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Helium-rich Superlu...
Helium-rich Superluminous Supernovae from the Zwicky Transient Facility
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Yan, Lin (author)
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Perley, D. A. (author)
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Schulze, S. (author)
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show more...
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- Lunnan, Ragnhild (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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De, K. (author)
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Chen, Z. H. (author)
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Fremling, C. (author)
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Gal-Yam, A. (author)
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Taggart, K. (author)
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- Chen, Ting-Wan (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Andreoni, I. (author)
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Bellm, E. C. (author)
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Cunningham, V. (author)
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Dekany, R. (author)
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Duev, D. A. (author)
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- Fransson, Claes (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Laher, R. R. (author)
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Hankins, M. (author)
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Ho, A. Y. Q. (author)
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Jencson, J. E. (author)
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Kaye, S. (author)
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Kulkarni, S. R. (author)
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Kasliwal, M. M. (author)
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Golkhou, V. Z. (author)
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Graham, M. (author)
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Masci, F. J. (author)
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Miller, A. A. (author)
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Neill, J. D. (author)
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Ofek, E. (author)
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Porter, M. (author)
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Mroz, P. (author)
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Reiley, D. (author)
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Riddle, R. (author)
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Rigault, M. (author)
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Rusholme, B. (author)
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Shupe, D. L. (author)
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Soumagnac, M. T. (author)
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Smith, R. (author)
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- Tartaglia, Leonardo (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Yao, Y. (author)
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Yaron, O. (author)
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(creator_code:org_t)
- 2020-10-07
- 2020
- English.
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In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 902:1
- 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
Close
- Helium is expected to be present in the massive ejecta of some hydrogen-poor superluminous supernovae (SLSN-I). However, until now only one event has been identified with He features in its photospheric spectra (PTF10hgi). We present the discovery of a new He-rich SLSN-I, ZTF19aawfbtg (SN2019hge), atz = 0.0866. This event has more than 10 optical spectra at phases from -41 to +103 days relative to the peak, most of which match well with that of PTF10hgi. Confirmation comes from a near-IR spectrum taken at +34 days, revealing Heifeatures with P-Cygni profiles at 1.083 and 2.058 mu m. Using the optical spectra of PTF10hgi and SN2019hge as templates, we examined 70 other SLSNe-I discovered by Zwicky Transient Facility in the first two years of operation and found five additional SLSNe-I with distinct He-features. The excitation of Heiatoms in normal core-collapse supernovae requires nonthermal radiation, as proposed by previous studies. These He-rich events cannot be explained by the traditional(56)Ni mixing model because of their blue spectra, high peak luminosities, and long rise timescales. Magnetar models offer a possible solution since pulsar winds naturally generate high-energy particles, potential sources of nonthermal excitation. An alternative model is the interaction between the ejecta and dense H-poor circumstellar material, which may be supported by observed undulations in the light curves. These six SLSNe-Ib have relatively low-peak luminosities (rest frameM(g) = -20.06 0.16).
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Supernovae
- Type Ib supernovae
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Yan, Lin
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Perley, D. A.
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Schulze, S.
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Lunnan, Ragnhild
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Sollerman, Jespe ...
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De, K.
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show more...
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Chen, Z. H.
-
Fremling, C.
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Gal-Yam, A.
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Taggart, K.
-
Chen, Ting-Wan
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Andreoni, I.
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Bellm, E. C.
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Cunningham, V.
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Dekany, R.
-
Duev, D. A.
-
Fransson, Claes
-
Laher, R. R.
-
Hankins, M.
-
Ho, A. Y. Q.
-
Jencson, J. E.
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Kaye, S.
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Kulkarni, S. R.
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Kasliwal, M. M.
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Golkhou, V. Z.
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Graham, M.
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Masci, F. J.
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Miller, A. A.
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Neill, J. D.
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Ofek, E.
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Porter, M.
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Mroz, P.
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Reiley, D.
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Riddle, R.
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Rigault, M.
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Rusholme, B.
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Shupe, D. L.
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Soumagnac, M. T.
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Smith, R.
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Tartaglia, Leona ...
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Yao, Y.
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Yaron, O.
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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