GALEX detection of shock breakout in type IIP supernova PS1-13arp: Implications for the progenitor STAR wind

Journal Article · Fri May 01 00:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/804/1/28· OSTI ID:22883252

Gezari, S.; Hung, T.; Heinis, S. ^[1]; Jones, D. O.; Riess, A. G. ^[2]; Sanders, N. E.; Soderberg, A. M.; Berger, E.; Stubbs, C. W.; Kirshner, R. P. ^[3]; Smartt, S. J.; Smith, K. ^[4]; Rest, A. ^[5]; Scolnic, D. ^[6]; Chornock, R. ^[7]; Foley, R. J. ^[8]; Huber, M. E. ^[9]; Price, P. ^[10]; Wood-Vasey, W. M. ^[11]; others, and

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1. Department of Astronomy, University of Maryland, Stadium Drive, College Park, MD 20742–2421 (United States)
2. Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218 (United States)
3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States)
4. Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN (United Kingdom)
5. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 (United States)
6. Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States)
7. Ohio University, 1 Ohio University, Athens, OH 45701 (United States)
8. Astronomy Department, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801 (United States)
9. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, Hawaii 96822 (United States)
10. Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544 (United States)
11. Pittsburgh Particle Physics, Astrophysics, and Cosmology Center, Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, Pennsylvania, PA 15260 (United States)

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 ∼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 ∼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 ∼10{sup −3} M{sub ⊙} yr{sup −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 non-standard, 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.

• OSTI ID: 22883252
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 804; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COMPARATIVE EVALUATIONS
DETECTION
EMISSION
LUMINOSITY
MASS TRANSFER
STELLAR WINDS
SUPERNOVAE
ULTRAVIOLET RADIATION