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We present a list of 109 pulsars with independent distance information compiled from the literature. Since the compilation of Frail & Weisberg, there are 35 pulsars with new distance estimate and 25 pulsars for which the distance or…

Astrophysics · Physics 2009-11-06 Gilberto C. Gomez , Robert A. Benjamin , Donald P. Cox

We present a new model for the distribution of free electrons in the Galaxy, the Magellanic Clouds and the intergalactic medium (IGM) that can be used to estimate distances to real or simulated pulsars and fast radio bursts (FRBs) based on…

Astrophysics of Galaxies · Physics 2017-01-25 J. M. Yao , R. N. Manchester , N. Wang

We present a new model for the Galactic distribution of free electrons. It (a) describes the distribution of the free electrons responsible for pulsar dispersion measures and thus can be used for estimating the distances to pulsars; (b)…

Astrophysics · Physics 2009-09-29 J. M. Cordes , T. J. W. Lazio

Pulsar dispersion measures (DMs) have been used to model the electron density of the interstellar medium (ISM) in the Galactic disk as a plane-parallel medium, despite significant scatter in the DM-distance distribution and strong evidence…

Astrophysics of Galaxies · Physics 2020-07-10 Stella Koch Ocker , James M. Cordes , Shami Chatterjee

Free electrons in the Galactic interstellar medium (ISM) disperse and scatter coherent radio waves, by amounts that depend on the distance to the radio source. Models of the Galactic electron density are thus widely used to predict…

Astrophysics of Galaxies · Physics 2026-05-12 S. K. Ocker , J. M. Cordes

In this work, two new axisymmetric models for the Galactic mass distribution are presented. Motivated by recent results, these two models include the contribution of a stellar thin disc and of a thick disc, as massive as the thin…

Astrophysics of Galaxies · Physics 2017-02-01 Ektoras Pouliasis , Paola Di Matteo , Misha Haywood

The combination of dispersion measures of pulsars, distances from the model of Cordes and Lazio (2002) and emission measures from the WHAM survey enabled a statistical study of electron densities and filling factors of the diffuse ionized…

Astrophysics · Physics 2009-11-11 E. M. Berkhuijsen , D. Mitra , P. Mueller

In Paper I we present a new model for the Galactic distribution of free electrons. In this paper we describe the input data and methodology for determining the structure and parameters of the model. Tables of the input data are provided and…

Astrophysics · Physics 2007-05-23 J. M. Cordes , T. J. W. Lazio

Galactic electron density distribution models are crucial tools for estimating the impact of the ionised interstellar medium on the impulsive signals from radio pulsars and fast radio bursts. The two prevailing Galactic electron density…

Astrophysics of Galaxies · Physics 2021-08-18 Danny C. Price , Adam Deller , Chris Flynn

The data obtained by the recent modern sky surveys enable detailed studies of the stellar distribution in the multi-dimensional space spanned by spatial coordinates, velocity and metallicity, from the solar neighborhood all the way out to…

Astrophysics · Physics 2009-11-13 S. Loebman , R. Roskar , Z. Ivezic

Using a new algorithm for estimating the actions of orbits a parametrised distribution function is automatically fitted to observational data for the solar neighbourhood. We adopt a gravitational potential that is generated by three discs…

Astrophysics of Galaxies · Physics 2015-06-05 James Binney

We present a new joint analysis of pulsar dispersion measures and diffuse H-alpha emission in the Milky Way, which we use to derive the density, pressure and filling factor of the thick disk component of the warm ionised medium (WIM) as a…

Astrophysics · Physics 2009-11-13 B. M. Gaensler , G. J. Madsen , S. Chatterjee , S. A. Mao

We introduce a new technique to constrain the line-of-sight integrated electron density of our Galactic halo $\text{DM}_\text{MW,halo}$ through analysis of the observed dispersion measure distributions of pulsars $\text{DM}_\text{pulsar}$…

Astrophysics of Galaxies · Physics 2020-06-09 E. Platts , J. Xavier Prochaska , Casey J. Law

We present detailed three-dimensional modelling of the stellar luminosity distribution for the disks of 31 relatively nearby (<= 110 Mpc) edge-on spiral galaxies. In contrast to most of the standard methods available in the literature we…

Astrophysics · Physics 2009-10-31 M. Pohlen , R. -J. Dettmar , R. Luetticke , U. Schwarzkopf

We test competing models that aim at explaining the nature of stars in the Milky Way that are well away (|z|$\gtrsim$ 1kpc) from the midplane, the so-called thick disk: the stars may have gotten there through orbital migration, through…

Astrophysics of Galaxies · Physics 2015-05-19 Marion Dierickx , Rainer J. Klement , Hans-Walter Rix , Chao Liu

Ever since a thick disk was proposed to explain the vertical distribution of the Milky Way disk stars, its origin has been a recurrent question. We aim to answer this question by inspecting 19 disk galaxies with stellar mass greater than…

We present accurate models of the gravitational potential produced by a radially exponential disk mass distribution. The models are produced by combining three separate Miyamoto-Nagai disks. Such models have been used previously to model…

Astrophysics of Galaxies · Physics 2015-02-10 Rory Smith , Chris Flynn , Graeme N. Candlish , Michael Fellhauer , Brad K. Gibson

Analytic distribution functions (DFs) for the Galactic disc are discussed. The DFs depend on action variables and their predictions for observable quantities are explored under the assumption that the motion perpendicular to the Galactic…

Astrophysics of Galaxies · Physics 2015-05-14 James Binney

How many low-mass stars, brown dwarfs and free-floating planets are in the Milky Way? And how are they distributed in our Galaxy? Recent studies of Milky Way interlopers in high-redshift observations have revealed a 150-300 pc thick disk of…

Astrophysics of Galaxies · Physics 2023-06-27 Benne Holwerda , Nor Pirzkal , Adam Burgasser , Chih-Chun Hsu

With a sample of 48,161 K giant stars selected from the LAMOST DR 2 catalogue, we construct torus models in a large volume extending, for the first time, from the solar vicinity to a Galactocentric distance of $\sim 20$ kpc, reaching the…

Astrophysics of Galaxies · Physics 2017-07-26 Qiao Wang , Yougang Wang , Chao Liu , Shude Mao , R. J. Long
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