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The radio remnant of Supernova 1987A at high frequencies and high resolution

Published online by Cambridge University Press:  29 January 2014

G. Zanardo ,
L. Staveley-Smith ,
C. -Y. Ng ,
B. M. Gaensler ,
T. M. Potter ,
R. N. Manchester  and
A. K. Tzioumis
G. Zanardo
Affiliation:
International Centre for Radio Astronomy Research (ICRAR), M468, The University of Western Australia, Crawley, WA 6009, Australia. email: [email protected]
L. Staveley-Smith
Affiliation:
International Centre for Radio Astronomy Research (ICRAR), M468, The University of Western Australia, Crawley, WA 6009, Australia. email: [email protected] Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)
C. -Y. Ng
Affiliation:
Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong
B. M. Gaensler
Affiliation:
Sydney Institute for Astronomy (SIfA), School of Physics, The University of Sydney, NSW 2006, Australia Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)
T. M. Potter
Affiliation:
International Centre for Radio Astronomy Research (ICRAR), M468, The University of Western Australia, Crawley, WA 6009, Australia. email: [email protected]
R. N. Manchester
Affiliation:
CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
A. K. Tzioumis
Affiliation:
CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
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Abstract

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As the remnant of Supernova (SN) 1987A has been getting brighter over time, new observations at high frequencies have allowed imaging of the radio emission at unprecedented detail. We present a new radio image at 44 GHz of the supernova remnant (SNR), derived from observations performed with the Australia Telescope Compact Array (ATCA) in 2011. The diffraction-limited image has a resolution of 349×225 mas, which is the highest achieved to date in high-dynamic range images of the SNR. We also present a new image at 18 GHz, also derived from ATCA observations performed in 2011, which is super-resolved to 0″.25. The new 44 and 18 GHz images yield the first high-resolution spectral index map of the remnant. The comparison of the 44 GHz image with contemporaneous X-ray and Hα observations allows further investigations of the nature of the remnant asymmetry and sheds more light into the progenitor hypotheses and SN explosion. In light of simple free-free absorption models, we discuss the likelihood of detecting at 44 GHz the possible emission originating from a pulsar wind nebula (PWN) or a compact source in the centre of the remnant.

Keywords

circumstellar matterISM: supernova remnantsradio continuum: generalsupernovae: individual (SN 1987A)acceleration of particlesradiation mechanisms: nonthermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 23 - 26
Copyright
Copyright © International Astronomical Union 2014 

References

Ball, L., Crawford, D. F., Hunstead, R. W., Klamer, I., & McIntyre, V. J. 2001, ApJ, 549, 599Google Scholar
Blondin, J. M. & Lundqvist, P. 1993, ApJ, 405, 337CrossRefGoogle Scholar
Crotts, A. P. S. & Heathcote, R. S. 2000, ApJ, 528, 426CrossRefGoogle Scholar
Gaensler, B. M., Manchester, R. N., Staveley-Smith, L., Tzioumis, A. K., Reynolds, J. E., & Kesteven, M. J. 1997, ApJ, 479, 845CrossRefGoogle Scholar
Gaensler, B. M. 1998, ApJ, 493, 781CrossRefGoogle Scholar
Gaensler, B. M., Staveley-Smith, L., Manchester, R. N., Kesteven, M. J., Ball, L., & Tzioumis, A. K. 2007, in AIP Conf. Proc. 937, Supernova 1987A: 20 Years After: Supernovae and Gamma-Ray Bursters, ed. Immler, S., Weiler, K. W., & McCray, R. (New York: AIP), 86Google Scholar
Helder, E. A., Broos, P. S., Dewey, D., Dwek, E., McCray, R., Park, S., Racusin, J. L., Zhekov, S. A., & Burrows, D. N. 2013, ApJ, 764, 11CrossRefGoogle Scholar
Jakobsen, P.et al. 1991, ApJ, 369, 63CrossRefGoogle Scholar
Lakićević, M., Zanardo, G., van Loon, J. Th., Staveley-Smith, L., Potter, T., Ng, C.-Y., & Gaensler, B. M. 2012, A&A, 541, L2Google Scholar
Larsson, J.et al. 2011, Nature, 474, L484Google Scholar
Manchester, R. N., Gaensler, B. M., Wheaton, V. C., Staveley-Smith, L., Tzioumis, A. K., Bizunok, N. S., Kesteven, M. J., & Reynolds, J. E. 2002, PASA, 19, 207Google Scholar
Manchester, R. N., Gaensler, B. M., Staveley-Smith, L., Kesteven, M. J., & Tzioumis, A. K. 2005, ApJ, 628, L131Google Scholar
Martin, C. L. & Arnett, D. 1995 ApJ, 447, 378CrossRefGoogle Scholar
Morris, T. & Podsiadlowski, P. 2007, Science, 315, 1103CrossRefGoogle Scholar
Ng, C.-Y., Gaensler, B. M., Staveley-Smith, L., Manchester, R. N., Kesteven, M. J., Ball, L., & Tzioumis, A. K. 2008, ApJ, 684, 481CrossRefGoogle Scholar
Ng, C.-Y.et al. 2011, ApJ (Letters), 728, L15CrossRefGoogle Scholar
Plait, P. C., Lundqvist, P., Chevalier, R. A., & Kirshner, R. P. 1995, ApJ, 439, 730Google Scholar
Podsiadlowski, Ph., Morris, T. S., & Ivanova, N. 2007, AIP Conf. Proc., 937, 125–133CrossRefGoogle Scholar
Potter, T. M., Staveley-Smith, L., Ng, C.-Y., Ball, Lewis, Gaensler, B. M., Kesteven, M. J., Manchester, R. N., Tzioumis, A. K., & Zanardo, G. 2009, ApJ, 705, 261Google Scholar
Reynolds, J. E.et al. 1995, A&A, 304, 116Google Scholar
Staveley-Smith, L.et al. 1992, Nature, 355, 147CrossRefGoogle Scholar
Staveley-Smith, L.et al. 1993, Nature, 366, 136Google Scholar
Staveley-Smith, L., Gaensler, B. M., Manchester, R. N., Ball, L., Kesteven, M. J., & Tzioumis, A. K. 2007, in AIP Conf. Proc. 937, Supernova 1987A: 20 Years After: Supernovae and Gamma-Ray Bursters, ed. Immler, S., Weiler, K.W., & McCray, R., (New York: AIP), 96Google Scholar
Tingay, S.et al. 2009, in 8th International e-VLBI Workshop, Proc. Sci., 100.Google Scholar
Turtle, A. J., Campbell-Wilson, D., Manchester, R. N., Staveley-Smith, L., & Kesteven, M. J. 1990, IAU Circ. 5086, 2Google Scholar
Wilson, W. E.et al., MNRAS, 416, 832CrossRefGoogle Scholar
Zanardo, G., Staveley-Smith, L., Ball, Lewis, Gaensler, B. M., Kesteven, M. J., Manchester, R. N., Ng, C.-Y., Tzioumis, A. K., & Potter, T. M. 2010, ApJ, 710, 1515CrossRefGoogle Scholar
Zanardo, G., Staveley-Smith, L., Ng, C.-Y., Gaensler, B. M., Potter, T. M., Manchester, R. N., & Tzioumis, A. K. 2013, ApJ, 767, 98Google Scholar