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Unifying Type II Supernova Light Curves with Dense Circumstellar Material

Morozova, Viktoriya and Piro, Anthony L. and Valenti, Stefano (2017) Unifying Type II Supernova Light Curves with Dense Circumstellar Material. Astrophysical Journal, 838 (1). Art. No. 28. ISSN 1538-4357. doi:10.3847/1538-4357/aa6251.

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A longstanding problem in the study of supernovae (SNe) has been the relationship between the Type IIP and Type IIL subclasses. Whether they come from distinct progenitors or they are from similar stars with some property that smoothly transitions from one class to another has been the subject of much debate. Here, using one-dimensional radiation-hydrodynamic SN models, we show that the multi-band light curves of SNe IIL are well fit by ordinary red supergiants surrounded by dense circumstellar material (CSM). The inferred extent of this material, coupled with a typical wind velocity of ~10-100 km s^(-1), suggests enhanced activity by these stars during the last ~months to ~years of their lives, which may be connected with advanced stages of nuclear burning. Furthermore, we find that, even for more plateau-like SNe, dense CSM provides a better fit to the first ~20 days of their light curves, indicating that the presence of such material may be more widespread than previously appreciated. Here we choose to model the CSM with a wind-like density profile, but it is unclear whether this just generally represents some other mass distribution, such as a recent mass ejection, thick disk, or even inflated envelope material. Better understanding the exact geometry and density distribution of this material will be an important question for future studies.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Piro, Anthony L.0000-0001-6806-0673
Valenti, Stefano0000-0001-8818-0795
Additional Information:© 2017 The American Astronomical Society. Received 2016 October 24; revised 2017 February 20; accepted 2017 February 20; published 2017 March 21. We acknowledge helpful discussions with and feedback from A. Burrows, D. Clausen, S. M. Couch, J. Fuller, D. Milisavljevic, C. D. Ott, D. Radice, B. J. Shappee, N. Smith, T. Sukhbold, and J. C. Wheeler. This work is supported in part by the National Science Foundation under award Nos. AST-1205732 and AST-1212170, by Caltech, and by the Sherman Fairchild Foundation. The computations were performed on the Caltech compute cluster Zwicky (NSF MRI-R2 award no. PHY-0960291) and on the MIES cluster of the Carnegie Observatories, which was made possible by a grant from the Ahmanson Foundation.
Group:TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Ahmanson FoundationUNSPECIFIED
Subject Keywords:hydrodynamics – radiative transfer – supernovae: general – supernovae: individual (SN 2013by, SN 2013ej, SN 2013fs)
Issue or Number:1
Record Number:CaltechAUTHORS:20170321-095438024
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Official Citation:Viktoriya Morozova et al 2017 ApJ 838 28
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75266
Deposited By: Tony Diaz
Deposited On:21 Mar 2017 17:21
Last Modified:15 Nov 2021 16:32

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