onr:"swepub:oai:DiVA.org:su-187650"
Search: onr:"swepub:oai:DiVA.org:su-187650" > Helium-rich Superlu...
- 1 of 1
- Previous record
- Next record
- To hitlist
Helium-rich Superluminous Supernovae from the Zwicky Transient Facility
- Yan, Lin (author)
- Perley, D. A. (author)
- Schulze, S. (author)
- show more...
- De, K. (author)
- Chen, Z. H. (author)
- Fremling, C. (author)
- Gal-Yam, A. (author)
- Taggart, K. (author)
- Andreoni, I. (author)
- Bellm, E. C. (author)
- Cunningham, V. (author)
- Dekany, R. (author)
- Duev, D. A. (author)
- Laher, R. R. (author)
- Hankins, M. (author)
- Ho, A. Y. Q. (author)
- Jencson, J. E. (author)
- Kaye, S. (author)
- Kulkarni, S. R. (author)
- Kasliwal, M. M. (author)
- Golkhou, V. Z. (author)
- Graham, M. (author)
- Masci, F. J. (author)
- Miller, A. A. (author)
- Neill, J. D. (author)
- Ofek, E. (author)
- Porter, M. (author)
- Mroz, P. (author)
- Reiley, D. (author)
- Riddle, R. (author)
- Rigault, M. (author)
- Rusholme, B. (author)
- Shupe, D. L. (author)
- Soumagnac, M. T. (author)
- Smith, R. (author)
- Yao, Y. (author)
- Yaron, O. (author)
- show less...
- (creator_code:org_t)
- 2020-10-07
- 2020
- English.
- In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 902:1
- Journal article (peer-reviewed)
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
- Astrophysical Journal Letters (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Yan, Lin
- Perley, D. A.
- Schulze, S.
- Lunnan, Ragnhild
- Sollerman, Jespe ...
- De, K.
- show more...
- Chen, Z. H.
- Fremling, C.
- Gal-Yam, A.
- Taggart, K.
- Chen, Ting-Wan
- Andreoni, I.
- Bellm, E. C.
- Cunningham, V.
- Dekany, R.
- Duev, D. A.
- Fransson, Claes
- Laher, R. R.
- Hankins, M.
- Ho, A. Y. Q.
- Jencson, J. E.
- Kaye, S.
- Kulkarni, S. R.
- Kasliwal, M. M.
- Golkhou, V. Z.
- Graham, M.
- Masci, F. J.
- Miller, A. A.
- Neill, J. D.
- Ofek, E.
- Porter, M.
- Mroz, P.
- Reiley, D.
- Riddle, R.
- Rigault, M.
- Rusholme, B.
- Shupe, D. L.
- Soumagnac, M. T.
- Smith, R.
- Tartaglia, Leona ...
- Yao, Y.
- Yaron, O.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Astrophysical Jo ...
- By the university
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
