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Many barred galaxies, possibly including the Milky Way, have cusps in the centres. There is a widespread belief, however, that usual bar instability taking place in bulgeless galaxy models is impossible for the cuspy models, because of the…

Astrophysics of Galaxies · Physics 2017-02-07 E. V. Polyachenko , P. Berczik , A. Just

It has long been regarded as difficult for a cosmological model to account simultaneously for the galaxy luminosity, mass, and velocity distributions. We revisit this issue using a modern compilation of observational data along with the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Sebastian Trujillo-Gomez , Anatoly Klypin , Joel Primack , Aaron J. Romanowsky

We investigate the gravitational interactions between live stellar disks and their dark matter halos, using LCDM haloes similar in mass to that of the Milky Way taken from the Aquarius Project. We introduce the stellar disks by first…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Jackson DeBuhr , Chung-Pei Ma , Simon D. M. White

We examine the bar instability in galactic models with an exponential disk and a cuspy dark matter (DM) halo with a Navarro-Frenk-White (NFW) cosmological density profile. We construct equilibrium models from a 3-integral composite…

Astrophysics · Physics 2011-02-11 John Dubinski , Ingo Berentzen , Isaac Shlosman

We use the \texttt{GRUMPY} galaxy formation model based on a suite of zoom-in, high-resolution, dissipationless $\Lambda$ Cold Dark Matter ($\Lambda$CDM) simulations of the Milky Way (MW) sized haloes to examine total matter density within…

Astrophysics of Galaxies · Physics 2023-08-02 Andrey Kravtsov , Zewei Wu

Our current understanding of how dark matter (DM) is distributed within the Milky Way halo, particularly in the solar neighborhood, is based on either careful studies of the local stellar orbits, model assumptions on the global shape of the…

We present mass models for a sample of 30 high-resolution rotation curves of low surface brightness (LSB) galaxies. We fit both pseudo-isothermal (core-dominated) and Cold Dark Matter (CDM) (cusp-dominated) halos for a wide variety of…

Astrophysics · Physics 2007-05-23 Erwin de Blok , Stacy McGaugh , Vera Rubin

It has been pointed out that the Galactic satellites all have a common mass around 1e7 Msun within 300 pc (M03), while they span almost four order of magnitudes in luminosity (Mateo et al. 1993, Strigari et al. 2008). It is argued that this…

Astrophysics · Physics 2009-11-13 Andrea V. Maccio' , Xi Kang , Ben Moore

The Luminous Convolution Model (LCM) is an empirical formula, based on a heuristic convolution of Relativistic transformations, which makes it possible to predict the observed rotation curves of a broad class of spiral galaxies from…

Astrophysics of Galaxies · Physics 2015-06-16 S. Cisneros , J. G. O'Brien , N. S. Oblath , J. A. Formaggio

We use particle data from the Illustris simulation, combined with individual kinematic constraints on the mass of the Milky Way (MW) at specific distances from the Galactic center, to infer the radial distribution of the MW's dark matter…

Cosmology and Nongalactic Astrophysics · Physics 2016-07-28 Corbin Taylor , Michael Boylan-Kolchin , Paul Torrey , Mark Vogelsberger , Lars Hernquist

The existence of millicharged dark matter (mDM) can leave a measurable imprint on 21-cm cosmology through mDM-baryon scattering. However, the minimal scenario is severely constrained by existing cosmological bounds on both the fraction of…

High Energy Physics - Phenomenology · Physics 2019-12-25 Hongwan Liu , Nadav Joseph Outmezguine , Diego Redigolo , Tomer Volansky

We present mass and mass profile estimates for the Milky Way Galaxy using the Bayesian analysis developed by Eadie et al (2015b) and using globular clusters (GCs) as tracers of the Galactic potential. The dark matter and GCs are assumed to…

Astrophysics of Galaxies · Physics 2016-10-11 Gwendolyn M. Eadie , William Harris

In an attempt to place an explicit constraint on dark matter models, we define and estimate a mean surface density of a dark halo within a radius of maximum circular velocity, which is derivable for various galaxies with any dark-matter…

Astrophysics of Galaxies · Physics 2015-06-24 Kohei Hayashi , Masashi Chiba

We construct the first comprehensive dynamical model for the high-quality subset of stellar kinematics of the Milky Way disc, with full 6D phase-space coordinates, provided by the Gaia Data Release 2. We adopt an axisymmetric approximation…

Astrophysics of Galaxies · Physics 2020-04-24 Maria Selina Nitschai , Michele Cappellari , Nadine Neumayer

The motion of the baryonic components of the Milky Way is governed by both luminous and dark matter content of the Galaxy. Thus, the dynamics of the Milky Way globular clusters can be used as tracers to infer the mass model of the Galaxy up…

Astrophysics of Galaxies · Physics 2021-12-15 Saikat Das , Nirupam Roy

Using observational data on the kinematical properties and density distributions of the subsystems of the Milky Way galaxy, we construct a set of multi-component equilibrium models of its disk. The dynamics of the disk is studied…

Astrophysics of Galaxies · Physics 2019-12-17 V. I. Korchagin , S. S. Khrapov , A. V. Khoperskov

We have identified 274 M-type Brown Dwarfs in the Hubble Space Telescope's Wide Field Camera 3 (WFC3) pure parallel fields from the Brightest of Reionizing Galaxies (BoRG) survey for high redshift galaxies. These are near-infrared…

Astrophysics of Galaxies · Physics 2016-03-23 Isabel van Vledder , Dieuwertje van der Vlugt , B. W. Holwerda , M. A. Kenworthy , R. J. Bouwens , M. Trenti

In this paper we model the vertical structure of mass distribution of the Milky Way galaxy in the framework of a finite-width global disk model. Assuming the Galactic rotation curve only, we test inside the solar orbit the predictions of…

Astrophysics of Galaxies · Physics 2014-06-23 Joanna Jałocha , Szymon Sikora , Łukasz Bratek , Marek Kutschera

We present a simple technique to estimate mass-to-light (M/L) ratios of stellar populations based on two broadband photometry measurements, i.e. a color-M/L relation. We apply the color-M/L relation to galaxy rotation curves, using a large…

Astrophysics · Physics 2007-05-23 Roelof S. de Jong , Susan Kassin , Eric F. Bell , Stephane Courteau

We perform high-resolution simulations of a MW-like galaxy in a self-interacting cold dark matter model with elastic cross section over mass of $1~\rm cm^2/g$ (SIDM) and compare to a model without self-interactions (CDM). We run our…

Astrophysics of Galaxies · Physics 2019-09-25 Victor H. Robles , Tyler Kelley , James S. Bullock , Manoj Kaplinghat
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