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We present X-ray and radio observations of the new Galactic supernova remnant (SNR) G306.3-0.9, recently discovered by Swift. Chandra imaging reveals a complex morphology, dominated by a bright shock. The X-ray spectrum is broadly…

We carry out a comprehensive study of HI 21 cm line observations and $^{13}$CO line observations of 21 supernova remnants (SNRs). The aim of the study is to search for HI absorption features to obtain kinematic distances in a consistent…

Astrophysics of Galaxies · Physics 2018-08-29 S. Ranasinghe , D. A. Leahy

The properties of the - presumably - youngest Galactic supernova remnant (SNR) G1.9+0.3 are investigated within the framework of nonlinear kinetic theory of cosmic ray acceleration in SNRs. The observed angular size and expansion speed as…

High Energy Astrophysical Phenomena · Physics 2011-03-07 L. T. Ksenofontov , H. J. Voelk , E. G. Berezhko

In this paper we present the most up-to-date list of nearby galaxies with optically detected supernova remnants (SNRs). We discuss the contribution of the H{\alpha} flux from the SNRs to the total H{\alpha} flux and its influence on derived…

Astrophysics of Galaxies · Physics 2015-06-19 M. M. Vucetic , B. Arbutina , D. Urosevic

The X-ray emission from a supernova remnant (SNR) is a powerful diagnostic of the state of the shocked plasma. The temperature (kT) and the emission measure (EM) of the shocked-gas are related to the energy of the explosion, the age of the…

High Energy Astrophysical Phenomena · Physics 2020-05-21 D. A. Leahy , S. Ranasinghe. M. Gelowitz

We briefly reviewed some recent progress on the studies of supernova remnants (SNRs), including the radio SNRs (the structure, polarization, spectrum etc.), observational characteristics of X-ray emission, pulsar wind nebulae (PWNe),…

High Energy Astrophysical Phenomena · Physics 2009-09-03 Jian-Wen Xu

Intergalactic type-Ia supernovae (SNe-Ia) have been discovered recently in rich galaxy clusters, likely the descendants of an intergalactic stellar population found in recent years through a variety of tracers. We estimate the observational…

Astrophysics · Physics 2009-11-11 Dan Maoz , Eli Waxman , Abraham Loeb

The vast majority of Galactic supernova remnants (SNRs) were detected by their synchrotron radio emission. Recently, the evolved SNR G107.0+9.0 with a diameter of about 3~deg or 75~pc up to 100~pc in size was optically detected with an…

Astrophysics of Galaxies · Physics 2021-11-03 Wolfgang Reich , Xuyang Gao , Patricia Reich

Supernova remnants (SNRs) have been considered as the dominant contributors to Galactic cosmic rays. However, the relation between high-energy particles trapped in SNRs and cosmic rays observed at the Earth remains obscure. In this paper,…

High Energy Astrophysical Phenomena · Physics 2019-03-27 Houdun Zeng , Yuliang Xin , Siming Liu

The radio surface brightness-to-diameter ({\Sigma} - D) relation for supernova remnants (SNRs) in the starburst galaxy M82 is analyzed in a statistically more robust manner than in the previous studies that mainly discussed sample quality…

Cosmology and Nongalactic Astrophysics · Physics 2012-01-27 D. Urosevic , B. Vukotic , B. Arbutina , M. Sarevska

The study of supernova remnants (SNRs) is fundamental to understanding the chemical enrichment and magnetism in galaxies, including our own Milky Way. In an effort to understand the connection between the morphology of SNRs and the Galactic…

Astrophysics of Galaxies · Physics 2016-03-09 J. L. West , S. Safi-Harb , T. Jaffe , R. Kothes , T. L. Landecker , T. Foster

In this paper we discuss the radio continuum and X-ray properties of the so-far poorly studied Galactic supernova remnant (SNR) G5.9+3.1. We present the radio spectral energy distribution (SED) of the Galactic SNR G5.9+3.1 obtained with the…

Despite tantalizing evidence that supernova remnants (SNRs) are the source of Galactic cosmic rays (CRs), including the recent detection of a spectral signature of hadronic gamma-ray emission from two SNRs, their origin in aggregate remains…

High Energy Astrophysical Phenomena · Physics 2019-08-13 T. J. Brandt , F. Acero , F. de Palma , J. W. Hewitt , M. Renaud

We have searched for infrared emission from supernova remnants (SNRs) included in the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) field. At the positions of 100 known SNRs, we made 3.6, 4.5, 5.8, and 8.0 um…

Astrophysics · Physics 2015-06-24 Ho-Gyu Lee

We have detected a spatially resolved supernova remnant (SNR) in the center of the Andromeda Galaxy, in radio, X-ray, and optical wavelengths. These observations provide the highest spatial resolution imaging of a radio/X-ray/optical SNR in…

Astrophysics · Physics 2009-11-07 A. K. H. Kong , L. O. Sjouwerman , B. F. Williams , M. R. Garcia , J. R. Dickel

It has long been speculated that supernova remnants represent a major source of cosmic rays in the Galaxy. Observations over the past decade have ceremoniously unveiled direct evidence of particle acceleration in SNRs to energies…

Astrophysics · Physics 2009-06-23 Patrick Slane

We present far-infrared (FIR) spectroscopy of supernova remnants (SNRs) based on the archival data of the Infrared Space Observatory ($ISO$) taken with the Long Wavelength Spectrometer (LWS). Our sample includes previously unpublished…

Astrophysics of Galaxies · Physics 2021-11-24 Matthew J. Millard , Aravind P. Ravi , Jeonghee Rho , Sangwook Park

Galactic supernova remnants (SNRs) with angular dimensions greater than a few degrees are relatively rare, as are remnants located more than ten degrees off the Galactic plane. Here we report a UV and optical investigation of two previously…

In this paper, we present high-energy neutrino spectra from 21 Galactic supernova remnants (SNRs), derived from gamma-ray measurements in the GeV-TeV range. We find that only the strongest sources, i.e. G40.5-0.5 in the north and Vela…

Astrophysics of Galaxies · Physics 2015-06-12 Matthias Mandelartz , Julia Becker Tjus

We present an unbiased spectroscopic study of the Galactic supernova remnant (SNR) Cygnus Loop using the Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) DR5. LAMOST features both a large field of view and a large…

High Energy Astrophysical Phenomena · Physics 2020-04-21 Ji Yeon Seok , Bon-Chul Koo , Gang Zhao , John C. Raymond
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