English
Related papers

Related papers: The Local Dark Matter Density from SDSS-SEGUE G-dw…

200 papers

Measurement of the local dark matter density plays an important role in both Galactic dynamics and dark matter direct detection experiments. However, the estimated values from previous works are far from agreeing with each other. In this…

Astrophysics of Galaxies · Physics 2016-03-23 Qiran Xia , Chao Liu , Shude Mao , Yingyi Song , Lan Zhang , R. J. Long , Yong Zhang , Yonghui Hou , Yuefei Wang , Yue Wu

We present a new method for determining the local dark matter density using kinematic data for a population of tracer stars. The Jeans equation in the $z$-direction is integrated to yield an equation that gives the velocity dispersion as a…

Astrophysics of Galaxies · Physics 2016-05-10 Hamish Silverwood , Sofia Sivertsson , Pascal Steger , Justin I. Read , Gianfranco Bertone

We apply the vertical Jeans equation to the kinematics of Milky Way stars in the solar neighbourhood to measure the local dark matter density. More than 90,000 G- and K-type dwarf stars are selected from the cross-matched sample of LAMOST…

Astrophysics of Galaxies · Physics 2020-06-10 Rui Guo , Chao Liu , Shude Mao , Xiang-Xiang Xue , R. J. Long , Lan Zhang

We apply a new method to determine the local disc matter and dark halo matter density to kinematic and position data for \sim2000 K dwarf stars taken from the literature. Our method assumes only that the disc is locally in dynamical…

Astrophysics of Galaxies · Physics 2012-08-28 Silvia Garbari , Chao Liu , Justin I. Read , George Lake

The local dark matter density provides constraints on dark matter models and is of importance for experiments hoping to detect dark matter particles in the laboratory. The advent of extensive survey data calls for more complex physical…

Astrophysics of Galaxies · Physics 2025-10-07 Laurin Söding , Ruben L. Bartel , Philipp Mertsch

The analysis of the vertical velocity dispersion of disc stars is the most direct astronomical means of estimating the local dark matter density, $\rho_{DM}$. Current estimates based on the mid-plane dynamic density use a local baryonic…

Astrophysics of Galaxies · Physics 2015-08-06 Frederic V. Hessman

We revisit systematics in determining the local dark matter density (rho_dm) from the vertical motion of stars in the Solar Neighbourhood. Using a simulation of a Milky Way-like galaxy, we determine the data-quality required to detect the…

Astrophysics of Galaxies · Physics 2011-08-29 Silvia Garbari , Justin I. Read , George Lake

The density of dark matter near the Sun is important for experiments hunting for dark matter particles in the laboratory, and for constraining the local shape of the Milky Way's dark matter halo. Estimates to date have typically assumed…

Astrophysics of Galaxies · Physics 2022-02-16 S. Sivertsson , J. I. Read , H. Silverwood , P. F. de Salas , K. Malhan , A. Widmark , C. F. P. Laporte , S. Garbari , K. Freese

The distribution of dark matter in dwarf galaxies can have important implications on our understanding of galaxy formation as well as the particle physics properties of dark matter. However, accurately characterizing the dark matter content…

Cosmology and Nongalactic Astrophysics · Physics 2021-09-01 Laura J. Chang , Lina Necib

The spherical Jeans equation is commonly used to infer dark matter distributions in dwarf spheroidal satellites of the Milky Way to constrain the nature of dark matter. One of its assumptions is that of dynamical equilibrium while the…

Astrophysics of Galaxies · Physics 2026-03-18 Kristian Tchiorniy , Anna Genina

We study the systematic problems in determining the local dark matter density $\rho_{dm}(R_\odot)$ from kinematics of stars in the Solar Neighbourhood, using a simulated Milky Way-like galaxy. We introduce a new unbiased method for…

Astrophysics of Galaxies · Physics 2012-02-09 Silvia Garbari , Justin I. Read , George Lake

This report summarises progress made in estimating the local density of dark matter ($\rho_{\mathrm{DM,\odot}}$), a quantity that is especially important for dark matter direct detection experiments. We outline and compare the most common…

Astrophysics of Galaxies · Physics 2021-10-27 Pablo F. de Salas , Axel Widmark

We show that current microlensing and dynamical observations of the Galaxy permit to set interesting constraints on the Dark Matter local density and profile slope towards the galactic centre. Assuming state-of-the-art models for the…

Astrophysics of Galaxies · Physics 2011-11-18 Fabio Iocco , Miguel Pato , Gianfranco Bertone , Philippe Jetzer

We present mass models for the dark matter component of seven dwarf galaxies taken from "The HI Nearby Galaxy Survey" (THINGS) and compare these with those from numerical Lambda Cold Dark Matter (LCDM) simulations. The THINGS…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Se-Heon Oh , W. J. G. de Blok , Elias Brinks , Fabian Walter , Robert C. Kennicutt

The rotation curve of the Milky Way is commonly used to estimate the local dark matter density $\rho_{{\rm DM},\odot}$. However, the estimates are subject to the choice of the distribution of baryons needed in this type of studies. In this…

Astrophysics of Galaxies · Physics 2019-10-16 P. F. de Salas , K. Malhan , K. Freese , K. Hattori , M. Valluri

Dwarf galaxies are small, dark matter-dominated galaxies, some of which are embedded within the Milky Way. Their lack of baryonic matter (e.g., stars and gas) makes them perfect test beds for probing the properties of dark matter --…

Cosmology and Nongalactic Astrophysics · Physics 2023-02-22 Tri Nguyen , Siddharth Mishra-Sharma , Reuel Williams , Lina Necib

Although still under debate, observations generally suggest that dwarf spheroidal (dSph) galaxies exhibit large constant-density cores in the centers, which can hardly be explained by dissipationless cold dark matter simulations without…

Astrophysics of Galaxies · Physics 2017-04-12 Shu-Rong Chen , Hsi-Yu Schive , Tzihong Chiueh

We search for evidence of dark matter in the Milky Way by utilizing the stellar number density distribution and kinematics measured by the Sloan Digital Sky Survey (SDSS) to heliocentric distances exceeding ~10 kpc. We employ the…

Even if dark matter particles are unambiguously discovered in experiments, there is no clear reason to expect that the dark matter problem has been solved. It is very easy to provide examples of dark matter scenarios (e.g. in supersymmetric…

Astrophysics · Physics 2011-09-13 Jacob L. Bourjaily

The predicted size of dark matter substructures in kilo-parsec scales is model-dependent. Therefore, if the correlations between dark matter mass densities as a function of the distances between them are measured via observations, we can…

Astrophysics of Galaxies · Physics 2022-08-02 Ahmad Borzou
‹ Prev 1 2 3 10 Next ›