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Related papers: Updated Kinematic Constraints on a Dark Disk

200 papers

We present a new method to construct fully self-consistent equilibrium models of multi-component disc galaxies similar to the Milky Way. We define distribution functions for the stellar disc and dark halo that depend on phase space position…

Astrophysics of Galaxies · Physics 2015-07-03 T. Piffl , Z. Penoyre , J. Binney

We study the evolution of Milky Way thick and thin discs in the light of the most recent observational data. In particular, we analyze abundance gradients of O, N, Fe and Mg along the thin disc as well as the [Mg/Fe] vs. [Fe/H] relations…

Astrophysics of Galaxies · Physics 2020-09-10 Marco Palla , Francesca Matteucci , Emanuele Spitoni , Fiorenzo Vincenzo , Valeria Grisoni

We present a detailed analysis for a subset of the high resolution (~35 mas, or 5 au) ALMA observations from the Disk Substructures at High Angular Resolution Project (DSHARP) to search for faint 1.3 mm continuum emission associated with…

We use the number density distributions of K and M dwarf stars with vertical height from the Galactic disk, determined using observations from the Sloan Digital Sky Survey, to probe the structure of the Milky Way disk across the survey's…

Astrophysics of Galaxies · Physics 2017-08-02 Deborah Ferguson , Susan Gardner , Brian Yanny

In an effort to more precisely define the spatial distribution of Galactic field stars, we present an analysis of the photometric parallaxes of 70,000 stars covering nearly 15 square degrees in seven Kapteyn Selected Areas. We address the…

Astrophysics · Physics 2009-11-07 M. H. Siegel , S. R. Majewski , I. N. Reid , I. B. Thompson

We present new high angular resolution near-infrared spectroscopic observations of the nuclear star cluster surrounding the Milky Way's central supermassive black hole. Using the integral-field spectrograph OSIRIS on Keck II behind the…

Solar and Stellar Astrophysics · Physics 2015-06-12 Tuan Do , Jessica R. Lu , Andrea M. Ghez , Mark R. Morris , Sylvana Yelda , Gregory D. Martinez , Shelley A. Wright , Keith Matthews

We present a new dust extinction technique with which we are able to retrieve parsec-scale gas surface density maps for entire nearby galaxies. The method measures the dust attenuation in optical bands on a pixel-by-pixel basis against a…

Following on from the second release of calibrated photometry from IPHAS, the INT/WFC Photometric H-alpha Survey of the Northern Galactic Plane, we present incompleteness-corrected stellar density maps in the r and i photometric bands.…

Astrophysics of Galaxies · Physics 2016-01-27 H. J. Farnhill , J. E. Drew , G. Barentsen , E. A. González-Solares

We investigate, using the Gaia-ESO Survey internal Data-Release 2, the properties of the double sequence of the Milky Way discs (defined chemically as the high-alpha and low-alpha populations), and discuss their compatibility with discs…

Cold interstellar gas systems have been used to constrain dark matter (DM) models by the condition that the heating rate from DM must be lower than the astrophysical cooling rate of the gas. Following the methodology of Wadekar and Farrar…

High Energy Physics - Phenomenology · Physics 2023-04-07 Digvijay Wadekar , Zihui Wang

This is the third paper in a series in which we attempt to put constraints on the flattening of dark halos in disk galaxies. For this purpose we need to analyse the observed XV diagrams in edge-on galaxies to accurately measure the radial…

Astrophysics of Galaxies · Physics 2015-05-18 J. C. O'Brien , K. C. Freeman , P. C. van der Kruit

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

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

In LambdaCDM, massive satellites are dragged into the disk-plane by dynamical friction where they dissolve into a stellar thick disk and a more massive dark matter disk. The distinctive kinematics of the dark disk matches the stars that…

Astrophysics · Physics 2009-06-23 T. Bruch , J. Read , L. Baudis , G. Lake

We present a new systematic way of setting up galactic gas disks based on the assumption of detailed hydrodynamic equilibrium. To do this, we need to specify the density distribution and the velocity field which supports the disk. We first…

Astrophysics of Galaxies · Physics 2015-05-18 Hsiang-Hsu Wang , Ralf S. Klessen , Cornelis P. Dullemond , Frank C. van den Bosch , Burkhard Fuchs

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 method for fitting parametrized mass models of the Milky Way to observational constraints. We take a Bayesian approach which allows us to take into account input from photometric and kinematic data, and expectations from…

Astrophysics of Galaxies · Physics 2015-05-27 Paul J. McMillan

We model the ALMA and VLA millimeter radial profiles of the disk around HL Tau to constrain the properties of the dust grains. We adopt the disk evolutionary models of Lynden-Bell \& Pringle and calculate their temperature and density…

Solar and Stellar Astrophysics · Physics 2020-01-08 Carlos Tapia , Susana Lizano , Anibal Sierra , Carlos Carrasco-González , Elly Bayona-Bobadilla

The Gaia mission has provided the largest ever astrometric chart of the Milky Way. Using it to map the Galactic halo is helpful for disentangling its merger history. The identification of halo stars in Gaia DR2 with reliable distance…

Astrophysics of Galaxies · Physics 2021-11-25 Helmer H. Koppelman , Amina Helmi

Our position inside the Galactic disc had prevented us from establishing an accurate rotation curve, until the advent of Gaia, whose third data release (Gaia DR3) made it possible to specify it up to twice the optical radius. We aim to…

Astrophysics of Galaxies · Physics 2023-11-01 Yongjun Jiao , Francois Hammer , Haifeng Wang , Jianling Wang , Philippe Amram , Laurent Chemin , Yanbin Yang