The superluminous supernova PS1-11ap: bridging the gap between low and high redshift
Author
McCrum, M.
Smartt, S. J.
Kotak, R.
Rest, A.
Jerkstrand, A.
Inserra, C.
Rodney, S. A.
Chen, T.- W.
Howell, D. A.
Huber, M. E.
Pastorello, A.
Tonry, J. L.
Bresolin, F.
Kudritzki, R.- P.
Chornock, R.
Smith, K.
Botticella, M. T.
Foley, R. J.
Fraser, M.
Nicholl, M.
Riess, A. G.
Valenti, S.
Wood-Vasey, W. M.
Wright, D.
Young, D. R.
Burgett, W. S.
Chambers, K. C.
Draper, P.
Flewelling, H.
Hodapp, K. W.
Kaiser, N.
Magnier, E. A.
Metcalfe, N.
Price, P. A.
Sweeney, W.
Wainscoat, R. J.
Note: Order does not necessarily reflect citation order of authors.
Published Version
https://doi.org/10.1093/mnras/stt1923Metadata
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McCrum, M., S. J. Smartt, R. Kotak, A. Rest, A. Jerkstrand, C. Inserra, S. A. Rodney, et al. 2013. “The Superluminous Supernova PS1-11ap: Bridging the Gap Between Low and High Redshift.” Monthly Notices of the Royal Astronomical Society 437 (1) (November 7): 656–674. doi:10.1093/mnras/stt1923.Abstract
We present optical photometric and spectroscopic coverage of the superluminous supernova (SLSN) PS1-11ap, discovered with the Pan-STARRS1 Medium Deep Survey at z = 0.524. This intrinsically blue transient rose slowly to reach a peak magnitude of Mu = −21.4 mag and bolometric luminosity of 8 × 1043 erg s−1 before settling on to a relatively shallow gradient of decline. The observed decline is significantly slower than those of the SLSNe-Ic which have been the focus of much recent attention. Spectroscopic similarities with the lower redshift SN2007bi and a decline rate similar to 56Co decay time-scale initially indicated that this transient could be a candidate for a pair instability supernova (PISN) explosion. Overall the transient appears quite similar to SN2007bi and the lower redshift object PTF12dam. The extensive data set, from 30 d before peak to 230 d after, allows a detailed and quantitative comparison with published models of PISN explosions. We find that the PS1-11ap data do not match these model explosion parameters well, supporting the recent claim that these SNe are not pair instability explosions. We show that PS1-11ap has many features in common with the faster declining SLSNe-Ic, and the light-curve evolution can also be quantitatively explained by the magnetar spin-down model. At a redshift of z = 0.524, the observer-frame optical coverage provides comprehensive rest-frame UV data and allows us to compare it with the SLSNe recently found at high redshifts between z = 2 and 4. While these high-z explosions are still plausible PISN candidates, they match the photometric evolution of PS1-11ap and hence could be counterparts to this lower redshift transient.Other Sources
http://arxiv.org/pdf/1310.4417v2.pdfTerms of Use
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