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arXiv · 1910.02968

Four (Super)luminous Supernovae from the First Months of the ZTF Survey

R. Lunnan·Lin Yan·D. A. Perley·S. Schulze·K. Taggart·A. Gal-Yam·C. Fremling·M. T. Soumagnac·E. Ofek·S. M. Adams·C. Barbarino·E. C. Bellm·K. De·C. Fransson·S. Frederick·V. Z. Golkhou·M. J. Graham·N. Hallakoun·A. Y. Q. Ho·M. M. Kasliwal·S. Kaspi·S. R. Kulkarni·R. R. Laher·F. J. Masci·F. Pozo Nunez·B. Rusholme·R. M. Quimby·D. L. Shupe·J. Sollerman·F. Taddia·J. van Roestel·Y. Yang·Yuhan Yao
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Abstract

We present photometry and spectroscopy of four hydrogen-poor luminous supernovae discovered during the two-month science commissioning and early operations of the Zwicky Transient Facility (ZTF) survey. Three of these objects, SN2018bym (ZTF18aapgrxo), SN2018avk (ZTF18aaisyyp) and SN2018bgv (ZTF18aavrmcg) resemble typical SLSN-I spectroscopically, while SN2018don (ZTF18aajqcue) may be an object similar to SN2007bi experiencing considerable host galaxy reddening, or an intrinsically long-lived, luminous and red SN Ic. We analyze the light curves, spectra, and host galaxy properties of these four objects and put them in context of the population of SLSN-I. SN2018bgv stands out as the fastest-rising SLSN-I observed to date, with a rest-frame g-band rise time of just 10 days from explosion to peak -- if it is powered by magnetar spin-down, the implied ejecta mass is only ~1 M$_{\odot}$. SN2018don also displays unusual properties -- in addition to its red colors and comparatively massive host galaxy, the light curve undergoes some of the strongest light curve undulations post-peak seen in a SLSN-I, which we speculate may be due to interaction with circumstellar material. We discuss the promises and challenges of finding SLSNe in large-scale surveys like ZTF given the observed diversity in the population.

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R. Lunnan, Lin Yan, D. A. Perley, S. Schulze, K. Taggart, A. Gal-Yam, C. Fremling, M. T. Soumagnac, E. Ofek, S. M. Adams, C. Barbarino, E. C. Bellm, K. De, C. Fransson, S. Frederick, V. Z. Golkhou, M. J. Graham, N. Hallakoun, A. Y. Q. Ho, M. M. Kasliwal, S. Kaspi, S. R. Kulkarni, R. R. Laher, F. J. Masci, F. Pozo Nunez, B. Rusholme, R. M. Quimby, D. L. Shupe, J. Sollerman, F. Taddia, J. van Roestel, Y. Yang, Yuhan Yao. 2019-10-07. Four (Super)luminous Supernovae from the First Months of the ZTF Survey. https://doi.org/10.3847/1538-4357%2Fabaeec

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