Light Curve Powering Mechanisms of Superluminous Supernovae

Light Curve Powering Mechanisms of Superluminous Supernovae

Bibliographic Details
Main Author: Bhirombhakdi, Kornpob
Language:English
Published: Ohio University / OhioLINK 2019
Subjects:
Astronomy
Astrophysics
supernovae
SN 2008es
SN 2015bn
circumstellar interaction
magnetar spindow
dust
X-rays
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou15535125105111452021-08-03T07:09:47Z Light Curve Powering Mechanisms of Superluminous Supernovae Bhirombhakdi, Kornpob Astronomy Astrophysics supernovae SN 2008es SN 2015bn circumstellar interaction magnetar spindow dust X-rays The power sources of some superluminous supernovae (SLSNe), which are at peak 10--100 times brighter than typical SNe, are still unknown. While some hydrogen-rich SLSNe that show narrow H$\alpha$ emission (SLSNe-IIn) might be explained by strong circumstellar interaction (CSI) similar to typical SNe IIn, there are some hydrogen-rich events without the narrow H$\alpha$ features (SLSNe-II) and hydrogen-poor ones (SLSNe-I) that strong CSI has difficulties to explain. In this dissertation, I investigate the power sources of these two SLSN classes. SN 2015bn (SLSN-I) and SN 2008es (SLSN-II) are the targets in this study. I perform late-time multi-wavelength observations on these objects to determine their power sources. Evidence supports that SN 2008es was powered by strong CSI, while the late-time X-ray non-detection we observed neither supports nor denies magnetar spindown as the most preferred power origin of SN 2015bn. Interestingly, we identify the missing energy problem for SN 2015bn: $>$97 \% of the total spindown luminosity must be in other forms besides the UV/optical/infrared and 0.3--10 keV X-rays. This dissertation also contains a preliminary study of the UV/optical photometric properties of CSI motivated by SN 2008es. In future studies, I aim to understand the UV excess phase of CSI SNe, and hope to be able to develop a better way to describe the spectral energy distribution (SED) and its evolution. Preliminary systematic study of 15 SNe IIn reveals interesting features, and shows promising results that would lead to interesting implications such as a better description for the SED of CSI SNe during the UV excess. 2019-06-04 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Astronomy
Astrophysics
supernovae
SN 2008es
SN 2015bn
circumstellar interaction
magnetar spindow
dust
X-rays
spellingShingle Astronomy
Astrophysics
supernovae
SN 2008es
SN 2015bn
circumstellar interaction
magnetar spindow
dust
X-rays
Bhirombhakdi, Kornpob
Light Curve Powering Mechanisms of Superluminous Supernovae
author Bhirombhakdi, Kornpob
author_facet Bhirombhakdi, Kornpob
author_sort Bhirombhakdi, Kornpob
title Light Curve Powering Mechanisms of Superluminous Supernovae
title_short Light Curve Powering Mechanisms of Superluminous Supernovae
title_full Light Curve Powering Mechanisms of Superluminous Supernovae
title_fullStr Light Curve Powering Mechanisms of Superluminous Supernovae
title_full_unstemmed Light Curve Powering Mechanisms of Superluminous Supernovae
title_sort light curve powering mechanisms of superluminous supernovae
publisher Ohio University / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145
work_keys_str_mv AT bhirombhakdikornpob lightcurvepoweringmechanismsofsuperluminoussupernovae
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