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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…

星系天体物理 · 物理学 2026-05-12 S. K. Ocker , J. M. Cordes

Observational study on near-infrared (IR) scattering properties of interstellar dust grains has been limited due to its faintness. Using all-sky maps obtained from Diffuse Infrared Background Experiment (DIRBE), we investigate the…

星系天体物理 · 物理学 2016-03-28 K. Sano , S. Matsuura , K. Tsumura , T. Arai , M. Shirahata , Y. Onishi

Fermi-LAT observations of the Galactic Center (GC) have revealed a spherically- symmetric excess of GeV gamma rays extending to at least 10 deg from the dynamical center of the Galaxy. A critical uncertainty in extracting the intensity,…

高能天体物理现象 · 物理学 2016-09-14 Eric Carlson , Tim Linden , Stefano Profumo

In this paper we test 8 models of the free electron distribution in the Milky Way that have been published previously, and we introduce 4 additional models that explore the parameter space of possible models further. These new models…

星系天体物理 · 物理学 2015-06-11 D. H. F. M. Schnitzeler

The scatter (${\rm\sigma_{\text{sSFR}}}$) of the specific star formation rates (sSFRs) of galaxies is a measure of the diversity in their star formation histories (SFHs) at a given mass. In this paper we employ the EAGLE simulations to…

The spectral data on the diffuse Galactic gamma-rays, at medium and high latitudes (|b| > 10) and energies of 1-100 GeV, recently published by the Fermi Collaboration are used to produce a novel study on the gamma-ray emissivity in the…

高能天体物理现象 · 物理学 2011-10-28 Maryam Tavakoli , Ilias Cholis , Carmelo Evoli , Piero Ullio

In this work we characterize the distribution of Dark Matter (DM) in the Milky Way (MW), and its uncertainties, adopting the well known "Rotation Curve" method. We perform a full marginalization over the uncertainties of the Galactic…

星系天体物理 · 物理学 2019-06-12 Maria Benito , Alessandro Cuoco , Fabio Iocco

Reliable identification of the origin of the high-energy non-thermal emission from the Galactic Center (GC) is not achievable without adequate consideration of the ambient conditions such as the magnetic field configuration or gas…

星系天体物理 · 物理学 2019-09-19 Mehmet Guenduez , Julia Becker Tjus , Katia Ferrière , Ralf-Jürgen Dettmar , Dominik J. Bomans

We perform a systematic Bayesian analysis of rotation vs. dispersion support ($v_{\rm rot} / \sigma$) in $40$ dwarf galaxies throughout the Local Volume (LV) over a stellar mass range $10^{3.5} M_{\rm \odot} < M_{\star} < 10^8 M_{\rm…

We present an analysis of the mass distribution in the region of the Galactic bulge, which leads to constraints on the total amount and distribution of Dark Matter (DM) therein. Our results -based on the dynamical measurement of the BRAVA…

星系天体物理 · 物理学 2017-04-21 Fabio Iocco , Maria Benito

We simulate the neutrino and $\gamma$-ray emissions of the Galaxy which are originated from the hadronic scattering of cosmic rays (CR) with the interstellar medium (ISM). Rather than assuming a uniform CR density, we estimate the spatial…

天体物理学 · 物理学 2010-10-27 Carmelo Evoli , Dario Grasso , Luca Maccione

We present the Galactic model parameters for thin disc estimated by Sloan Digital Sky Survey (SDSS) data of 14 940 stars with apparent magnitudes $16<g_{o}\leq21$ in six intermediate latitude fields in the first Galactic quadrant.…

天体物理学 · 物理学 2009-11-11 S. Bilir , S. Karaali , S. Ak , E. Yaz , E. Hamzaoglu

We examine the proposal that the dispersion measures (DMs) and Faraday rotation measures (RMs) of extragalactic linearly-polarized fast radio bursts (FRBs) can be used to probe the intergalactic magnetic field (IGMF) in filaments of…

宇宙学与河外天体物理 · 物理学 2016-06-29 Takuya Akahori , Dongsu Ryu , B. M. Gaensler

Using a new, expanded compilation of extragalactic source Faraday rotation measures (RM) we investigate the broad underlying magnetic structure of the Galactic disk at latitudes $|b|$ $\lesssim 15^{\circ}$ over all longitudes $l$, where our…

星系天体物理 · 物理学 2015-05-14 Philipp P. Kronberg , Katherine J. Newton-McGee

Radio recombination lines (RRLs) can be used to determine the emission measure unambiguously along the Galactic plane. We use the deep (2100s per beam) HI Parkes Zone of Avoidance survey which includes 3 RRLs (H$166\alpha$, H$167\alpha$ and…

We develop a framework for a new definition of the Galactic midplane, allowing for tilt (rotation about Galactic azimuth 90deg.), and roll (rotation about Galactic azimuth 0deg.) of the midplane with respect to the current definition.…

星系天体物理 · 物理学 2019-09-11 L. D. Anderson , Trey V. Wenger , W. P. Armentrout , Dana S. Balser , T. M. Bania

Abridged: We have used the well-selected sample of ~1750 embedded, young, massive stars identified by the RMS survey to investigate the Galactic distribution of recent massive star formation. We describe the various methods used to assign…

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…

天体物理学 · 物理学 2009-11-06 Gilberto C. Gomez , Robert A. Benjamin , Donald P. Cox

A new, much improved model of the Galactic Magnetic Field (GMF) is presented. We use the WMAP7 Galactic Synchrotron Emission map and more than forty thousand extragalactic rotation measures to constrain the parameters of the GMF model,…

星系天体物理 · 物理学 2015-06-04 Ronnie Jansson , Glennys R. Farrar

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…

天体物理学 · 物理学 2007-05-23 J. M. Cordes , T. J. W. Lazio