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Motivated by a recently found interesting property of the dark halo surface density within a radius, $r_{\rm max}$, giving the maximum circular velocity, $V_{\rm max}$, we investigate it for dark halos of the Milky Way's and Andromeda's…

Astrophysics of Galaxies · Physics 2017-07-26 Kohei Hayashi , Tomoaki Ishiyama , Go Ogiya , Masashi Chiba , Shigeki Inoue , Masao Mori

The structure, extent, and mass of the Milky Way's (MW) dark matter (DM) halo are observationally challenging to determine due to our position within the Galaxy. To overcome this limitation, we study a combined sample of 127 MW analogs from…

It was recently discovered that the mean dark matter surface density within one dark halo scale length - the radius within which the volume density profile of dark matter remains approximately flat - is constant across a wide range of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Gianfranco Gentile , Benoit Famaey , HongSheng Zhao , Paolo Salucci

We study the formation histories and present-day structure of satellite galaxies formed in a high resolution hydrodynamic simulation of a Milky Way-like galaxy. The simulated satellites span nearly 4 orders of magnitude in luminosity but…

Cosmology and Nongalactic Astrophysics · Physics 2009-10-06 Takashi Okamoto , Carlos S. Frenk

Numerous observations have shown that the dark matter halo surface density, defined as the product of core radius and halo central density of cored dark matter haloes is nearly constant and independent of galaxy mass over a whole slew of…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-10 Sujit K. Dalui , Shantanu Desai

We consider dark masses measured from kinematic tracers at discrete radii in galaxies for which baryonic contributions to overall potentials are either subtracted or negligible. Recent work indicates that rotation curves due to dark matter…

Astrophysics of Galaxies · Physics 2015-05-18 Matthew G. Walker , Stacy S. McGaugh , Mario Mateo , Edward Olszewski , Rachel Kuzio de Naray

We use a hybrid approach that combines high-resolution simulations of the formation of a Milky Way-like halo with a semi-analytic model of galaxy formation to study the mass content of dwarf galaxies in the concordance $\Lambda$CDM…

Astrophysics · Physics 2009-06-16 Yang-Shyang Li , Amina Helmi , Gabriella De Lucia , Felix Stoehr

In this paper, in the framework of the secondary infall model, the correlation between the central surface density and the halo core radius of galaxy, and cluster of galaxies, dark matter haloes was analyzed, this having recently been…

Cosmology and Nongalactic Astrophysics · Physics 2014-02-04 A. Del Popolo , V. Cardone , G. Belvedere

The mass distribution of the Galactic disk is constructed from the terminal velocity curve and the mass discrepancy-acceleration relation. Mass models numerically quantifying the detailed surface density profiles are tabulated. For $R_0 =…

Astrophysics of Galaxies · Physics 2016-01-13 Stacy S. McGaugh

The cold dark matter (CDM) model has two unsolved issues: simulations overpredict the satellite abundance around the Milky Way (MW) and it disagrees with observations of the central densities of dwarf galaxies which prefer constant density…

Astrophysics of Galaxies · Physics 2015-09-10 Victor H. Robles , V. Lora , T. Matos , F. J. Sanchez-Salcedo

We investigate the claim that the largest subhaloes in high resolution dissipationless cold dark matter (CDM) simulations of the Milky Way are dynamically inconsistent with observations of its most luminous satellites. We find that the…

Cosmology and Nongalactic Astrophysics · Physics 2014-01-20 E. Polisensky , M. Ricotti

We test the luminosity function of Milky Way satellites as a constraint for the nature of Dark Matter particles. We perform dissipationless high-resolution N-body simulations of the evolution of Galaxy-sized halo in the standard Cold Dark…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Andrea V. Maccio' , Fabio Fontanot

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

We provide new constraints on the dark matter halo density profile of Milky Way (MW) dwarf spheroidal galaxies (dSphs) using the phase-space distribution function (DF) method. After assessing the systematics of the approach against mock…

Astrophysics of Galaxies · Physics 2024-05-31 Kevin E. Andrade , Manoj Kaplinghat , Mauro Valli

We investigate the growth histories of dark matter halos associated with dwarf satellites in Local Group galaxies and the resultant evolution of the baryonic component. Our model is based on the recently proposed property that the mean…

Astrophysics of Galaxies · Physics 2016-08-17 Yusuke Okayasu , Masashi Chiba

We present new measurements of the abundance of galaxies with a given circular velocity in the Local Volume: a region centered on the Milky Way Galaxy and extending to distance 10Mpc. The sample of 750 mostly dwarf galaxies provides a…

Cosmology and Nongalactic Astrophysics · Physics 2016-02-05 Anatoly Klypin , Igor Karachentsev , Dmitry Makarov , Olga Nasonova

Despite the fact that the mean matter density of the universe has been measured to an accuracy of a few percent within the standard $\Lambda$CDM paradigm, its median density is not known even to order of magnitude. Typical points lie in…

Cosmology and Nongalactic Astrophysics · Physics 2018-04-11 Jens Stücker , Philipp Busch , Simon D. M. White

The rotation curve, the total mass and the gravitational potential of the Galaxy are sensitive measurements of the dark matter halo profile. In this publication cuspy and cored DM halo profiles are analysed with respect to recent…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-30 Markus Weber , Wim de Boer

Using the model for (bottom-up) hierarchical halo growth recently developed by Salvador-Sol\'e et al. (2012), we derive the typical spherically averaged density profile for haloes with several relevant masses in the concordant warm dark…

Cosmology and Nongalactic Astrophysics · Physics 2012-07-10 Jordi Viñas , Eduard Salvador-Solé , Alberto Manrique
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