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DES13S2cmm : the first superluminous supernova from the Dark Energy Survey

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DES13S2cmm : the first superluminous supernova from the Dark Energy Survey

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Título DES13S2cmm : the first superluminous supernova from the Dark Energy Survey
Autor Papadopoulos, Andreas
D'Andrea, Christopher B.
Sullivan, Mark
Nichol, Robert C.
Barbary, Kyle
Biswas, Rahul
Brown, Peter J.
Covarrubias, Ricardo A.
Finley, David A.
Fischer, John A.
Foley, Ryan Joseph
Goldstein, Daniel Abraham
Gupta, Ravi R.
Kessler, Richard S.
Kovacs, Eve Veronika
Kuhlmann, Stephen Eugene
Lidman, Chris
March, Marisa Cristina
Nugent, Peter Edward
Sako, Masao
Smith, Robert Christopher
Spinka, Harold M.
Wester, William Carl
Abbott, Timothy M. C.
Abdalla, Filipe B.
Allam, Sahar S.
Banerji, M.
Bernstein, Joseph P.
Bernstein, Rebecca A.
Carnero Rosell, Aurelio
Costa, Luiz N. da
DePoy, Darren L.
Desai, S.
Diehl, H. Thomas
Eifler, Tim
Evrard, August E.
Flaugher, Brenna
Frieman, Joshua A.
Gerdes, David W.
Gruen, Daniel
Honscheid, K.
James, David J.
Kuehn, Kyler
Kuropatkin, Nikolay P.
Lahav, Ofer
Maia, Marcio Antonio Geimba
Makler, Martín
Marshall, Jennifer L.
Merritt, K. Wyatt
Miller, Christopher J.
Miquel, Ramon
Ogando, Ricardo L.C.
Plazas Malagón, Andrés Alejandro
Roe, Natalie A.
Romer, Anita K.
Rykoff, Eli
Sanchez-Alvaro, Eusebio
Santiago, Basilio Xavier
Scarpine, Victor Emanuel
Schubnell, Michael
Sevilla Noarbe, Ignacio
Soares-Santos, Marcelle
Suchyta, Eric
Swanson, Molly E. C.
Tarle, Gregory
Thaler, Jon J.
Tucker, Douglas L.
Wechsler, Risa H.
Zuntz, J.
Abstract We present DES13S2cmm, the first spectroscopically-confirmed superluminous supernova (SLSN) from the Dark Energy Survey (DES).We briefly discuss the data and search algorithm used to find this event in the first year of DES operations, and outline the spectroscopic data obtained from the European Southern Observatory (ESO) Very Large Telescope to confirm its redshift (z = 0.663 ± 0.001 based on the host-galaxy emission lines) and likely spectral type (Type I). Using this redshift, we find M peak U = −21.05+0.10 −0.09 for the peak, rest-frame U-band absolute magnitude, and find DES13S2cmm to be located in a faint, low-metallicity (subsolar), low stellar-mass host galaxy (log (M/M ) = 9.3 ± 0.3), consistent with what is seen for other SLSNe-I. We compare the bolometric light curve of DES13S2cmm to 14 similarly well-observed SLSNe-I in the literature and find that it possesses one of the slowest declining tails (beyond +30 d rest-frame past peak), and is the faintest at peak. Moreover, we find the bolometric light curves of all SLSNe-I studied herein possess a dispersion of only 0.2–0.3 mag between +25 and +30 d after peak (rest frame) depending on redshift range studied; this could be important for ‘standardizing’ such supernovae, as is done with the more common Type Ia. We fit the bolometric light curve of DES13S2cmm with two competing models for SLSNe-I – the radioactive decay of 56Ni, and a magnetar – and find that while the magnetar is formally a better fit, neither model provides a compelling match to the data. Although we are unable to conclusively differentiate between these two physical models for this particular SLSN-I, further DES observations of more SLSNe-I should break this degeneracy, especially if the light curves of SLSNe-I can be observed beyond 100 d in the rest frame of the supernova.
Contido em Monthly notices of the Royal Astronomical Society. Oxford. Vol. 449, no. 2 (May 2015), p. 1215-1227
Assunto Via láctea
[en] Supernovae: general
[en] Supernovae: individual: DES13S2cmm
[en] Surveys
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/126975
Arquivos Descrição Formato
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