Luminous Type II supernovae for their low expansion velocities

We present optical and near-IR data of three Type II supernovae (SNe II), SN 2008bm, SN 2009aj, and SN 2009au. These SNe display the following common characteristics: signs of early interaction of the ejecta with circumstellar material (CSM), blue B−V colours, weakness of metal lines, low expansion...

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Autores principales: Rodríguez, O., Pignata, G., Anderson, J. P., Moriya, T. J., Clocchiatti García, Alejandro, Förster, F., Prieto, J. L., Phillips, M. M., Burns, C. R., Contreras, C., Folatelli, Gastón, Gutiérrez, C. P., Hamuy, M., Morrell, N. I., Stritzinger, M. D., Suntzeff, N. B., Benetti, S., Cappellaro, E., Elias Rosa, N., Pastorello, A., Turatto, M., Maza, J., Antezana, R., Cartier, R., González, L., Haislip, J. B., Kouprianov, V., López, P., Marchi Lasch, S., Reichart, D.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Astronómicas
Física
Circumstellar matter
Supernovae: general
supernovae: individual: SN 1983K, SN 2008bm, SN 2009aj, SN 2009au, LSQ13fn
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124898
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124898
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Física
Circumstellar matter
Supernovae: general
supernovae: individual: SN 1983K, SN 2008bm, SN 2009aj, SN 2009au, LSQ13fn
spellingShingle Ciencias Astronómicas
Física
Circumstellar matter
Supernovae: general
supernovae: individual: SN 1983K, SN 2008bm, SN 2009aj, SN 2009au, LSQ13fn
Rodríguez, O.
Pignata, G.
Anderson, J. P.
Moriya, T. J.
Clocchiatti García, Alejandro
Förster, F.
Prieto, J. L.
Phillips, M. M.
Burns, C. R.
Contreras, C.
Folatelli, Gastón
Gutiérrez, C. P.
Hamuy, M.
Morrell, N. I.
Stritzinger, M. D.
Suntzeff, N. B.
Benetti, S.
Cappellaro, E.
Elias Rosa, N.
Pastorello, A.
Turatto, M.
Maza, J.
Antezana, R.
Cartier, R.
González, L.
Haislip, J. B.
Kouprianov, V.
López, P.
Marchi Lasch, S.
Reichart, D.
Luminous Type II supernovae for their low expansion velocities
topic_facet Ciencias Astronómicas
Física
Circumstellar matter
Supernovae: general
supernovae: individual: SN 1983K, SN 2008bm, SN 2009aj, SN 2009au, LSQ13fn
description We present optical and near-IR data of three Type II supernovae (SNe II), SN 2008bm, SN 2009aj, and SN 2009au. These SNe display the following common characteristics: signs of early interaction of the ejecta with circumstellar material (CSM), blue B−V colours, weakness of metal lines, low expansion velocities, and V -band absolute magnitudes 2–3 mag brighter than those expected for normal SNe II based on their expansion velocities. Two more SNe reported in the literature (SN 1983K and LSQ13fn) share properties similar to our sample. Analysing this set of five SNe II, which are luminous for their low expansion velocities (LLEV), we find that their properties can be reproduced assuming ejecta-CSM interaction that lasts between 4–11 weeks post explosion. The contribution of this interaction to the radiation field seems to be the dominant component determining the observed weakness of metal lines in the spectra rather than the progenitor metallicity. Based on hydrodynamic simulations, we find that the interaction of the ejecta with a CSM of ∼ 3.6 M⊙ can reproduce the light curves and expansion velocities of SN 2009aj. Using data collected by the Chilean Automatic Supernova Search, we estimate an upper limit for the LLEV SNe II fraction to be 2–4 per cent of all normal SNe II. With the current data-set, it is not clear whether the LLEV events are a separated class of SNe II with a different progenitor system, or whether they are the extreme of a continuum mediated by CSM interaction with the rest of the normal SN II population.
format Articulo
Preprint
author Rodríguez, O.
Pignata, G.
Anderson, J. P.
Moriya, T. J.
Clocchiatti García, Alejandro
Förster, F.
Prieto, J. L.
Phillips, M. M.
Burns, C. R.
Contreras, C.
Folatelli, Gastón
Gutiérrez, C. P.
Hamuy, M.
Morrell, N. I.
Stritzinger, M. D.
Suntzeff, N. B.
Benetti, S.
Cappellaro, E.
Elias Rosa, N.
Pastorello, A.
Turatto, M.
Maza, J.
Antezana, R.
Cartier, R.
González, L.
Haislip, J. B.
Kouprianov, V.
López, P.
Marchi Lasch, S.
Reichart, D.
author_facet Rodríguez, O.
Pignata, G.
Anderson, J. P.
Moriya, T. J.
Clocchiatti García, Alejandro
Förster, F.
Prieto, J. L.
Phillips, M. M.
Burns, C. R.
Contreras, C.
Folatelli, Gastón
Gutiérrez, C. P.
Hamuy, M.
Morrell, N. I.
Stritzinger, M. D.
Suntzeff, N. B.
Benetti, S.
Cappellaro, E.
Elias Rosa, N.
Pastorello, A.
Turatto, M.
Maza, J.
Antezana, R.
Cartier, R.
González, L.
Haislip, J. B.
Kouprianov, V.
López, P.
Marchi Lasch, S.
Reichart, D.
author_sort Rodríguez, O.
title Luminous Type II supernovae for their low expansion velocities
title_short Luminous Type II supernovae for their low expansion velocities
title_full Luminous Type II supernovae for their low expansion velocities
title_fullStr Luminous Type II supernovae for their low expansion velocities
title_full_unstemmed Luminous Type II supernovae for their low expansion velocities
title_sort luminous type ii supernovae for their low expansion velocities
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/124898
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