J/A+A/666/A79ivo://CDS.VizieR/J/A+A/666/A79doi:10.26093/cds/vizier.36660079CDSFransson C.Sollerman J.Strotjohann N.L.Yang S.Schulze S.,Barbarino C.Kool E.C.Ofek E.O.Crellin-Quick A.De K.Drake A.J.,Fremling C.Gal-Yam A.Ho A.Y.Q.Kasliwal M.M.2022-10-12T12:16:47Z2022-10-07T09:27:13ZCDS support team

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

cds-question@unistra.frsupernovaephotometryvisible-astronomyspectroscopyinfrared-astronomyWe present photometric and spectroscopic observations of the Type IIn supernova SN 2019zrk (a.k.a. ZTF 20aacbyec). The SN shows a >~100 day precursor, with a slow rise, followed by a rapid rise to M~-19.2 in the r and g bands. The post-peak light-curve decline is well fitted with an exponential decay with a time scale of ~39 days, but shows prominent undulations, with an amplitude of ~1mag. Both the light curve and spectra are dominated by interaction with a dense circumstellar medium (CSM), probably from previous mass ejections. The spectra evolves from a scattering-dominated Type IIn spectrum to a spectrum with strong P-Cygni absorptions. The expansion velocity is high, ~16000km/s, even in the last spectra. The last spectrum ~110 days after the main eruption reveals no evidence for advanced nucleosynthesis. From analysis of the spectra and light curves we estimate the mass-loss rate to be ~4x10^-2^M_{sun}_/yr for a CSM velocity of 100km/s, and a CSM mass of >~1M_{sun}_. We find strong similarities of both the precursor, general light curve and spectral evolution with SN 2009ip and similar SNe, although SN 2019zrk displays a brighter peak magnitude. Different scenarios for the nature of the 09ip-class of SNe, based on pulsational pair instability eruptions, wave heating and mergers, are discussed.2022A&A...666A..79Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/666/A79CatalogResearchIsServedByTAP VizieR generic servicerelated-tohttps://www.wiserep.org/object/14173 : SN2019zrk spectra on WISeREPhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/666/A79https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/666/A79http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/666/A79https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/666/A79https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/666/A79http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/666/A79GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/666/A79/photomPhotometry of SN 2019zrk (table 1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Datedtime.epochdoubleFilter[ugriz] Filter namemeta.id;instr.filtercharPhase[-96.49/377.28] Rest Frame Phasedtime.phasefloatmag? Apparent magnitude in Filtermagphot.magfloatnullablee_mag? Error of magnitude in Filtermagstat.error;phot.magfloatnullablelimmag? Limiting magnitude in Filtermagphot.magfloatnullableMAGAbsolute magnitude in Filtermagphys.magAbsfloatInstInstrument namemeta.id;instrcharJ/A+A/666/A79/listspList of spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintspShow the spectrummeta.ref.urlcharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharInstInstrumentmeta.id;instrcharObs.dateObservation datetime.epoch;obsnullableblambdaLower value of wavelength interval0.1nmem.wl;stat.minfloatBlambdaUpper value of wavelength interval0.1nmem.wl;stat.maxdouble