Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-18T09:56:16.434Z Has data issue: false hasContentIssue false
  • English
  • Français

Supernova 1986J: a Neutron Star or Black Hole in the Centre?

Published online by Cambridge University Press:  17 October 2017

Michael F. Bietenholz
Michael F. Bietenholz*
Affiliation:
Hartebeesthoek Radio Observatory, PO Box 443, Krugersdorp, 1740, South Africa Also at Department of Physics and Astronomy, York University, Toronto, M3J 1P3, Ontario, Canada
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Supernova 1986J is almost the same age as SN 1987A, but was Type IIn, and likely had a massive progenitor. Located at 10 Mpc in NGC 891, it is one of the few supernovae whose radio emission can be resolved using VLBI. We present a new 5-GHz global-VLBI image of SN 1986J from 2014 as well as broadband VLA flux-density measurements. SN 1986J is unusual in that a compact synchrotron radio-emitting component appeared in the centre of the expanding shell of ejecta ~14 yr after the explosion, which now dominates the VLBI image. The central component is stationary to within the uncertainties (<570 km s−1), and it has a marginally resolved HWHM radius of (6.7−3.7+0.7) × 1016 cm. The shell has expanded with average v ≃ 5400 km s−1. The central component’s 5-GHz flux density is still increasing with time, and at present it has a 5-GHz νLν luminosity of ~4 × 1035 erg s−1, ~20 times that of the Crab Nebula. The central component may be due to a newly formed pulsar wind nebula, or an accreting black hole, or it may be due to interaction of the supernova shock with a highly structured environment left over from a progenitor which was in a close binary system. We discuss the newest observations and the constraints on its nature.

Keywords

(stars:) supernovae: individual (SN 1986J)radio continuum: stars)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S331: Supernova 1987A:30 years later - Cosmic Rays and Nuclei from Supernovae and their aftermaths , February 2017 , pp. 57 - 62
Copyright
Copyright © International Astronomical Union 2017 

References

Bartel, N. & Bietenholz, M. F. 2014, in IAU Symposium, Vol. 296, Supernova Environmental Impacts, ed. Ray, A. & McCray, R. A., 53–57 Google Scholar
Bartel, N., Rupen, M. P., Shapiro, I. I., Preston, R. A., & Rius, A. 1991, Nature, 350, 212 CrossRefGoogle Scholar
Bietenholz, M. 2014, in 12th European VLBI Network Symposium and Users Meeting (2014), published by SISSA, Trieste, ed. Tarchi, A., Giroletti, M., & Feretti, L., 51Google Scholar
Bietenholz, M. F. & Bartel, N. 2007, ApJL, 665, L47 Google Scholar
Bietenholz, M. F. & Bartel, N. 2017, ApJ, 839, 10, Paper III Google Scholar
Bietenholz, M. F., Bartel, N., & Rupen, M. P. 2002, ApJ, 581, 1132, Paper IGoogle Scholar
Bietenholz, M. F., Bartel, N., & Rupen, M. P. 2004, Science, 304, 1947 CrossRefGoogle Scholar
Bietenholz, M. F., Bartel, N., & Rupen, M. P. 2010, ApJ, 712, 1057, Paper II Google Scholar
Chevalier, R. A. 2012, ApJL, 752, L2 CrossRefGoogle Scholar
Chevalier, R. A. & Fransson, C. 1992, ApJ, 395, 540 Google Scholar
Fender, R. P., Gallo, E., & Russell, D. 2010, MNRAS, 406, 1425 Google Scholar
Gelfand, J. D., Slane, P. O., & Zhang, W. 2009, ApJ, 703, 2051 CrossRefGoogle Scholar
Houck, J. C. 2005, in X-Ray and Radio Connections (eds. Sjouwerman, L.O. and Dyer, K.K). Published electronically by NRAO, http://www.aoc.nrao.edu/events/xraydio, 4.6.Google Scholar
Körding, E., Falcke, H., & Corbel, S. 2006, A&A, 456, 439 Google Scholar
Merloni, A., Heinz, S., & di Matteo, T., 2003, MNRAS, 345, 1057 CrossRefGoogle Scholar
Rupen, M. P., van Gorkom, J. H., Knapp, , et al. 1987, AJ, 94, 61 Google Scholar
Turtle, A. J., Campbell-Wilson, D., Bunton, J. D., et al. 1987, Nature, 327, 38 Google Scholar
Weiler, K. W., Panagia, N., Montes, M. J., & Sramek, R. A. 2002, ARAA, 40, 387 Google Scholar
Weiler, K. W., Panagia, N., & Sramek, R. A. 1990, ApJ, 364, 611 CrossRefGoogle Scholar
Zanardo, G., Staveley-Smith, L., Indebetouw, R., et al. 2014, ApJ, 796, 82 Google Scholar