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On the Origin of SN...
On the Origin of SN 2016hil-A Type II Supernova in the Remote Outskirts of an Elliptical Host
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Irani, Ido (author)
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Schulze, Steve (author)
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Gal-Yam, Avishay (author)
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- Lunnan, Ragnhild (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Brink, Thomas G. (author)
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Zheng, WeiKang (author)
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Filippenko, Alexei V. (author)
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- Yang, Yi (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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de Jaeger, Thomas (author)
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Nugent, Peter E. (author)
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Kasliwal, Mansi M. (author)
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Fremling, Christoffer (author)
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Neill, James Don (author)
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Rebbapragada, Umaa (author)
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Masci, Frank J. (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Yaron, Ofer (author)
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(creator_code:org_t)
- 2019-12-16
- 2019
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 887:2
- Related links:
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https://iopscience.i...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- Type II supernovae (SNe) stem from the core collapse of massive (>8 M-circle dot) stars. Due to their short lifespan, we expect a very low rate of such events in elliptical hosts, where the star formation rate is low, and which are mostly comprised of an old stellar population. SN 2016hil (iPTF16hil) is an SN II located in the extreme outskirts of an elliptical galaxy at z.=.0.0608 (projected distance 27.2 kpc). It was detected near peak (M-r similar to -17 mag) 9 days after the last non-detection. The event has some potentially peculiar properties: it presented an apparently double-peaked light curve, and its spectra suggest low metallicity content (Z < 0.4 Z(circle dot)). We place a tentative upper limit on the mass of a potential faint host at log M/M-circle dot = 7.27(-0.24)(+0.43) using deep optical imaging from Keck/LRIS. In light of this, we discuss the possibility of the progenitor forming locally and other more exotic formation scenarios such as a merger or common-envelope evolution causing a time-delayed explosion. Further observations of the explosion site in the UV are needed in order to distinguish between the cases. Regardless of the origin of the transient, observing a population of such seemingly hostless SNe II could have many uses, including an estimate the amount of faint galaxies in a given volume, and tests of the prediction of a time-delayed population of core-collapse SNe in locations otherwise unfavorable for the detection of such events.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Core-collapse supernovae
- Elliptical galaxies
- Dwarf galaxies
- Early-type galaxies
- Binary stars
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Irani, Ido
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Schulze, Steve
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Gal-Yam, Avishay
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Lunnan, Ragnhild
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Brink, Thomas G.
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Zheng, WeiKang
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show more...
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Filippenko, Alex ...
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Yang, Yi
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de Jaeger, Thoma ...
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Nugent, Peter E.
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Kasliwal, Mansi ...
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Fremling, Christ ...
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Neill, James Don
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Rebbapragada, Um ...
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Masci, Frank J.
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Sollerman, Jespe ...
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Yaron, Ofer
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Stockholm University