia to create mock observations of stellar samples in the solar neighbourhood. We compare these to the corresponding volume complete observational samples of dereddened and binary…

Astrophysics of Galaxies · Physics 2015-06-23 Jan Rybizki , Andreas Just

We provide a purely dynamical global map of the non-axisymmetric structure of the Milky Way disk. For this, we exploit the information contained within the in-plane motions of disk stars from Gaia DR3 to adjust a model of the Galactic…

Astrophysics of Galaxies · Physics 2025-07-16 Y. R. Khalil , B. Famaey , G. Monari , M. Bernet , A. Siebert , R. Ibata , G. F. Thomas , P. Ramos , T. Antoja , C. Li , S. Rozier , M. Romero-Gómez

The local stellar kinematics of the Milky Way offer a useful tool for studying the rotation curve of the Galaxy. These kinematics -- usually parameterized by the Oort constants A and B -- depend on the local gradient of the rotation curve…

Astrophysics · Physics 2009-10-30 R. P. Olling , M. R. Merrifield

We use the adiabatic compression theory to build a physically well - motivated Milky Way mass model in agreement with the observational data. The visible mass of the Galaxy is distributed in a spheroidal bulge and a multi - components disc…

Astrophysics · Physics 2009-11-10 V. F. Cardone , M. Sereno

Like many other late-type galaxies, the Milky Way contains a nuclear star cluster. In this work we obtain the basic properties of its dominant old stellar population. Firstly, we derive its structural properties by constructing a stellar…

The spiral structure of the Milky Way is not yet well determined. The keys to understanding this structure are to increase the number of reliable spiral tracers and to determine their distances as accurately as possible. HII regions, giant…

Astrophysics of Galaxies · Physics 2014-10-15 L. G. Hou , J. L. Han

The phase spiral is a perturbation to the vertical phase-space distribution of stars in the Milky Way disk. We study the phase spiral's properties and how they vary with spatial position, in order to constrain its origin and evolution, as…

Astrophysics of Galaxies · Physics 2025-07-29 Axel Widmark , Kiyan Tavangar , Josh Kalish , Kathryn V. Johnston , Jason A. S. Hunt

We assess the fraction of the Milky Way's circumgalactic medium (CGM) eluding detection due to its velocity being similar to gas in the disk. This is achieved using synthetic observations of the CGM in a simulated MW-mass galaxy that shows…

Astrophysics of Galaxies · Physics 2017-11-02 Y. Zheng , M. E. Putman , J. E. G. Peek , M. R. Joung

This article summarizes the structural parameters of the Galactic bulge and disk, and discusses the interpretation of the bulge microlensing observations and the determination of the Milky Way's luminous mass from the terminal velocity…

Astrophysics · Physics 2007-05-23 Ortwin Gerhard

We present RoadMapping, a full-likelihood dynamical modelling machinery that aims to recover the Milky Way's (MW) gravitational potential from large samples of stars in the Galactic disk. RoadMapping models the observed positions and…

Astrophysics of Galaxies · Physics 2016-10-26 Wilma H. Trick , Jo Bovy , Hans-Walter Rix

We analyse a sample of 52,000 Milky Way (MW) type galaxies drawn from the publicly available galaxy catalogue of the Millennium Simulation with the aim of studying statistically the differences and similarities of their properties in…

We present a new measurement of the mass of the Milky Way (MW) based on observed properties of its largest satellite galaxies, the Magellanic Clouds (MCs), and an assumed prior of a {\Lambda}CDM universe. The large, high-resolution Bolshoi…

Astrophysics of Galaxies · Physics 2015-05-20 Michael T. Busha , Philip J. Marshall , Risa H. Wechsler , Anatoly Klypin , Joel Primack

The ellipsoid of stellar random motions is a fundamental ingredient of galaxy dynamics. Yet it has long been difficult to constrain this component in disks others than the Milky Way. This article presents the modeling of the…

Astrophysics of Galaxies · Physics 2018-10-24 Laurent Chemin

The all-particle spectrum of cosmic rays measured at Earth has a knee-like feature around 4 PeV. A priori, it is not clear if this is a local feature specific to the Solar neighbourhood in the Milky Way, or if it is a generic property of…

High Energy Astrophysical Phenomena · Physics 2025-07-17 C. Prevotat , M. Kachelriess , S. Koldobskiy , A. Neronov , D. Semikoz

We present a new model of the three-dimensional distribution of molecular gas in the Milky Way Galaxy, based on CO line data. Our analysis is based on a gas-flow simulation of the inner Galaxy using smoothed-particle hydrodynamics (SPH)…

Astrophysics · Physics 2009-06-23 Martin Pohl , Peter Englmaier , Nicolai Bissantz

The Hypervelocity Star survey presents the currently largest sample of radial velocity measurements of halo stars out to 80 kpc. We apply spherical Jeans modeling to these data in order to derive the mass profile of the Galaxy. We restrict…

Astrophysics of Galaxies · Physics 2010-08-31 Oleg Y. Gnedin , Warren R. Brown , Margaret J. Geller , Scott J. Kenyon
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