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  SN 2017gmr: An energetic type II-P supernova with asymmetries

Andrews, J. E., Sand, D. J., Valenti, S., Smith, N., Dastidar, R., Sahu, D. K., et al. (2019). SN 2017gmr: An energetic type II-P supernova with asymmetries. The Astrophysical Journal, 885(1): 43. doi:10.3847/1538-4357/ab43e3.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-A194-D Version Permalink: http://hdl.handle.net/21.11116/0000-0005-A195-C
Genre: Journal Article

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 Creators:
Andrews, Jennifer E., Author
Sand, D. J., Author
Valenti, S., Author
Smith, Nathan, Author
Dastidar, Raya, Author
Sahu, D. K., Author
Misra, Kuntal, Author
Singh, Avinash, Author
Hiramatsu, D., Author
Brown, P. J., Author
Hosseinzadeh, G., Author
Wyatt, S., Author
Vinko, J., Author
Anupama, G. C., Author
Arcavi, I., Author
Ashall, Chris, Author
Benetti, S., Author
Berton, Marco, Author
Bostroem, K. A., Author
Bulla, M., Author
Burke, J., AuthorChen, S., AuthorChomiuk, L., AuthorCikota, A., AuthorCongiu, E., AuthorCseh, B., AuthorDavis, Scott, AuthorElias-Rosa, N., AuthorFaran, T., AuthorFraser, Morgan, AuthorGalbany, L., AuthorGall, C., AuthorGal-Yam, A., AuthorGangopadhyay, Anjasha, AuthorGromadzki, M., AuthorHaislip, J., AuthorHowell, D. A., AuthorHsiao, E. Y., AuthorInserra, C., AuthorKankare, E., AuthorKuncarayakti, H., AuthorKouprianov, V., AuthorKumar, Brajesh, AuthorLi, Xue, AuthorLin, Han, AuthorMaguire, K., AuthorMazzali, P.1, Author              McCully, C., AuthorMilne, P., AuthorMo, Jun, AuthorMorrell, N., AuthorNicholl, M., AuthorOchner, P., AuthorOlivares, F., AuthorPastorello, A., AuthorPatat, F., AuthorPhillips, M., AuthorPignata, G., AuthorPrentice, S., AuthorReguitti, A., AuthorReichart, D. E., AuthorRodríguez, Ó., AuthorRui, Liming, AuthorSanwal, Pankaj, AuthorSárneczky, K., AuthorShahbandeh, M., AuthorSingh, Mridweeka, AuthorSmartt, S., AuthorStrader, J., AuthorStritzinger, M. D., AuthorSzakáts, R., AuthorTartaglia, L., AuthorWang, Huijuan, AuthorWang, Lingzhi, AuthorWang, Xiaofeng, AuthorWheeler, J. C., AuthorXiang, Danfeng, AuthorYaron, O., AuthorYoung, D. R., AuthorZhang, Junbo, Author more..
Affiliations:
1Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              

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 Abstract: We present high-cadence UV, optical, and near-infrared data on the luminous Type II-P supernova SN 2017gmr from hours after discovery through the first 180 days. SN 2017gmr does not show signs of narrow, high-ionization emission lines in the early optical spectra, yet the optical light-curve evolution suggests that an extra energy source from circumstellar medium (CSM) interaction must be present for at least 2 days after explosion. Modeling of the early light curve indicates a ~500 R progenitor radius, consistent with a rather compact red supergiant, and late-time luminosities indicate that up to 0.130 ± 0.026 M of 56Ni are present, if the light curve is solely powered by radioactive decay, although the 56Ni mass may be lower if CSM interaction contributes to the post-plateau luminosity. Prominent multipeaked emission lines of Hα and [O i] emerge after day 154, as a result of either an asymmetric explosion or asymmetries in the CSM. The lack of narrow lines within the first 2 days of explosion in the likely presence of CSM interaction may be an example of close, dense, asymmetric CSM that is quickly enveloped by the spherical supernova ejecta.

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 Dates: 2019-10-29
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.3847/1538-4357/ab43e3
Other: LOCALID: 3192581
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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 885 (1) Sequence Number: 43 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3