California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Astronomy
California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Astronomy; Stockholm Univ. (Sweden). Oskar Klein Centre and Dept. of Astronomy
Liverpool John Moores Univ., Liverpool (United Kingdom). Astrophysics Research Inst.
Texas Tech Univ., Lubbock, TX (United States). Dept. of Physics and Astronomy
NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Astrophysics Science Division; Univ. of Maryland, College Park, MD (United States). Joint Space-Science Inst.
California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab.
Russian Academy of Sciences (RAS), St. Petersburg (Russian Federation). Ioffe Physical Technical Inst.
Stockholm Univ. (Sweden). Oskar Klein Centre and Dept. of Astronomy
Univ. of California, Berkeley, CA (United States). Space Sciences Lab.
Weizmann Inst. of Science, Rehovot (Israel). Dept. of Particle Physics and Astrophysics; Univ. of Copenhagen (Denmark). The Niels Bohr Inst. and Dark Cosmology Centre
California Inst. of Technology (CalTech), Pasadena, CA (United States). Infrared Processing and Analysis Center
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Astronomy
Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
Weizmann Inst. of Science, Rehovot (Israel). Dept. of Particle Physics and Astrophysics
Univ. of Geneva (Switzerland). Integral Science Data Centre (ISDC) and Dept. of Astronomy
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Wide-field surveys are discovering a growing number of rare transients whose physical origin is not yet well understood. We present optical and UV data and analysis of intermediate Palomar Transient Factory (iPTF) 16asu, a luminous, rapidly evolving, high-velocity, stripped-envelope supernova (SN). With a rest-frame rise time of just four days and a peak absolute magnitude of Mg = -20.4 mag, the light curve of iPTF 16asu is faster and more luminous than that of previous rapid transients. The spectra of iPTF 16asu show a featureless blue continuum near peak that develops into an SN Ic-BL spectrum on the decline. We show that while the late-time light curve could plausibly be powered by 56Ni decay, the early emission requires a different energy source. Nondetections in the X-ray and radio strongly constrain the energy coupled to relativistic ejecta to be at most comparable to the class of low-luminosity gamma-ray bursts (GRBs). We suggest that the early emission may have been powered by either a rapidly spinning-down magnetar or by shock breakout in an extended envelope of a very energetic explosion. In either scenario a central engine is required, making iPTF 16asu an intriguing transition object between superluminous SNe, SNe Ic-BL, and low-luminosity GRBs.
Whitesides, L., Lunnan, R., Kasliwal, M. M., Perley, D. A., Corsi, A., Cenko, S. B., Blagorodnova, N., Cao, Y., Cook, D. O., Doran, G. B., Frederiks, D. D., Fremling, C., Hurley, K., Karamehmetoglu, E., Kulkarni, S. R., Leloudas, G., Masci, F., Nugent, P. E., ... Wozniak, P. (2017). iPTF 16asu: A Luminous, Rapidly Evolving, and High-velocity Supernova. The Astrophysical Journal (Online), 851(2). https://doi.org/10.3847/1538-4357/aa99de
Whitesides, L., Lunnan, R., Kasliwal, M. M., et al., "iPTF 16asu: A Luminous, Rapidly Evolving, and High-velocity Supernova," The Astrophysical Journal (Online) 851, no. 2 (2017), https://doi.org/10.3847/1538-4357/aa99de
@article{osti_1456987,
author = {Whitesides, L. and Lunnan, R. and Kasliwal, M. M. and Perley, D. A. and Corsi, A. and Cenko, S. B. and Blagorodnova, N. and Cao, Y. and Cook, D. O. and Doran, G. B. and others},
title = {iPTF 16asu: A Luminous, Rapidly Evolving, and High-velocity Supernova},
annote = {Wide-field surveys are discovering a growing number of rare transients whose physical origin is not yet well understood. We present optical and UV data and analysis of intermediate Palomar Transient Factory (iPTF) 16asu, a luminous, rapidly evolving, high-velocity, stripped-envelope supernova (SN). With a rest-frame rise time of just four days and a peak absolute magnitude of Mg = -20.4 mag, the light curve of iPTF 16asu is faster and more luminous than that of previous rapid transients. The spectra of iPTF 16asu show a featureless blue continuum near peak that develops into an SN Ic-BL spectrum on the decline. We show that while the late-time light curve could plausibly be powered by 56Ni decay, the early emission requires a different energy source. Nondetections in the X-ray and radio strongly constrain the energy coupled to relativistic ejecta to be at most comparable to the class of low-luminosity gamma-ray bursts (GRBs). We suggest that the early emission may have been powered by either a rapidly spinning-down magnetar or by shock breakout in an extended envelope of a very energetic explosion. In either scenario a central engine is required, making iPTF 16asu an intriguing transition object between superluminous SNe, SNe Ic-BL, and low-luminosity GRBs.},
doi = {10.3847/1538-4357/aa99de},
url = {https://www.osti.gov/biblio/1456987},
journal = {The Astrophysical Journal (Online)},
issn = {ISSN 1538-4357},
number = {2},
volume = {851},
place = {United States},
publisher = {Institute of Physics (IOP)},
year = {2017},
month = {12}}
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); National Science Foundation (NSF); National Aeronautic and Space Administration (NASA); Russian Science Foundation (RSF)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1456987
Journal Information:
The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 2 Vol. 851; ISSN 1538-4357