Jets in Hydrogen-poor Superluminous Supernovae: Constraints from a Comprehensive Analysis of Radio Observations

D. L. Coppejans, R. Margutti, C. Guidorzi, L. Chomiuk, K. D. Alexander, E. Berger, M. F. Bietenholz, P. K. Blanchard, P. Challis, R. Chornock, M. Drout, W. Fong, A. MacFadyen, G. Migliori, D. Milisavljevic, M. Nicholl, J. T. Parrent, G. Terreran, B. A. Zauderer

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The energy source powering the extreme optical luminosity of hydrogen-stripped superluminous supernovae (SLSNe-I) is not known, but recent studies have highlighted the case for a central engine. Radio and/or X-ray observations are best placed to track the fastest ejecta and probe the presence of outflows from a central engine. We compile all the published radio observations of SLSNe-I to date and present three new observations of two new SLSNe-I. None were detected. Through modeling the radio emission, we constrain the subparsec environments and possible outflows in SLSNe-I. In this sample, we rule out on-axis collimated relativistic jets of the kind detected in gamma-ray bursts (GRBs). We constrain off-axis jets with opening angles of 5° (30°) to energies of () in environments shaped by progenitors with mass-loss rates of () for all off-axis angles, assuming fiducial values and . The deepest limits rule out emission of the kind seen in faint uncollimated GRBs (with the exception of GRB 060218) and from relativistic SNe. Finally, for the closest SLSN-I, SN 2017egm, we constrain the energy of an uncollimated nonrelativistic outflow like those observed in normal SNe to erg.

Original languageEnglish (US)
Article number56
JournalAstrophysical Journal
Issue number1
StatePublished - Mar 20 2018


  • stars: jets
  • supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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