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Light Curve Powering Mechanisms of Superluminous Supernovae

Bhirombhakdi, Kornpob
http://orcid.org/0000-0003-0136-1281
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145

Abstract Details

2019, Doctor of Philosophy (PhD), Ohio University, Physics and Astronomy (Arts and Sciences).
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.
Ryan Chornock, Ph.D. (Advisor)
Douglas Clowe, Ph.D. (Committee Member)
Madappa Prakash, Ph.D. (Committee Member)
Razvan Bunescu, Ph.D. (Committee Member)
111 p.
Astronomy; Astrophysics
supernovae; SN 2008es; SN 2015bn; circumstellar interaction; magnetar spindow; dust; X-rays

Recommended Citations

Citations

  • Bhirombhakdi, K. (2019). Light Curve Powering Mechanisms of Superluminous Supernovae [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145

    APA Style (7th edition)

  • Bhirombhakdi, Kornpob. Light Curve Powering Mechanisms of Superluminous Supernovae. 2019. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145.

    MLA Style (8th edition)

  • Bhirombhakdi, Kornpob. "Light Curve Powering Mechanisms of Superluminous Supernovae." Doctoral dissertation, Ohio University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553512510511145

    Chicago Manual of Style (17th edition)

ohiou1553512510511145
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© 2019, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.