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Related papers: Estimating the local dark matter density in a non-…

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I review current efforts to measure the mean density of dark matter near the Sun. This encodes valuable dynamical information about our Galaxy and is also of great importance for 'direct detection' dark matter experiments. I discuss…

Astrophysics of Galaxies · Physics 2014-06-16 J. I. Read

Predicting the local flux of dark matter particles is vital for dark matter direct detection experiments. To date, such predictions have been based on simulations that model the dark matter alone. Here we include the influence of the…

Astrophysics of Galaxies · Physics 2015-05-13 J. I. Read , V. Debattista , O. Agertz , L. Mayer , A. M. Brooks , F. Governato , G. Lake

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

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

Making robust predictions for the phase space distribution of dark matter at the solar neighbourhood is vital for dark matter direct detection experiments. To date, almost all such predictions have been based on simulations that model the…

Astrophysics of Galaxies · Physics 2015-05-13 J. I. Read , L. Mayer , A. M. Brooks , F. Governato , G. Lake

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

A precise determination of the local dark matter density and an accurate control over the corresponding uncertainties are of paramount importance for Dark Matter (DM) searches. Using very recent high-resolution numerical simulations of a…

High Energy Astrophysical Phenomena · Physics 2014-11-21 Miguel Pato , Oscar Agertz , Gianfranco Bertone , Ben Moore , Romain Teyssier

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…

An accurate knowledge of the dark matter distribution in the Milky Way is of crucial importance for galaxy formation studies and current searches for particle dark matter. In this paper we set new dynamical constraints on the Galactic dark…

Astrophysics of Galaxies · Physics 2015-12-03 Miguel Pato , Fabio Iocco , Gianfranco Bertone

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

Massive satellite accretions onto early galactic disks can lead to the deposition of dark matter in disk-like configurations that co-rotate with the galaxy. This phenomenon has potentially dramatic consequences for dark matter detection…

Astrophysics of Galaxies · Physics 2011-02-11 Chris W. Purcell , James S. Bullock , Manoj Kaplinghat

Using three-dimensional stellar kinematic data from simulated galaxies, we examine the efficacy of a Jeans equation analysis in reconstructing the total disk surface density, including the dark matter, at the "Solar" radius. Our simulation…

Astrophysics of Galaxies · Physics 2016-01-18 G. N. Candlish , R. Smith , C. Moni Bidin , B. K. Gibson

Several works have recently applied Jeans modelling to Gaia-based datasets to infer the circular velocity curve for the Milky Way. Such works have consistently found evidence for a continuous decline in the rotation curve beyond $\sim$15kpc…

Astrophysics of Galaxies · Physics 2024-12-04 Orlin Koop , Teresa Antoja , Amina Helmi , Thomas M. Callingham , Chervin F. P. Laporte

We for the first time provide self-consistent axisymmetric phase-space distribution models for the Milky Way's dark matter (DM) halo which are carefully matched against the latest kinematic measurements through Bayesian analysis. By using…

Astrophysics of Galaxies · Physics 2021-01-04 Mihael Petac

We investigate the presence and importance of dark matter discs in a sample of 24 simulated Milky Way galaxies in the APOSTLE project, part of the EAGLE programme of hydrodynamic simulations in Lambda-CDM cosmology. It has been suggested…

Astrophysics of Galaxies · Physics 2016-07-12 Matthieu Schaller , Carlos S. Frenk , Azadeh Fattahi , Julio F. Navarro , Kyle A. Oman , Till Sawala

We explore the density profile, shape, and virial mass of the Milky Way's dark matter halo using K giants (KG) from LAMOST and SDSS/SEGUE, as well as blue horizontal branch (BHB) stars from SDSS. Incorporating Gaia DR3 proper motions, we…

Astrophysics of Galaxies · Physics 2025-05-15 Lan Zhang , Xiang-Xiang Xue , Ling Zhu , Ruizhi Zhang , Chengqun Yang , Shi Shao , Jiang Chang , Feilu Wang , Hao Tian , Gang Zhao , Chao Liu

The spherical Jeans equation is a widely used tool for dynamical study of gravitating systems in astronomy. Here we test its efficacy in robustly weighing the mass of Milky Way analogues, given they need not be in equilibrium or even…

Astrophysics of Galaxies · Physics 2018-01-31 Prajwal R. Kafle , Sanjib Sharma , Aaron S. G. Robotham , Pascal J. Elahi , Simon P. Driver

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

Recent measurements of the Milky Way rotation curve found a sharp decline at around $15$-$20$ kpc from the center of the Galaxy, suggesting that the Galactic dark matter halo is much less massive than predicted by other dynamical tracers.…

Astrophysics of Galaxies · Physics 2025-03-11 Xiaowei Ou , Lina Necib , Andrew Wetzel , Anna Frebel , Jeremy Bailin , Micah Oeur

Dynamical estimates of the mass surface density at the solar radius can be made up to a height of 4 kpc using thick disk stars as tracers of the potential. We investigate why different Jeans estimators of the local surface density lead to…

Astrophysics of Galaxies · Physics 2016-01-27 F. J. Sanchez-Salcedo , C. Flynn , J. A. de Diego
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