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An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi

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An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi. / Gagliano, Alexander; Izzo, Luca; Kilpatrick, Charles D. et al.
In: The Astrophysical Journal, Vol. 924, No. 2, 55, 10.01.2022.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Gagliano, A, Izzo, L, Kilpatrick, CD, Mockler, B, Jacobson-Galán, WV, Terreran, G, Dimitriadis, G, Zenati, Y, Auchettl, K, Drout, MR, Narayan, G, Foley, RJ, Margutti, R, Rest, A, Jones, DO, Aganze, C, Aleo, PD, Burgasser, AJ, Coulter, DA, Gerasimov, R, Gall, C, Hjorth, J, Hsu, C-C, Magnier, EA, Mandel, KS, Piro, AL, Rojas-Bravo, C, Siebert, MR, Stacey, H, Stroh, MC, Swift, JJ, Taggart, K & Tinyanont, S 2022, 'An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi', The Astrophysical Journal, vol. 924, no. 2, 55. https://doi.org/10.3847/1538-4357/ac35ec

APA

Gagliano, A., Izzo, L., Kilpatrick, C. D., Mockler, B., Jacobson-Galán, W. V., Terreran, G., Dimitriadis, G., Zenati, Y., Auchettl, K., Drout, M. R., Narayan, G., Foley, R. J., Margutti, R., Rest, A., Jones, D. O., Aganze, C., Aleo, P. D., Burgasser, A. J., Coulter, D. A., ... Tinyanont, S. (2022). An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi. The Astrophysical Journal, 924(2), Article 55. https://doi.org/10.3847/1538-4357/ac35ec

Vancouver

Gagliano A, Izzo L, Kilpatrick CD, Mockler B, Jacobson-Galán WV, Terreran G et al. An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi. The Astrophysical Journal. 2022 Jan 10;924(2):55. doi: 10.3847/1538-4357/ac35ec

Author

Gagliano, Alexander ; Izzo, Luca ; Kilpatrick, Charles D. et al. / An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi. In: The Astrophysical Journal. 2022 ; Vol. 924, No. 2.

Bibtex

@article{fd046e228d9e4de19de2727f5490408f,
title = "An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi",
abstract = "We present photometric and spectroscopic observations of Supernova 2020oi (SN 2020oi), a nearby (∼17 Mpc) type-Ic supernova (SN Ic) within the grand-design spiral M100. We undertake a comprehensive analysis to characterize the evolution of SN 2020oi and constrain its progenitor system. We detect flux in excess of the fireball rise model δ t ≈ 2.5 days from the date of explosion in multiband optical and UV photometry from the Las Cumbres Observatory and the Neil Gehrels Swift Observatory, respectively. The derived SN bolometric luminosity is consistent with an explosion with M ej = 0.81 ± 0.03 M o˙, E k = 0.79 ± 0.09 × 1051 erg s-1, and M Ni56 = 0.08 ± 0.02 M o˙. Inspection of the event's decline reveals the highest Δm 15,bol reported for a stripped-envelope event to date. Modeling of optical spectra near event peak indicates a partially mixed ejecta comparable in composition to the ejecta observed in SN 1994I, while the earliest spectrum shows signatures of a possible interaction with material of a distinct composition surrounding the SN progenitor. Further, Hubble Space Telescope pre-explosion imaging reveals a stellar cluster coincident with the event. From the cluster photometry, we derive the mass and age of the SN progenitor using stellar evolution models implemented in the BPASS library. Our results indicate that SN 2020oi occurred in a binary system from a progenitor of mass M ZAMS ≈ 9.5 ± 1.0 M o˙, corresponding to an age of 27 ± 7 Myr. SN 2020oi is the dimmest SN Ic event to date for which an early-time flux excess has been observed, and the first in which an early excess is unlikely to be associated with shock cooling.",
author = "Alexander Gagliano and Luca Izzo and Kilpatrick, {Charles D.} and Brenna Mockler and Jacobson-Gal{\'a}n, {Wynn Vicente} and Giacomo Terreran and Georgios Dimitriadis and Yossef Zenati and Katie Auchettl and Drout, {Maria R.} and Gautham Narayan and Foley, {Ryan J.} and R. Margutti and Armin Rest and Jones, {D. O.} and Christian Aganze and Aleo, {Patrick D.} and Burgasser, {Adam J.} and Coulter, {D. A.} and Roman Gerasimov and Christa Gall and Jens Hjorth and Chih-Chun Hsu and Magnier, {Eugene A.} and Mandel, {Kaisey S.} and Piro, {Anthony L.} and C{\'e}sar Rojas-Bravo and Siebert, {Matthew R.} and Holland Stacey and Stroh, {Michael Cullen} and Swift, {Jonathan J.} and Kirsty Taggart and Samaporn Tinyanont",
year = "2022",
month = jan,
day = "10",
doi = "10.3847/1538-4357/ac35ec",
language = "English",
volume = "924",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi

AU - Gagliano, Alexander

AU - Izzo, Luca

AU - Kilpatrick, Charles D.

AU - Mockler, Brenna

AU - Jacobson-Galán, Wynn Vicente

AU - Terreran, Giacomo

AU - Dimitriadis, Georgios

AU - Zenati, Yossef

AU - Auchettl, Katie

AU - Drout, Maria R.

AU - Narayan, Gautham

AU - Foley, Ryan J.

AU - Margutti, R.

AU - Rest, Armin

AU - Jones, D. O.

AU - Aganze, Christian

AU - Aleo, Patrick D.

AU - Burgasser, Adam J.

AU - Coulter, D. A.

AU - Gerasimov, Roman

AU - Gall, Christa

AU - Hjorth, Jens

AU - Hsu, Chih-Chun

AU - Magnier, Eugene A.

AU - Mandel, Kaisey S.

AU - Piro, Anthony L.

AU - Rojas-Bravo, César

AU - Siebert, Matthew R.

AU - Stacey, Holland

AU - Stroh, Michael Cullen

AU - Swift, Jonathan J.

AU - Taggart, Kirsty

AU - Tinyanont, Samaporn

PY - 2022/1/10

Y1 - 2022/1/10

N2 - We present photometric and spectroscopic observations of Supernova 2020oi (SN 2020oi), a nearby (∼17 Mpc) type-Ic supernova (SN Ic) within the grand-design spiral M100. We undertake a comprehensive analysis to characterize the evolution of SN 2020oi and constrain its progenitor system. We detect flux in excess of the fireball rise model δ t ≈ 2.5 days from the date of explosion in multiband optical and UV photometry from the Las Cumbres Observatory and the Neil Gehrels Swift Observatory, respectively. The derived SN bolometric luminosity is consistent with an explosion with M ej = 0.81 ± 0.03 M o˙, E k = 0.79 ± 0.09 × 1051 erg s-1, and M Ni56 = 0.08 ± 0.02 M o˙. Inspection of the event's decline reveals the highest Δm 15,bol reported for a stripped-envelope event to date. Modeling of optical spectra near event peak indicates a partially mixed ejecta comparable in composition to the ejecta observed in SN 1994I, while the earliest spectrum shows signatures of a possible interaction with material of a distinct composition surrounding the SN progenitor. Further, Hubble Space Telescope pre-explosion imaging reveals a stellar cluster coincident with the event. From the cluster photometry, we derive the mass and age of the SN progenitor using stellar evolution models implemented in the BPASS library. Our results indicate that SN 2020oi occurred in a binary system from a progenitor of mass M ZAMS ≈ 9.5 ± 1.0 M o˙, corresponding to an age of 27 ± 7 Myr. SN 2020oi is the dimmest SN Ic event to date for which an early-time flux excess has been observed, and the first in which an early excess is unlikely to be associated with shock cooling.

AB - We present photometric and spectroscopic observations of Supernova 2020oi (SN 2020oi), a nearby (∼17 Mpc) type-Ic supernova (SN Ic) within the grand-design spiral M100. We undertake a comprehensive analysis to characterize the evolution of SN 2020oi and constrain its progenitor system. We detect flux in excess of the fireball rise model δ t ≈ 2.5 days from the date of explosion in multiband optical and UV photometry from the Las Cumbres Observatory and the Neil Gehrels Swift Observatory, respectively. The derived SN bolometric luminosity is consistent with an explosion with M ej = 0.81 ± 0.03 M o˙, E k = 0.79 ± 0.09 × 1051 erg s-1, and M Ni56 = 0.08 ± 0.02 M o˙. Inspection of the event's decline reveals the highest Δm 15,bol reported for a stripped-envelope event to date. Modeling of optical spectra near event peak indicates a partially mixed ejecta comparable in composition to the ejecta observed in SN 1994I, while the earliest spectrum shows signatures of a possible interaction with material of a distinct composition surrounding the SN progenitor. Further, Hubble Space Telescope pre-explosion imaging reveals a stellar cluster coincident with the event. From the cluster photometry, we derive the mass and age of the SN progenitor using stellar evolution models implemented in the BPASS library. Our results indicate that SN 2020oi occurred in a binary system from a progenitor of mass M ZAMS ≈ 9.5 ± 1.0 M o˙, corresponding to an age of 27 ± 7 Myr. SN 2020oi is the dimmest SN Ic event to date for which an early-time flux excess has been observed, and the first in which an early excess is unlikely to be associated with shock cooling.

U2 - 10.3847/1538-4357/ac35ec

DO - 10.3847/1538-4357/ac35ec

M3 - Journal article

VL - 924

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 55

ER -