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The Synchrotron Emission Pattern of Intrabinary Shocks
An, Hongjun; Romani, Roger W.; Kandel, D.
We model millisecond pulsar winds colliding with radiatively driven companion winds in black widow and redback systems. For the redbacks, the geometry of this intrabinary shock (IBS) is quite sensitive to the expected equatorial concentration in the pulsar outflow. We thus analytically extend IBS thin-shock models to ∼ {\sin }2nθ pulsar…
Signatures of Nonideal Plasma Evolution During Substorms Obtained by Mining Multimission Magnetometer Data
Merkin, V. G.; Sitnov, M. I.; Genestreti, K. J. +5 more
Substorm-type evolution of the Earth's magnetosphere is investigated by mining more than two decades (1995-2017) of spaceborne magnetometer data from multiple missions including the first two years (2016-2017) of the Magnetospheric MultiScale mission. This investigation reveals interesting features of plasma evolution distinct from ideal magnetohy…
TESS first look at evolved compact pulsators. Discovery and asteroseismic probing of the g-mode hot B subdwarf pulsator EC 21494-7018
Geier, S.; Hermes, J. J.; Kawaler, S. D. +29 more
Context. The TESS satellite was launched in 2018 to perform high-precision photometry from space over almost the whole sky in a search for exoplanets orbiting bright stars. This instrument has opened new opportunities to study variable hot subdwarfs, white dwarfs, and related compact objects. Targets of interest include white dwarf and hot subdwar…
CO multi-line imaging of nearby galaxies (COMING). IV. Overview of the project
Nakanishi, Hiroyuki; Seta, Masumichi; Salak, Dragan +36 more
Observations of the molecular gas in galaxies are vital to understand the evolution and star-forming histories of galaxies. However, galaxies with molecular gas maps of their whole discs at sufficient resolution to distinguish galactic structures are severely lacking. Millimeter-wavelength studies at a high angular resolution across multiple lines…
CHEERS Results from NGC 3393. III. Chandra X-Ray Spectroscopy of the Narrow Line Region
Elvis, Martin; Raymond, John; Risaliti, Guido +6 more
We present spatially resolved Chandra narrow-band imaging and imaging spectroscopy of NGC 3393. This galaxy hosts a Compton-thick Seyfert 2 active galactic nucleus (AGN) with sub-kpc bipolar outflows that are strongly interacting with the circumnuclear gas. We identify narrow-band excess emission associated with the Ne IX 0.905 keV transition (wit…
Inner dark matter distribution of the Cosmic Horseshoe (J1148+1930) with gravitational lensing and dynamics
Lewis, G. F.; Halkola, A.; Suyu, S. H. +4 more
We present a detailed analysis of the inner mass structure of the Cosmic Horseshoe (J1148+1930) strong gravitational lens system observed with the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3). In addition to the spectacular Einstein ring, this systems shows a radial arc. We obtained the redshift of the radial arc counterimage zs, r…
Heliospheric modulation of the interstellar dust flow on to Earth
Krüger, H.; Srama, R.; Grün, E. +3 more
Aims: Based on measurements by the Ulysses spacecraft and high-resolution modelling of the motion of interstellar dust (ISD) through the heliosphere we predict the ISD flow in the inner planetary system and on to the Earth. This is the third paper in a series of three about the flow and filtering of the ISD.
Methods: Micrometer- and sub-…
Exploring the Outskirts of Globular Clusters: The Peculiar Kinematics of NGC 3201
Famaey, B.; Ibata, R.; Bianchini, P.
The outskirts of globular clusters (GCs) simultaneously retain crucial information about their formation mechanism and the properties of their host galaxy. Thanks to the advent of precision astrometry both their morphological and kinematic properties are now accessible. Here we present the first dynamical study of the outskirts of the retrograde G…
Late-time Kilonova Light Curves and Implications to GW170817
Waxman, Eli; Ofek, Eran O.; Kushnir, Doron
We discuss the late-time (tens of days) emission from the radioactive ejecta of mergers involving neutron stars, when the ionization energy loss time of beta-decay electrons and positrons exceeds the expansion time. We show that if the e± are confined to the plasma (by magnetic fields), then the time dependence of the plasma heating rat…
Col-OSSOS: Color and Inclination Are Correlated throughout the Kuiper Belt
Wang, Shiang-Yu; Marsset, Michaël; Fraser, Wesley C. +12 more
Both physical and dynamical properties must be considered to constrain the origins of the dynamically excited distant solar system populations. We present high-precision (g-r) colors for 25 small (H r > 5) dynamically excited trans-Neptunian objects (TNOs) and centaurs acquired as part of the Colours of the Outer Solar System Origins…