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

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cam.depositDate2022-02-02
cam.issuedOnline2022-01-12
cam.orpheus.success2022-02-03 - Embargo set during processing via Fast-track
dc.contributor.authorGagliano, A
dc.contributor.authorIzzo, L
dc.contributor.authorKilpatrick, CD
dc.contributor.authorMockler, B
dc.contributor.authorJacobson-Galán, WV
dc.contributor.authorTerreran, G
dc.contributor.authorDimitriadis, G
dc.contributor.authorZenati, Y
dc.contributor.authorAuchettl, K
dc.contributor.authorDrout, MR
dc.contributor.authorNarayan, G
dc.contributor.authorFoley, RJ
dc.contributor.authorMargutti, R
dc.contributor.authorRest, A
dc.contributor.authorJones, DO
dc.contributor.authorAganze, C
dc.contributor.authorAleo, PD
dc.contributor.authorBurgasser, AJ
dc.contributor.authorCoulter, DA
dc.contributor.authorGerasimov, R
dc.contributor.authorGall, C
dc.contributor.authorHjorth, J
dc.contributor.authorHsu, CC
dc.contributor.authorMagnier, EA
dc.contributor.authorMandel, KS
dc.contributor.authorPiro, AL
dc.contributor.authorRojas-Bravo, C
dc.contributor.authorSiebert, MR
dc.contributor.authorStacey, H
dc.contributor.authorStroh, MC
dc.contributor.authorSwift, JJ
dc.contributor.authorTaggart, K
dc.contributor.authorTinyanont, S
dc.contributor.orcidGagliano, A [0000-0003-4906-8447]
dc.contributor.orcidIzzo, L [0000-0001-9695-8472]
dc.contributor.orcidKilpatrick, CD [0000-0002-5740-7747]
dc.contributor.orcidMockler, B [0000-0001-6350-8168]
dc.contributor.orcidJacobson-Galán, WV [0000-0003-1103-3409]
dc.contributor.orcidTerreran, G [0000-0003-0794-5982]
dc.contributor.orcidDimitriadis, G [0000-0001-9494-179X]
dc.contributor.orcidAuchettl, K [0000-0002-4449-9152]
dc.contributor.orcidDrout, MR [0000-0001-7081-0082]
dc.contributor.orcidNarayan, G [0000-0001-6022-0484]
dc.contributor.orcidFoley, RJ [0000-0002-2445-5275]
dc.contributor.orcidMargutti, R [0000-0003-4768-7586]
dc.contributor.orcidRest, A [0000-0002-4410-5387]
dc.contributor.orcidJones, DO [0000-0002-6230-0151]
dc.contributor.orcidAganze, C [0000-0003-2094-9128]
dc.contributor.orcidAleo, PD [0000-0002-6298-1663]
dc.contributor.orcidBurgasser, AJ [0000-0002-6523-9536]
dc.contributor.orcidCoulter, DA [0000-0003-4263-2228]
dc.contributor.orcidGerasimov, R [0000-0003-0398-639X]
dc.contributor.orcidGall, C [0000-0002-8526-3963]
dc.contributor.orcidHjorth, J [0000-0002-4571-2306]
dc.contributor.orcidHsu, CC [0000-0002-5370-7494]
dc.contributor.orcidMagnier, EA [0000-0002-7965-2815]
dc.contributor.orcidMandel, KS [0000-0001-9846-4417]
dc.contributor.orcidPiro, AL [0000-0001-6806-0673]
dc.contributor.orcidRojas-Bravo, C [0000-0002-7559-315X]
dc.contributor.orcidSiebert, MR [0000-0003-2445-3891]
dc.contributor.orcidStroh, MC [0000-0002-3019-4577]
dc.contributor.orcidSwift, JJ [0000-0002-9486-818X]
dc.contributor.orcidTaggart, K [0000-0002-5748-4558]
dc.contributor.orcidTinyanont, S [0000-0002-1481-4676]
dc.date.accessioned2022-02-04T00:30:38Z
dc.date.available2022-02-04T00:30:38Z
dc.date.issued2022
dc.date.updated2022-02-02T18:01:20Z
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>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 <jats:italic>δ</jats:italic> <jats:italic>t</jats:italic> ≈ 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 <jats:italic>M</jats:italic> <jats:sub>ej</jats:sub> = 0.81 ± 0.03 <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>, <jats:italic>E</jats:italic> <jats:sub> <jats:italic>k</jats:italic> </jats:sub> = 0.79 ± 0.09 × 10<jats:sup>51</jats:sup> erg s<jats:sup>−1</jats:sup>, and <jats:italic>M</jats:italic> <jats:sub>Ni56</jats:sub> = 0.08 ± 0.02 <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>. Inspection of the event’s decline reveals the highest Δ<jats:italic>m</jats:italic> <jats:sub>15,bol</jats:sub> 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 <jats:monospace>BPASS</jats:monospace> library. Our results indicate that SN 2020oi occurred in a binary system from a progenitor of mass <jats:italic>M</jats:italic> <jats:sub>ZAMS</jats:sub> ≈ 9.5 ± 1.0 <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>, 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.</jats:p>
dc.identifier.doi10.17863/CAM.81034
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/333618
dc.language.isoeng
dc.publisherAmerican Astronomical Society
dc.publisher.departmentDepartment of Pure Mathematics And Mathematical Statistics
dc.publisher.urlhttp://dx.doi.org/10.3847/1538-4357/ac35ec
dc.rightsAll Rights Reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.subject5109 Space Sciences
dc.subject51 Physical Sciences
dc.subject5101 Astronomical Sciences
dc.titleAn Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi
dc.typeArticle
dcterms.dateAccepted2021-11-01
prism.issueIdentifier2
prism.numberARTN 55
prism.publicationDate2022
prism.publicationNameAstrophysical Journal
prism.volume924
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (101002652)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (873089)
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
pubs.licence-identifierapollo-deposit-licence-2-1
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.3847/1538-4357/ac35ec

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