A Long-duration Luminous Type IIn Supernova KISS15s: Strong Recombination Lines from the Inhomogeneous Ejecta–CSM Interaction Region and Hot Dust Emission from Newly Formed Dust
Abstract
We discuss the discovery of an SN 1988Z–like type IIn supernova KISS15s found in a low-mass star-forming galaxy at redshift z = 0.038 during the course of the Kiso Supernova Survey (KISS). KISS15s shows long-duration optical continuum and emission line light curves, suggesting that KISS15s is powered by a continuous interaction between the expanding ejecta and dense circumstellar medium (CSM). The Hα emission line profile can be decomposed into four Gaussians of narrow, intermediate, blueshifted intermediate, and broad velocity width components, with a full width at half maximum of lesssim100, ~2000, and ~14,000 km s–1 for the narrow, intermediate, and broad components, respectively. The presence of the blueshifted intermediate component, of which the line-of-sight velocity relative to the systemic velocity is about –5000 km s–1, suggests that the ejecta-CSM interaction region has an inhomogeneous morphology and anisotropic expansion velocity. We found that KISS15s shows increasing infrared continuum emission, which can be interpreted as hot dust thermal emission of T ~ 1200 K from newly formed dust in a cool, dense shell in the ejecta-CSM interaction region. The progenitor mass-loss rate, inferred from bolometric luminosity, is $$\dot{M}\sim 0.4\,{M}_{\odot }\,{\mathrm{yr}}^{-1}\,({v}_{w}/40\,\mathrm{km}\,{{\rm{s}}}^{-1})$$, where v w is the progenitor's stellar wind velocity. This implies that the progenitor of KISS15s was a red supergiant star or a luminous blue variable that had experienced a large mass loss in the centuries before the explosion.
- Authors:
-
- Tohoku Univ., Sendai (Japan)
- Univ. of Tokyo (Japan)
- Univ. of Tokyo (Japan); Konan Univ., Kobe (Japan)
- National Inst. of Natural Sciences, Tokyo (Japan)
- Univ. of Washington, Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
- OSTI Identifier:
- 1544085
- Grant/Contract Number:
- AC02-05CH1123
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 872; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; circumstellar matter; stars: mass-loss; supernovae: general; supernovae: individual (KISS15s, 1988Z)
Citation Formats
Kokubo, Mitsuru, Mitsuda, Kazuma, Morokuma, Tomoki, Tominaga, Nozomu, Tanaka, Masaomi, Moriya, Takashi J., Yoachim, Peter, Ivezić, Željko, Sako, Shigeyuki, and Doi, Mamoru. A Long-duration Luminous Type IIn Supernova KISS15s: Strong Recombination Lines from the Inhomogeneous Ejecta–CSM Interaction Region and Hot Dust Emission from Newly Formed Dust. United States: N. p., 2019.
Web. doi:10.3847/1538-4357/aaff6b.
Kokubo, Mitsuru, Mitsuda, Kazuma, Morokuma, Tomoki, Tominaga, Nozomu, Tanaka, Masaomi, Moriya, Takashi J., Yoachim, Peter, Ivezić, Željko, Sako, Shigeyuki, & Doi, Mamoru. A Long-duration Luminous Type IIn Supernova KISS15s: Strong Recombination Lines from the Inhomogeneous Ejecta–CSM Interaction Region and Hot Dust Emission from Newly Formed Dust. United States. https://doi.org/10.3847/1538-4357/aaff6b
Kokubo, Mitsuru, Mitsuda, Kazuma, Morokuma, Tomoki, Tominaga, Nozomu, Tanaka, Masaomi, Moriya, Takashi J., Yoachim, Peter, Ivezić, Željko, Sako, Shigeyuki, and Doi, Mamoru. Tue .
"A Long-duration Luminous Type IIn Supernova KISS15s: Strong Recombination Lines from the Inhomogeneous Ejecta–CSM Interaction Region and Hot Dust Emission from Newly Formed Dust". United States. https://doi.org/10.3847/1538-4357/aaff6b. https://www.osti.gov/servlets/purl/1544085.
@article{osti_1544085,
title = {A Long-duration Luminous Type IIn Supernova KISS15s: Strong Recombination Lines from the Inhomogeneous Ejecta–CSM Interaction Region and Hot Dust Emission from Newly Formed Dust},
author = {Kokubo, Mitsuru and Mitsuda, Kazuma and Morokuma, Tomoki and Tominaga, Nozomu and Tanaka, Masaomi and Moriya, Takashi J. and Yoachim, Peter and Ivezić, Željko and Sako, Shigeyuki and Doi, Mamoru},
abstractNote = {We discuss the discovery of an SN 1988Z–like type IIn supernova KISS15s found in a low-mass star-forming galaxy at redshift z = 0.038 during the course of the Kiso Supernova Survey (KISS). KISS15s shows long-duration optical continuum and emission line light curves, suggesting that KISS15s is powered by a continuous interaction between the expanding ejecta and dense circumstellar medium (CSM). The Hα emission line profile can be decomposed into four Gaussians of narrow, intermediate, blueshifted intermediate, and broad velocity width components, with a full width at half maximum of lesssim100, ~2000, and ~14,000 km s–1 for the narrow, intermediate, and broad components, respectively. The presence of the blueshifted intermediate component, of which the line-of-sight velocity relative to the systemic velocity is about –5000 km s–1, suggests that the ejecta-CSM interaction region has an inhomogeneous morphology and anisotropic expansion velocity. We found that KISS15s shows increasing infrared continuum emission, which can be interpreted as hot dust thermal emission of T ~ 1200 K from newly formed dust in a cool, dense shell in the ejecta-CSM interaction region. The progenitor mass-loss rate, inferred from bolometric luminosity, is $\dot{M}\sim 0.4\,{M}_{\odot }\,{\mathrm{yr}}^{-1}\,({v}_{w}/40\,\mathrm{km}\,{{\rm{s}}}^{-1})$, where v w is the progenitor's stellar wind velocity. This implies that the progenitor of KISS15s was a red supergiant star or a luminous blue variable that had experienced a large mass loss in the centuries before the explosion.},
doi = {10.3847/1538-4357/aaff6b},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 872,
place = {United States},
year = {Tue Feb 19 00:00:00 EST 2019},
month = {Tue Feb 19 00:00:00 EST 2019}
}
Web of Science
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Works referencing / citing this record:
Supernova Ejecta Interacting with a Circumstellar Disk. I. Two-dimensional Radiation-hydrodynamic Simulations
journal, December 2019
- Suzuki, Akihiro; Moriya, Takashi J.; Takiwaki, Tomoya
- The Astrophysical Journal, Vol. 887, Issue 2