2011A&A...532L...8L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST20:20:38

2011A&A...532L...8L - Astronomy and Astrophysics, volume 532, L8-8 (2011/8-1)

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

LAKICEVIC M., VAN LOON J.T., PATAT F., STAVELEY-SMITH L. and ZANARDO G.

Abstract (from CDS):

Supernova 1987A (SN1987A) 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 SN1987A, as SNe could contribute significantly to the dust seen at high redshifts. We explore the properties of SN1987A 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. SN1987A was observed with the Australia Telescope Compact Array (ATCA) at 3.2mm in July 2005, and with the Atacama Pathfinder EXperiment (APEX) at 0.87mm in May 2007. We present the images and brightness measurements of SN1987A at these wavelengths for the first time. SN1987A is detected as an unresolved point source of 11.2±2.0mJy at 3.2mm (5'' beam) and 21±4mJy at 0.87mm (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 SN1987A. Adjacent, fainter emission is observed at 0.87mm 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. We have established a continuous spectral energy distribution for the emission from SN1987A 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 SN1987A, but leaves room for freshly synthesized dust in the SN ejecta.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - ISM: individual objects: SN1987A - radio continuum: ISM - submillimeter: ISM - infrared: ISM

Simbad objects: 8

goto Full paper

goto View the reference in ADS

Number of rows : 8

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 QSO B0454-810 QSO 04 50 05.44020132 -81 01 02.2313228   19.31 19.2 18.30   ~ 112 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
3 SNR J052559-660453 SNR 05 26 00.4 -66 05 02     12.71     ~ 407 2
4 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4485 2
5 NAME Honeycomb Nebula SNR 05 35 46 -69 18.0           ~ 45 0
6 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 508 1
7 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2704 2
8 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 689 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2011A&A...532L...8L and select 'bookmark this link' or equivalent in the popup menu


2020.07.11-20:20:38

© Université de Strasbourg/CNRS

    • Contact