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 |
Files in This Item:
File | Description | Size | Format | |
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stac744_part-1.pdf | first part | 8.81 MB | Adobe PDF | View/Open |
stac744_part-2.pdf | second part | 9.63 MB | Adobe PDF | View/Open |
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