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SNe 2013K and 2013am: observed and physical properties of two slow, normal Type IIP events

SNe 2013K and 2013am: observed and physical properties of two slow, normal Type IIP events
SNe 2013K and 2013am: observed and physical properties of two slow, normal Type IIP events

We present 1 yr of optical and near-infrared photometry and spectroscopy of the Type IIP SNe 2013K and 2013am. Both objects are affected by significant extinction, due to their location in dusty regions of their respective host galaxies, ESO 009-10 and NGC 3623 (M65). From the photospheric to nebular phases, these objects display spectra congruent with those of underluminous Type IIP SNe (i.e. the archetypal SNe 1997D or 2005cs), showing low photospheric velocities (~2 × 103 km s-1 at 50 d) together with features arising from Ba II that are particularly prominent in faint SNe IIP. The peak V-band magnitudes of SN 2013K (-15.6mag) and SN 2013am (-16.2mag) are fainter than standard-luminosity Type IIP SNe. The ejected nickel masses are 0.012 ± 0.010 and 0.015 ± 0.006 M for SN 2013K and SN 2013am, respectively. The physical properties of the progenitors at the time of explosion are derived through hydrodynamical modelling. Fitting the bolometric curves, the expansion velocity and the temperature evolution, we infer total ejected masses of 12 and 11.5 M, pre- SN radii of~460 and~360 R, and explosion energies of 0.34 foe and 0.40 foe for SN 2013K and SN 2013am. Late time spectra are used to estimate the progenitormasses from the strength of nebular emission lines, which turn out to be consistent with red supergiant progenitors of ~15 M. For both SNe, a low-energy explosion of a moderate-mass red supergiant star is therefore the favoured scenario.

ESO 009-10, Galaxies: individual: M 65, SN 2013K, Supernovae: general, Supernovae: individual: SN 2013am
0035-8711
1937-1959
Tomasella, L.
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Cappellaro, E.
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Pumo, M.L.
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Jerkstrand, A.
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Benetti, S.
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Elias-Rosa, N.
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Fraser, M.
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Inserra, C.
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Pastorello, A.
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Turatto, M.
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Anderson, J.P.
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Galbany, L.
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Gutiérrez, C.P.
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Kankare, E.
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Pignata, G.
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Terreran, G.
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Valenti, S.
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Barbarino, C.
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Bauer, F.E.
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Botticella, M.T.
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Chen, T.W.
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Gal-Yam, A.
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Harutyunyan, A.
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Howell, D.A.
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Maguire, K.
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Garoffolo, A. Morales
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Ochner, P.
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Smartt, S.J.
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Schulze, S.
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Young, D.R.
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Zampieri, L.
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Tomasella, L.
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Cappellaro, E.
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Pumo, M.L.
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Jerkstrand, A.
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Benetti, S.
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Elias-Rosa, N.
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Fraser, M.
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Inserra, C.
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Pastorello, A.
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Turatto, M.
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Anderson, J.P.
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Galbany, L.
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Gutiérrez, C.P.
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Kankare, E.
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Pignata, G.
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Terreran, G.
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Valenti, S.
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Barbarino, C.
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Bauer, F.E.
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Botticella, M.T.
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Chen, T.W.
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Gal-Yam, A.
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Harutyunyan, A.
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Howell, D.A.
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Maguire, K.
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Garoffolo, A. Morales
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Ochner, P.
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Smartt, S.J.
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Schulze, S.
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Young, D.R.
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Zampieri, L.
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Tomasella, L., Cappellaro, E., Pumo, M.L., Jerkstrand, A., Benetti, S., Elias-Rosa, N., Fraser, M., Inserra, C., Pastorello, A., Turatto, M., Anderson, J.P., Galbany, L., Gutiérrez, C.P., Kankare, E., Pignata, G., Terreran, G., Valenti, S., Barbarino, C., Bauer, F.E., Botticella, M.T., Chen, T.W., Gal-Yam, A., Harutyunyan, A., Howell, D.A., Maguire, K., Garoffolo, A. Morales, Ochner, P., Smartt, S.J., Schulze, S., Young, D.R. and Zampieri, L. (2018) SNe 2013K and 2013am: observed and physical properties of two slow, normal Type IIP events. Monthly Notices of the Royal Astronomical Society, 475 (2), 1937-1959. (doi:10.1093/mnras/stx3220).

Record type: Article

Abstract

We present 1 yr of optical and near-infrared photometry and spectroscopy of the Type IIP SNe 2013K and 2013am. Both objects are affected by significant extinction, due to their location in dusty regions of their respective host galaxies, ESO 009-10 and NGC 3623 (M65). From the photospheric to nebular phases, these objects display spectra congruent with those of underluminous Type IIP SNe (i.e. the archetypal SNe 1997D or 2005cs), showing low photospheric velocities (~2 × 103 km s-1 at 50 d) together with features arising from Ba II that are particularly prominent in faint SNe IIP. The peak V-band magnitudes of SN 2013K (-15.6mag) and SN 2013am (-16.2mag) are fainter than standard-luminosity Type IIP SNe. The ejected nickel masses are 0.012 ± 0.010 and 0.015 ± 0.006 M for SN 2013K and SN 2013am, respectively. The physical properties of the progenitors at the time of explosion are derived through hydrodynamical modelling. Fitting the bolometric curves, the expansion velocity and the temperature evolution, we infer total ejected masses of 12 and 11.5 M, pre- SN radii of~460 and~360 R, and explosion energies of 0.34 foe and 0.40 foe for SN 2013K and SN 2013am. Late time spectra are used to estimate the progenitormasses from the strength of nebular emission lines, which turn out to be consistent with red supergiant progenitors of ~15 M. For both SNe, a low-energy explosion of a moderate-mass red supergiant star is therefore the favoured scenario.

Full text not available from this repository.

More information

Accepted/In Press date: 9 December 2017
e-pub ahead of print date: 13 December 2017
Published date: 1 April 2018
Keywords: ESO 009-10, Galaxies: individual: M 65, SN 2013K, Supernovae: general, Supernovae: individual: SN 2013am

Identifiers

Local EPrints ID: 420617
URI: http://eprints.soton.ac.uk/id/eprint/420617
ISSN: 0035-8711
PURE UUID: 3b0eab1b-5ff9-481e-b20b-07f16524320b
ORCID for C. Inserra: ORCID iD orcid.org/0000-0002-3968-4409

Catalogue record

Date deposited: 11 May 2018 16:30
Last modified: 20 Nov 2019 17:31

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Contributors

Author: L. Tomasella
Author: E. Cappellaro
Author: M.L. Pumo
Author: A. Jerkstrand
Author: S. Benetti
Author: N. Elias-Rosa
Author: M. Fraser
Author: C. Inserra ORCID iD
Author: A. Pastorello
Author: M. Turatto
Author: J.P. Anderson
Author: L. Galbany
Author: C.P. Gutiérrez
Author: E. Kankare
Author: G. Pignata
Author: G. Terreran
Author: S. Valenti
Author: C. Barbarino
Author: F.E. Bauer
Author: M.T. Botticella
Author: T.W. Chen
Author: A. Gal-Yam
Author: A. Harutyunyan
Author: D.A. Howell
Author: K. Maguire
Author: A. Morales Garoffolo
Author: P. Ochner
Author: S.J. Smartt
Author: S. Schulze
Author: D.R. Young
Author: L. Zampieri

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