J/ApJ/882/L15ivo://CDS.VizieR/J/ApJ/882/L15doi:10.26093/cds/vizier.18829015CDSSingh A.Sahu D.K.Anupama G.C.Kumar B.Kumar H.Yamanaka M.,Baklanov P.V.Tominaga N.Blinnikov S.I.Maeda K.Dutta A.Bhalerao V.,Anche R.M.Barway S.Akitaya H.Nakaoka T.Kawabata M.Kawabata K.S.,Sasada M.Takagi K.Maehara H.Isogai K.Kino M.Taguchi K.Nagao T.2021-04-27T12:05:20Z2021-03-08T12:01:36ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsupernovaeultraviolet-photometryinfrared-photometryvisible-astronomyWide-band photometryHigh-cadence ultraviolet, optical, and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The early-phase multiband light curves (LCs) exhibit the adiabatic cooling envelope emission following the shock breakout up to ~14 days from the explosion. SN 2018hna has a rise time of ~88 days in the V band, similar to SN 1987A. A ^56^Ni mass of ~0.087+/-0.004M_{sun}_ is inferred for SN 2018hna from its bolometric LC. Hydrodynamical modeling of the cooling phase suggests a progenitor with a radius ~50R_{sun}_, a mass of ~14-20M_{sun}_, and an explosion energy of ~1.7-2.9x10^51^erg. The smaller inferred radius of the progenitor than a standard red supergiant is indicative of a blue supergiant progenitor of SN 2018hna. A subsolar metallicity (~0.3Z_{sun}_) is inferred for the host galaxy UGC 07534, concurrent with the low-metallicity environments of 1987A-like events.2019ApJ...882L..15Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/882/L15CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/MNRAS/394/2266 : SN 2005cs one-year photometry (Pastorello+, 2009)J/A+A/537/A141 : UBVRI light curves of SN 2009E (Pastorello+, 2012)J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)J/MNRAS/431/308 : SN 2011fu BVRI light curves (Kumar+, 2013)J/ApJ/763/42 : X-ray emission from 28 SNe (IIn, Ibn or SLSN-I) (Ofek+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/882/L15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/882/L15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/882/L15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/882/L15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/882/L15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/882/L15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVOpticalInfrareddefaultJ/ApJ/882/L15/photData behind Figure 1 -- Photometric observations of SN 2018hnarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Daydtime.epochdoublePhase[3.8/256.9] Days since explosion; JD-2458411.3dtime.phasefloatFiltName of the Filter usedmeta.id;instr.setup;instr.filtercharmag[12.89/19.87] Magnitude, Vega Systemmagphot.magfloate_mag[0/0.7] 1-sigma errormagstat.error;phot.magfloatTelObserving telescope (1)instr.telcharInstInstrument usedinstr.setupcharJ/ApJ/882/L15/specList of Himalayan Chandra Telescope (HCT) HFOSC observation dates (Table added by CDS)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observation (UT)time.epochnullableSpInteractive plot of the spectrummeta.ref.urlchar