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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/34231
Title: Close, bright, and boxy: the superluminous SN 2018hti
Authors: Fiore, A.
BENETTI, Stefano 
Nicholl, M.
Reguitti, A.
CAPPELLARO, Enrico 
CAMPANA, Sergio 
Bose, S.
Paraskeva, E.
Berger, E.
Bravo, T. M.
Burke, J.
Cai, Y. -Z.
Chen, T. -W.
Chen, P.
CIOLFI, RICCARDO 
Dong, S.
Gomez, S.
Gromadzki, M.
Gutiérrez, C. P.
Hiramatsu, D.
Hosseinzadeh, G.
Howell, D. A.
Jerkstrand, A.
Kankare, E.
Kozyreva, A.
Maguire, K.
McCully, C.
Ochner, P.
Pellegrino, C.
Pignata, G.
Post, R. S.
ELIAS DE LA ROSA, NANCY DEL CARMEN 
Shahbandeh, M.
Schuldt, S.
Thomas, B. P.
TOMASELLA, Lina 
Vinkó, J.
Vogl, C.
Wheeler, J. C.
Young, D. R.
Issue Date: 2022
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 512
Issue: 3
First Page: 4484
Abstract: SN 2018hti was a very nearby (z = 0.0614) superluminous supernova with an exceedingly bright absolute magnitude of -21.7 mag in r band at maximum. The densely sampled pre-maximum light curves of SN 2018hti show a slow luminosity evolution and constrain the rise time to ~50 rest-frame d. We fitted synthetic light curves to the photometry to infer the physical parameters of the explosion of SN 2018hti for both the magnetar and the CSM-interaction scenarios. We conclude that one of two mechanisms could be powering the luminosity of SN 2018hti; interaction with ~10 M<SUB>⊙</SUB> of circumstellar material or a magnetar with a magnetic field of B<SUB>p</SUB>~ 1.3 × 10<SUP>13</SUP> G, and initial period of P<SUB>spin</SUB>~ 1.8 ms. From the nebular spectrum modelling we infer that SN 2018hti likely results from the explosion of a ${\sim}40\, \mathrm{M}_\odot$ progenitor star.
URI: http://hdl.handle.net/20.500.12386/34231
URL: https://academic.oup.com/mnras/article/512/3/4484/6549929
http://arxiv.org/abs/2111.07142v2
ISSN: 0035-8711
DOI: 10.1093/mnras/stac744
Bibcode ADS: 2022MNRAS.512.4484F
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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