Close, bright, and boxy: the superluminous SN 2018hti

Fiore, A.; Benetti, S.; Nicholl, M.; Reguitti, A.; Cappellaro, E.; Campana, S.; Bose, S.; Paraskeva, E.; Berger, E.; Bravo, T. M.; Burke, J.; Cai, Y.-Z.; Chen, T.-W.; Chen, P.; Ciolfi, R.; 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-Rosa, N.; Shahbandeh, M.; Schuldt, S.; Thomas, B. P.; Tomasella, L.; Vinkó, J.; Vogl, C.; Wheeler, J. C.; Young, D. R.

doi:10.1093/mnras/stac744

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Close, bright, and boxy: the superluminous SN 2018hti

Fiore, A., Benetti, S., Nicholl, M., Reguitti, A., Cappellaro, E., Campana, S., et al. (2022). Close, bright, and boxy: the superluminous SN 2018hti. Monthly Notices of the Royal Astronomical Society, 512(3), 4484-4502. doi:10.1093/mnras/stac744.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-530E-9 Version Permalink: https://hdl.handle.net/21.11116/0000-000B-530F-8

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A MeerKAT-meets-LOFAR study of MS 1455.0 + 2232 a 590 kiloparsec ‘mini’-halo in a sloshing cool-core cluster.pdf (Any fulltext), 5MB

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A MeerKAT-meets-LOFAR study of MS 1455.0 + 2232 a 590 kiloparsec ‘mini’-halo in a sloshing cool-core cluster.pdf

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Fiore, A., Author
Benetti, S., Author
Nicholl, M., Author
Reguitti, A., Author
Cappellaro, E., Author
Campana, S., Author
Bose, S., Author
Paraskeva, E., Author
Berger, E., Author
Bravo, T. M., Author
Burke, J., Author
Cai, Y.-Z., Author
Chen, T.-W., Author
Chen, P., Author
Ciolfi, R., Author
Dong, S., Author
Gomez, S., Author
Gromadzki, M., Author
Gutiérrez, C. P., Author
Hiramatsu, D., Author
Hosseinzadeh, G., AuthorHowell, D. A., AuthorJerkstrand, A., AuthorKankare, E., AuthorKozyreva, A.¹, Author Maguire, K., AuthorMcCully, C., AuthorOchner, P., AuthorPellegrino, C., AuthorPignata, G., AuthorPost, R. S., AuthorElias-Rosa, N., AuthorShahbandeh, M., AuthorSchuldt, S.², Author Thomas, B. P., AuthorTomasella, L., AuthorVinkó, J., AuthorVogl, C.¹, Author Wheeler, J. C., AuthorYoung, D. R., Author more..

Affiliations:
1Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882
2Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644

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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_⊙ of circumstellar material or a magnetar with a magnetic field of B_p∼ 1.3 × 10¹³ G, and initial period of P_spin∼ 1.8 ms. From the nebular spectrum modelling we infer that SN 2018hti likely results from the explosion of a ∼40M_⊙ progenitor star.

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Dates: Published Online: 2022-03-17

Publication Status: Published online

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Identifiers: DOI: 10.1093/mnras/stac744

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Title: Monthly Notices of the Royal Astronomical Society

Source Genre: Journal

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Pages: - Volume / Issue: 512 (3) Sequence Number: - Start / End Page: 4484 - 4502 Identifier: -