J/ApJ/917/97ivo://CDS.VizieR/J/ApJ/917/97doi:10.26093/cds/vizier.19170097CDSWang X.Lin W.Zhang J.Zhang T.Cai Y.Zhang K.Filippenko A.V.,Graham M.Maeda K.Mo J.Xiang D.Xi G.Yan S.Wang L.Wang L.,Kawabata K.Zhai Q.2023-05-26T09:12:16Z2023-02-17T14:03:15ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomyspectroscopyASASSN-14ms may represent the most luminous Type Ibn supernova (SNIbn) ever detected, with an absolute U-band magnitude brighter than -22.0mag and a total bolometric luminosity >1.0x10^44^erg/s near maximum light. The early-time spectra of this SN are characterized by a blue continuum on which are superimposed narrow P Cygni profile lines of HeI, suggesting the presence of slowly moving (~1000km/s), He-rich circumstellar material (CSM). At 1-2 months after maximum brightness, the HeI line profiles become only slightly broader, with blueshifted velocities of 2000-3000km/s, consistent with the CSM shell being continuously accelerated by the SN light and ejecta. Like most SNe Ibn, the light curves of ASASSN-14ms show rapid post-peak evolution, dropping by ~7mag in the V band over three months. Such a rapid post-peak decline and high luminosity can be explained by interaction between SN ejecta and helium-rich CSM of 0.9M_{sun}_ at a distance of ~10^15^cm. The CSM around ASASSN-14ms is estimated to originate from a pre-explosion event with a mass-loss rate of 6.7M_{sun}_/yr (assuming a velocity of ~1000km/s), which is consistent with abundant He-rich material violently ejected during the late Wolf-Rayet (WN9-11 or Opfe) stage. After examining the light curves for a sample of SNe Ibn, we find that the more luminous ones tend to have slower post-peak decline rates, reflecting that the observed differences may arise primarily from discrepancies in the CSM distribution around the massive progenitors.2021ApJ...917...97Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/917/97CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/5 : UBV Photometry of Bright Stars (Johnson+ 1966)J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)J/MNRAS/416/3138 : SN 2009jf light curves (Valenti+, 2011)J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)J/MNRAS/449/1921 : UV/optical/NIR phot. for Type Ibn SNe (Pastorello+, 2015)J/MNRAS/453/3649 : Photometric data for ASASSN-15ed (Pastorello+, 2015)J/MNRAS/449/1941 : Optical/NIR phot. of OGLE-2012-SN-006 (Pastorello+, 2015)J/A+A/579/A40 : PESSTO catalog (Smartt+, 2015)J/A+A/580/A131 : Circumstellar-interacting supernovae (Taddia+, 2015)J/A+A/602/A93 : SN Type Ibn OGLE-2014-SN-131 LCs (Karamehmetoglu+, 2017)J/ApJ/835/58 : PTF 12dam & iPTF 13dcc follow-up (Vreeswijk+, 2017)J/ApJ/910/42 : LCs and spectroscopic obs. of AT2018cow (Xiang+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/917/97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/917/97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/917/97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/917/97https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/917/97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/917/97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/917/97/table4Journal of spectroscopic observations of ASASSN-14msDateDate of observation (UT)time.epochnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[7021.36/7194.9] Julian Date; JD-2450000dtime.epochfloatPhase[-2.49/171.05] Phase relative to the epoch of V-band maximum (JD=2457023.85)dtime.intervalfloatExp[1200/3600] Exposure timestime.duration;obs.exposureintTelTelescope+InstrumentinstrcharLam1[3000/4000] Lower wavelength range in {AA}0.1nmem.wl;stat.minintLam2[8750/10000] Upper wavelength range in {AA}0.1nmem.wl;stat.maxintFileName of the ASCII file in subdirectory "sp"meta.id;meta.filecharSpInteractive spectrum plotmeta.ref.urlchar