2012A&A...541L...2L


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.19CET17:04:41

2012A&A...541L...2L - Astronomy and Astrophysics, volume 541, L2-2 (2012/5-1)

The remnant of supernova 1987A resolved at 3-mm wavelength.

LAKICEVIC M., ZANARDO G., VAN LOON J.T., STAVELEY-SMITH L., POTTER T., NG C.-Y. and GAENSLER B.M.

Abstract (from CDS):

The proximity of core-collapse supernova 1987A (SN1987A) in the Large Magellanic Cloud (LMC) and its rapid evolution make it a unique case study of the development of a young supernova remnant. We aim at resolving the remnant of SN1987A for the first time in the 3-mm band (at 94GHz). We observed the source at 3-mm wavelength with a 750-m configuration of the Australia Telescope Compact Array (ATCA). We compared the image with a recent 3-cm image and with archival X-ray images. We present a diffraction-limited image with a resolution of 0.7", revealing the ring structure seen at lower frequencies and at other wavebands. The emission peaks in the eastern part of the ring. The 3-mm image bears resemblance to early X-ray images (from 1999-2000). We place an upper limit of 1 mJy (2σ) on any discrete source of emission in the centre (inside of the ring). The integrated flux density at 3mm has doubled over the six years since the previous observations at 3mm. At 3mm - i.e. within the operational domain of the Atacama Large Millimeter/submillimeter Array (ALMA) - SN1987A appears to be dominated by synchrotron radiation from the inner rim of the equatorial ring, characterised by moderately weak shocks. There is no clear sign of emission of a different nature, but the current limits do not rule out such component altogether.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - radio continuum: ISM - Magellanic Clouds - supernovae: individual: SN 1987A

VizieR on-line data: <Available at CDS (J/A+A/541/L2): fits.dat fig/*>

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5495 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14540 1
3 ICRF J052930.0-724528 QSO 05 29 30.04217690 -72 45 28.5072742   19.61   17.895   ~ 76 1
4 NAME SNR 1987A SNR 05 35 28.0 -69 16 11           ~ 34 0
5 SN 1987A SN* 05 35 28.020 -69 16 11.07   4.75 4.81     SN.IIPec 4416 2
6 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 504 1
7 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 666 0

    Equat.    Gal    SGal    Ecl

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2020.02.19-17:04:41

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