Massive stars exploding in a He-rich circumstellar medium - V. Observations of the slow-evolving SN Ibn OGLE-2012-SN-006

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dc.contributor.authorPastorello, A.
dc.contributor.authorWyrzykowski, L.
dc.contributor.authorValenti, S.
dc.contributor.authorPrieto, J. L.
dc.contributor.authorKozlowski, S.
dc.contributor.authorUdalski, A.
dc.contributor.authorElias-Rosa, N.
dc.contributor.authorMorales-Garoffolo, A.
dc.contributor.authorAnderson, J. P.
dc.contributor.authorBenetti, S.
dc.contributor.authorBersten, M.
dc.contributor.authorBotticella, M. T.
dc.contributor.authorCappellaro, E.
dc.contributor.authorFasano, G.
dc.contributor.authorFraser, M.
dc.contributor.authorGal-Yam, A.
dc.contributor.authorGillone, M.
dc.contributor.authorGraham, M. L.
dc.contributor.authorGreiner, J.
dc.contributor.authorHachinger, S.
dc.contributor.authorHowell, D. A.
dc.contributor.authorInserra, C.
dc.contributor.authorParrent, J.
dc.contributor.authorRau, A.
dc.contributor.authorSchulze, S.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorSmith, K. W.
dc.contributor.authorTuratto, M.
dc.contributor.authorYaron, O.
dc.contributor.authorYoung, D. R.
dc.contributor.authorKubiak, M.
dc.contributor.authorSzymanski, M. K.
dc.contributor.authorPietrzynski, G.
dc.contributor.authorSoszynski, I.
dc.contributor.authorUlaczyk, K.
dc.contributor.authorPoleski, R.
dc.contributor.authorPietrukowicz, P.
dc.contributor.authorSkowron, J.
dc.contributor.authorMroz, P.
dc.date.accessioned2025-01-23T21:36:44Z
dc.date.available2025-01-23T21:36:44Z
dc.date.issued2015
dc.description.abstractWe present optical observations of the peculiar Type Ibn supernova (SN Ibn) OGLE-2012-SN-006, discovered and monitored by the Optical Gravitational Lensing Experiment-IV survey, and spectroscopically followed by Public ESO Spectroscopic Survey of Transient Objects (PESSTO) at late phases. Stringent pre-discovery limits constrain the explosion epoch with fair precision to JD = 245 6203.8 +/- 4.0. The rise time to the I-band light-curve maximum is about two weeks. The object reaches the peak absolute magnitude M-I = -19.65 +/- 0.19 on JD = 245 6218.1 +/- 1.8. After maximum, the light curve declines for about 25 d with a rate of 4 mag (100 d)(-1). The symmetric I-band peak resembles that of canonical Type Ib/c supernovae (SNe), whereas SNe Ibn usually exhibit asymmetric and narrower early-time light curves. Since 25 d past maximum, the light curve flattens with a decline rate slower than that of the Co-56-Fe-56 decay, although at very late phases it steepens to approach that rate. However, other observables suggest that the match with the Co-56 decay rate is a mere coincidence, and the radioactive decay is not the main mechanism powering the light curve of OGLE-2012-SN-006. An early-time spectrum is dominated by a blue continuum, with only a marginal evidence for the presence of He I lines marking this SN type. This spectrum shows broad absorptions bluewards than 5000 angstrom, likely O II lines, which are similar to spectral features observed in superluminous SNe at early epochs. The object has been spectroscopically monitored by PESSTO from 90 to 180 d after peak, and these spectra show the typical features observed in a number of SN 2006jc-like events, including a blue spectral energy distribution and prominent and narrow (v(FWHM) approximate to 1900 km s(-1)) He I emission lines. This suggests that the ejecta are interacting with He-rich circumstellar material. The detection of broad (10(4) km s(-1)) O I and Ca II features likely produced in the SN ejecta (including the [OI] lambda lambda 6300,6364 doublet in the latest spectra) lends support to the interpretation of OGLE-2012-SN-006 as a core-collapse event.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stu2621
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stu2621
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101568
dc.identifier.wosidWOS:000355337500063
dc.issue.numero2
dc.language.isoen
dc.pagina.final1953
dc.pagina.inicio1941
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectsupernovae: general
dc.subjectsupernovae: individual: OGLE-2012-SN-006
dc.subjectsupernovae: individual: SN 2006jc
dc.subjectsupernovae: individual: SN 2010al
dc.titleMassive stars exploding in a He-rich circumstellar medium - V. Observations of the slow-evolving SN Ibn OGLE-2012-SN-006
dc.typeartículo
dc.volumen449
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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