Distances, Radial Distribution and Total Number of Galactic Supernova Remnants

Abstract

We present a table of 215 SNRs with distances. New distances are found to SNR G$51.26+0.11$ of $6.6\pm 1.7$ kpc using HI absorption spectra, and to 5 other SNRs using maser/molecular cloud associations. We recalculate the distances and errors to all SNRs using a consistent rotation curve and provide errors where they were not previously estimated. This results in a significant distance revisions for 20 SNRs. Because of observational constraints and selection effects, there to be is an apparent deficit of observed number of Galactic supernova remnants (SNRs). To investigate this, we employ two methods. The first method applies correction factors for the selection effects to derive the radial density distribution. The second method compares functional forms for the SNR surface density and selection function against the data to find which functions are consistent with the data. The total number of SNRs in the Galaxy is $\sim 3500$ (Method 1) or in the range $\sim 2400$ to $\sim 5600$ (Method 2). We conclude that the current observed number of SNRs is not yet complete enough to give a well-determined total SNR number or radial density function.

24 pages, 8 figures

References in corpus (43)

• The Structure of the Milky Way's Bar Outside the Bulge
• The Youngest Galactic Supernova Remnant: G1.9+0.3
• Resolution of the Distance Ambiguity for Galactic HII Regions
• Galactic Supernova Remnant Candidates Discovered by THOR
• On the Expansion Rate, Age, and Distance of the Supernova Remnant G266.2-1.2 (Vela Jr.)
• Discovery of the radio and X-ray counterpart of TeV Gamma-ray source HESS J1731-347
• The distance and neutral environment of the massive stellar cluster Westerlund 1
• DA495 - an aging pulsar wind nebula
• Radio Spectrum and Distance of the SNR HB9
• The HI/OH/Recombination line survey of the inner Milky Way (THOR): data release 2 and HI overview
• Discovery of New Interacting Supernova Remnants in the Inner Galaxy
• Discovery of an OB Runaway Star Inside SNR S147
• The Bar and Spiral Arms in the Milky Way: Structure and Kinematics
• A high resolution HI study towards the supernova remnant Puppis A and its environments
• G181.1+9.5, a new high-latitude low-surface brightness supernova remnant
• Are ultra-diffuse galaxies Milky Way-sized?
• The radio SNR G65.1+0.6 and its associated pulsar J1957+2831
• Discovery of a Highly Energetic X-ray Pulsar Powering HESS J1813-178 in the Young Supernova Remnant G12.82-0.02
• Abundances in the Ejecta of Core Collapse Supernova Remnants, G350.1-0.3 and G349.7+0.2
• Kinematics of the Galactic SNR G109.1-1.0 (CTB 109)
• New candidate radio supernova remnants detected in the GLEAM survey over $345^{\circ }<l<60^{\circ }$, $180^{\circ }<l<240^{\circ }$
• High resolution HI and radio continuum observations of the SNR G290.1-0.8
• G107.0+9.0: A New Large Optically Bright, Radio and X-Ray Faint Galactic Supernova Remnant in Cepheus
• Two Radio Supernova Remnants Discovered in the Outer Galaxy
• Discovery of A New Faint Radio SNR G108.2-0.6
• G315.1+2.7: a new Galactic SNR from the AAO/UKST HAlpha survey
• Interaction between the Supernova Remnant HB 3 and the Nearby Star-Forming Region W3
• Is HESS J1912+101 associated with an old Supernova Remnant?
• Radio Observations and Spectrum of the SNR G127.1+0.5 and its Central Source 0125+628
• Characteristics of supernova remnant G351.7+0.8 and a distance argument against its association with PSR J1721-3532
• The Distance Measurements of Supernova Remnants in The Fourth Galactic Quadrant
• The environment of supernova remnant VRO 42.05.01 as probed with IRAM 30m molecular line observations
• Discovery of a New X-ray Filled Radio Supernova Remnant Around the Pulsar Wind Nebula in 3EG J1809-2328
• XMM-Newton, Chandra, and CGPS observations of the Supernova Remnants G85.4+0.7 and G85.9-0.6
• Ionization age of iron ejecta in the Galactic Type Ia supernova remnant G306.3-0.9
• An XMM-Newton Study of the Mixed-Morphology Supernova Remnant G346.6-0.2
• Search for and Identification of Young Compact Galactic Supernova Remnants Using THOR
• Identification campaign of supernova remnant candidates in the Milky Way. II. X-ray studies of G38.7-1.4
• The radial supernova remnant distribution in the Galaxy
• New composite supernova remnant toward HESS J1844-030?
• The revised distance of supernova remnant G15.4+0.1
• XMM-Newton Studies of the Supernova Remnant G350.0$-$2.0
• Distance and Evolutionary States of Supernova Remnant G18.9-1.1 and Candidate G28.6+0.0

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• A Statistical Analysis of Galactic Radio Supernova Remnants
• A Study of GeV Gamma-ray Emission toward Supernova Remnant G51.26+0.11 and Its Molecular Environment
• Direct measurements of cosmic rays and their possible interpretations
• Metrewave Galactic Plane with the uGMRT (MeGaPluG) Survey: Lessons from the Pilot Study