Lawrence D. Green Responds

Green, Lawrence D.

doi:10.2307/376853

Cited by 13 publications

(20 citation statements)

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“…This paper presents the latest version of a catalogue of Galactic supernova remnants (SNRs) which I have compiled for several decades. Previous versions have been published in (Green 1984(Green , 1988(Green , 1991Stephenson & Green 2002;Green 2004Green , 2009Green , 2014. In addition, more detailed web-based versions of the catalogue have been produced since 1995 -most recently in 2017 -which either correspond to one of the published catalogues, or are an intermediate revision.…”

Section: Introductionmentioning

confidence: 99%

A revised catalogue of 294 Galactic supernova remnants

Green¹

2019

J Astrophys Astron

281

256

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A revised catalogue of Galactic supernova remnants (SNRs) is presented, along with some simple statistics of their properties. Six new SNRs have been added to the catalogue since the previous published version from 2014, and six entries have been removed, as they have been identified as H regions, leaving the number of entries in the catalogue at 294. Some simple statistics of the remnants in the catalogue, and the selection effects that apply, are discussed, along with some recently proposed Galactic SNR candidates.

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Section: Introductionmentioning

confidence: 99%

A revised catalogue of 294 Galactic supernova remnants

Green¹

2019

J Astrophys Astron

281

256

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“…A goal of the survey is to determine whether new emission mechanisms or changes in the radio emission mechanisms are detected in the microwave range. Therefore, for each target, the 1 GHz radio flux density (Green 2009) was used to extrapolate to microwave frequencies using a power law. The extrapolation illustrates the expected Planck flux densities, if synchrotron radiation is the sole source of emission and the high-energy particles have a power-law energy distribution.…”

Section: Results and Discussion Of Individual Objectsmentioning

confidence: 99%

“…(a) Flux densities at 1 GHz, radio spectral indices, and angular diameters are from Green (2009). For cases of unknown or stronglyspatially-variable spectral index, we put ".…”

Section: Notesmentioning

confidence: 99%

“…Mature: age likely greater than 10 5 yr. Type X: the supernova that produced this supernova remnant was of type X. size in the maps was taken to be the combination of the intrinsic source size from the Green catalogue (Green 2009), θ SNR in Table 2, and the Planck beam size, θ b in Table 1:…”

Section: Notesmentioning

confidence: 99%

“…Data are as in Fig. 9 with the addition of lower-frequency radio flux densities (Green 2009) and higher-frequency IRAS and Spitzer flux densities, and omission of the ERCSC flux densities. The dashed line is the power-law fit to the radio flux densities; the dotted line is the pulsar wind nebula model; and the dash-dotted line is that model with the addition of a second break with spectral index 0.92 above 200 GHz.…”

Section: C 58mentioning

confidence: 99%

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Planckintermediate results

Arnaud

Ashdown

Atrio-Barandela

et al. 2016

A&A

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The all-sky Planck survey in 9 frequency bands was used to search for emission from all 274 known Galactic supernova remnants. Of these, 16 were detected in at least two Planck frequencies. The radio-through-microwave spectral energy distributions were compiled to determine the mechanism for microwave emission. In only one case, IC 443, is there high-frequency emission clearly from dust associated with the supernova remnant. In all cases, the low-frequency emission is from synchrotron radiation. As predicted for a population of relativistic particles with energy distribution that extends continuously to high energies, a single power law is evident for many sources, including the Crab and PKS 1209-51/52. A decrease in flux density relative to the extrapolation of radio emission is evident in several sources. Their spectral energy distributions can be approximated as broken power laws, S ν ∝ ν −α , with the spectral index, α, increasing by 0.5-1 above a break frequency in the range 10-60 GHz. The break could be due to synchrotron losses.

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The Galactic distribution of SNRs

Green¹

2013

Proc. IAU

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It is not straightforward to determine the distribution of supernova remnants (SNRs) in the Galaxy. The two main difficulties are that there are observational selection effects that mean that catalogues of SNRs are incomplete, and distances are not available for most remnants. Here I discuss the selection effects that apply to the latest catalogue of Galactic SNRs. I then compare the observed distribution of `bright' SNRs in Galactic longitude with that expected from models in order to constrain the Galactic distribution of SNRs.Comment: 8 pages, to appear in the proceedings of IAU Symposium 296, "Supernova environmental impacts" (eds Ray and McCray

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Lawrence D. Green Responds

Cited by 13 publications

References 0 publications

A revised catalogue of 294 Galactic supernova remnants

A revised catalogue of 294 Galactic supernova remnants

Planckintermediate results

The Galactic distribution of SNRs

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