1. The diversity of Type II supernova versus the similarity in their progenitors
- Author
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Giacomo Terreran, Maximilian Stritzinger, Mark Sullivan, C. Baltay, David J. Sand, Curtis McCully, Iair Arcavi, Anders Jerkstrand, S. Valenti, S. Benetti, D. A. Howell, Alexei V. Filippenko, A. Pastorello, Anthony L. Piro, Fang Yuan, Peter J. Brown, Morgan Fraser, Stephen J. Smartt, Lars Bildsten, Griffin Hosseinzadeh, Melissa L. Graham, David Rabinowitz, Fraser, Morgan [0000-0003-2191-1674], and Apollo - University of Cambridge Repository
- Subjects
SN 2014G ,supernovae: individual: SN 2013bu, SN 2013fs, SN 2014cy, SN 2013ej, ASASSN14ha, ASASSN-14gm, ASASSN-14dq, SN 2013ab, SN 2013by, SN 2014G, LSQ13dpa, LSQ14gv, SN 2014G, SN 2013ab, SN 2015W ,SN 2014cy ,Library science ,FOS: Physical sciences ,ASASSN-14ha ,LSQ14gv ,01 natural sciences ,supernovae: general ,Observatory ,SN 2013ej ,0103 physical sciences ,media_common.cataloged_instance ,European union ,ASASSN-14dq ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,media_common ,Physics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,LSQ13dpa ,010308 nuclear & particles physics ,European research ,ASASSN-14gm ,SN 2013by ,Astronomy and Astrophysics ,SN 2013ab ,Astrophysics - Solar and Stellar Astrophysics ,SN 2015W ,13. Climate action ,Space and Planetary Science ,individual: SN 2013bu [supernovae] ,Astrophysics - High Energy Astrophysical Phenomena ,general [supernovae] ,SN 2013fs ,Diversity (business) - Abstract
High-quality collections of Type II supernova (SN) light curves are scarce because they evolve for hundreds of days, making follow-up observations time consuming and often extending over multiple observing seasons. In light of these difficulties, the diversity of SNe II is not fully understood. Here we present ultraviolet and optical photometry of 12 SNe II monitored by the Las Cumbres Observatory Global Telescope Network (LCOGT) during 2013-2014, and compare them with previously studied SNe having well-sampled light curves. We explore SN II diversity by searching for correlations between the slope of the linear light-curve decay after maximum light (historically used to divide SNe II into IIL and IIP) and other measured physical properties. While SNe IIL are found to be on average more luminous than SNe IIP, SNe IIL do not appear to synthesize more 56Ni than SNe IIP. Finally, optical nebular spectra obtained for several SNe in our sample are found to be consistent with models of red supergiant progenitors in the 12-16 Msun range. Consequently, SNe IIL appear not to account for the deficit of massive red supergiants as SN II progenitors., 27 pages, 28 figures, submitted to MNRAS, data in supplementary table, accepted in MNRAS (Accepted 2016 April 12)
- Published
- 2016