GALEX Detection of Shock Breakout in Type IIP Supernova PS1-13arp: Implications for the Progenitor Star Wind

S. Gezari*, D. O. Jones, N. E. Sanders, A. M. Soderberg, T. Hung, S. Heinis, S. J. Smartt, A. Rest, D. Scolnic, R. Chornock, E. Berger, R. J. Foley, M. E. Huber, P. Price, C. W. Stubbs, A. G. Riess, R. P. Kirshner, K. Smith, W. M. Wood-Vasey, D. SchiminovichD. C. Martin, W. S. Burgett, K. C. Chambers, H. Flewelling, N. Kaiser, J. L. Tonry, R. Wainscoat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

We present the GALEX detection of a UV burst at the time of explosion of an optically normal supernova (SN) IIP (PS1-13arp) from the Pan-STARRS1 survey at z = 0.1665. The temperature and luminosity of the UV burst match the theoretical predictions for shock breakout in a red supergiant (RSG), but with a duration a factor of similar to 50 longer than expected. We compare the NUV light curve of PS1-13arp to previous GALEX detections of SNe IIP and find clear distinctions that indicate that the UV emission is powered by shock breakout, and not by the subsequent cooling envelope emission previously detected in these systems. We interpret the similar to 1 day duration of the UV signal with a shock breakout in the wind of an RSG with a pre-explosion mass-loss rate of similar to 10(-3) M-circle dot yr(-1). This mass-loss rate is enough to prolong the duration of the shock breakout signal, but not enough to produce an excess in the optical plateau light curve or narrow emission lines powered by circumstellar interaction. This detection of nonstandard, potentially episodic high mass loss in an RSG SN progenitor has favorable consequences for the prospects of future wide-field UV surveys to detect shock breakout directly in these systems, and provide a sensitive probe of the pre-explosion conditions of SN progenitors.

Original languageEnglish
Article number28
Number of pages10
JournalThe Astrophysical Journal
Volume804
Issue number1
DOIs
Publication statusPublished - 01 May 2015

Keywords

  • supernovae: individual (PS1-13arp)
  • surveys
  • ultraviolet: general
  • CORE-COLLAPSE SUPERNOVAE
  • DIGITAL SKY SURVEY
  • X-RAY-EMISSION
  • RED SUPERGIANT
  • MASS-LOSS
  • ULTRALUMINOUS SUPERNOVAE
  • PAN-STARRS1 DISCOVERY
  • CIRCUMSTELLAR WIND
  • P SUPERNOVAE
  • LIGHT CURVES

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