HIGH RESOLUTION 36 GHz IMAGING OF THE SUPERNOVA REMNANT OF SN 1987A

Potter, Toby; Ng, C.‐Y.; Ball, Lewis; Gaensler, B. M.; Kesteven, M. J.; Manchester, R. N.; Tzioumis, A. K.; Zanardo, Giovanna

doi:10.1088/0004-637x/705/1/261

Cited by 29 publications

(63 citation statements)

References 41 publications

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“…This renders the measurements by Manchester et al (2005) somewhat "too" faint. Likewise, for the period 2007-2010 a value for α radio ≈ 0.7 fits the 3-21 cm data well, but again the higher frequency datum published by Potter et al (2009) lies below an extrapolation of this powerlaw component. Given the difficulty in radio interferometry of conserving flux at the longest baselines, we are tempted to believe the 3.2-mm datum is consistent with a pure synchrotron component.…”

Section: Bridging the Ir And Radio Spectral Energy Distributionsmentioning

confidence: 56%

“…They conjoin the far-IR emission detected up to λ = 350 μm (Matsuura et al 2011) attributed to thermal radiation from dust grains, on the one hand, and the radio emission detected down to λ = 0.8 cm (Potter et al 2009) attributed to synchrotron radiation from free charge in a magnetic field, on the other. The full spectral energy distribution (SED) is plotted in Fig.…”

Section: Bridging the Ir And Radio Spectral Energy Distributionsmentioning

confidence: 80%

“…3, where the IR data comprise groundbased nearand mid-IR, and Spitzer observations published by Bouchet et al (2006), AKARI observations published by Seok et al (2008), a Spitzer 70-μm upper limit published by Dwek et al (2010) and Herschel observations published by Matsuura et al (2011) 1 . The radio data solely comprise ATCA observations, published by Manchester et al (2005), Potter et al (2009), and by the most up-to-date summary at the longest wavelengths by Zanardo et al (2010). In Fig.…”

Section: Bridging the Ir And Radio Spectral Energy Distributionsmentioning

confidence: 99%

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The remnant of SN 1987A revealed at (sub-)mm wavelengths

Lakićević

Loon

Patat

et al. 2011

A&A

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Context. Supernova 1987A (SN 1987A) exploded in the Large Magellanic Cloud (LMC). Its proximity and rapid evolution makes it a unique case study of the early phases in the development of a supernova remnant. One particular aspect of interest is the possible formation of dust in SN 1987A, as SNe could contribute significantly to the dust seen at high redshifts. Aims. We explore the properties of SN 1987A and its circumburst medium as seen at mm and sub-mm wavelengths, bridging the gap between extant radio and infrared (IR) observations of respectively the synchrotron and dust emission. Results. SN 1987A is detected as an unresolved point source of 11.2 ± 2.0 mJy at 3.2 mm (5 beam) and 21 ± 4 mJy at 0.87 mm (18 beam). These flux densities are in perfect agreement with extrapolations of the powerlaw radio spectrum and modified-blackbody dust emission, respectively. This places limits on the presence of free-free emission, which is similar to the expected free-free emission from the ionized ejecta from SN 1987A. Adjacent, fainter emission is observed at 0.87 mm extending ∼0.5 towards the south-west. This could be the impact of the supernova progenitor's wind when it was still a red supergiant upon a dense medium. Conclusions. We have established a continuous spectral energy distribution for the emission from SN 1987A and its immediate surroundings, linking the IR and radio data. This places limits on the contribution from ionized plasma. Our sub-mm image reveals complexity in the distribution of cold dust surrounding SN 1987A, but leaves room for freshly synthesized dust in the SN ejecta.

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Section: Bridging the Ir And Radio Spectral Energy Distributionsmentioning

confidence: 56%

Section: Bridging the Ir And Radio Spectral Energy Distributionsmentioning

confidence: 80%

Section: Bridging the Ir And Radio Spectral Energy Distributionsmentioning

confidence: 99%

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The remnant of SN 1987A revealed at (sub-)mm wavelengths

Lakićević

Loon

Patat

et al. 2011

A&A

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“…The observed shape of the remnant, especially at radio frequencies, is not very far from spherically symmetric, even though the observed emission varies around the remnant's periphery (Potter et al 2009). This suggests that a spherically symmetric model is a reasonable first-order approximation for a study of the general nonthermal properties of the remnant.…”

Section: Introductionmentioning

confidence: 91%

Expected Gamma-Ray Emission of Supernova Remnant Sn 1987a

Berezhko

Ksenofontov

Völk

2011

ApJ

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A nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova remnants (SNRs) is employed to re-examine the nonthermal properties of the remnant of SN 1987A for an extended evolutionary period of 5-100 yr. It is shown that an efficient production of nuclear CRs leads to a strong modification of the outer SNR shock and to a large downstream magnetic field B d ≈ 20 mG. The shock modification and the strong field are required to yield the steep radio emission spectrum observed, as well as the considerable synchrotron cooling of high-energy electrons which diminishes their X-ray synchrotron flux. These features are also consistent with the existing X-ray observations. The expected γ -ray energy flux at TeV energies at the current epoch is nearly γ F γ ≈ 4 × 10 −13 erg cm 2 s −1 under reasonable assumptions about the overall magnetic field topology and the turbulent perturbations of this field. The general nonthermal strength of the source is expected to increase roughly by a factor of two over the next 15-20 years; thereafter, it should decrease with time in a secular form.

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“…Observations at higher frequencies (18, 36, 44 and 94 GHz) undertaken with ATCA (Manchester et al 2005;Potter et al 2009;Lakićević et al 2012;Zanardo et al 2013), followed by observations at 110, 215, and 345 GHz with the Atacama Millimeter/Submillimeter Array (ALMA), show the same asymmetric double lobe morphology Zanardo et al 2014). Also ALMA observations revealed the presence of one of the largest masses of cold dust (greater than 0.2 M ) ever measured in a SNR.…”

Section: Supernova Remnants In the Magellanic Cloudsmentioning

confidence: 81%

Radio Emission from Supernova Remnants

Dubner

2016

Handbook of Supernovae

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The explosion of a supernova releases almost instantaneously about 10 51 ergs of mechanic energy, changing irreversibly the physical and chemical properties of large regions in the galaxies. The stellar ejecta, the nebula resulting from the powerful shock waves, and sometimes a compact stellar remnant, constitute a supernova remnant (SNR). They can radiate their energy across the whole electromagnetic spectrum, but the great majority are radio sources. Almost 70 years after the first detection of radio emission coming from a SNR, great progress has been achieved in the comprehension of their physical characteristics and evolution. We review the present knowledge of different aspects of radio remnants, focusing on sources of the Milky Way and the Magellanic Clouds, where the SNRs can be spatially resolved. We present a brief overview of theoretical background, analyze morphology and polarization properties, and review and critical discuss different methods applied to determine the radio spectrum and distances. The consequences of the interaction between the SNR shocks and the surrounding medium are examined, including the question of whether SNRs can trigger the formation of new stars. Cases of multispectral comparison are presented. A section is devoted to reviewing recent results of radio SNRs in the Magellanic Clouds, with particular emphasis on the radio properties of SN 1987A, an ideal laboratory to investigate dynamical evolution of an SNR in near real time. The review concludes with a summary of issues on radio SNRs that deserve fur-G. Dubner and E. Giacani are members of the "Carrera del Investigador Científico" of CONICET, Argentina

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HIGH RESOLUTION 36 GHz IMAGING OF THE SUPERNOVA REMNANT OF SN 1987A

Cited by 29 publications

References 41 publications

The remnant of SN 1987A revealed at (sub-)mm wavelengths

The remnant of SN 1987A revealed at (sub-)mm wavelengths

Expected Gamma-Ray Emission of Supernova Remnant Sn 1987a

Radio Emission from Supernova Remnants

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