Details

Autor(en) / Beteiligte

• Angus, C R
• Smith, M
• Sullivan, M
• Inserra, C
• Wiseman, P
• D’Andrea, C B
• Thomas, B P
• Nichol, R C
• Galbany, L
• Childress, M
• Asorey, J
• Brown, P J
• Casas, R
• Castander, F J
• Curtin, C
• Frohmaier, C
• Glazebrook, K
• Gruen, D
• Gutierrez, C
• Kessler, R
• Kim, A G
• Lidman, C
• Macaulay, E
• Nugent, P
• Pursiainen, M
• Sako, M
• Soares-Santos, M
• Thomas, R C
• Abbott, T M C
• Avila, S
• Bertin, E
• Brooks, D
• Buckley-Geer, E
• Burke, D L
• Carnero Rosell, A
• Carretero, J
• da Costa, L N
• De Vicente, J
• Desai, S
• Diehl, H T
• Doel, P
• Eifler, T F
• Flaugher, B
• Fosalba, P
• Frieman, J
• García-Bellido, J
• Gruendl, R A
• Gschwend, J
• Hartley, W G
• Hollowood, D L
• Honscheid, K
• Hoyle, B
• James, D J
• Kuehn, K
• Kuropatkin, N
• Lahav, O
• Lima, M
• Maia, M A G
• March, M
• Marshall, J L
• Menanteau, F
• Miller, C J
• Miquel, R
• Ogando, R L C
• Plazas, A A
• Romer, A K
• Sanchez, E
• Schindler, R
• Schubnell, M
• Sobreira, F
• Suchyta, E
• Swanson, M E C
• Tarle, G
• Thomas, D
• Tucker, D L

Titel

Superluminous supernovae from the Dark Energy Survey

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2019-08, Vol.487 (2), p.2215-2241

Ort / Verlag

United States: Royal Astronomical Society

Erscheinungsjahr

2019

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• ABSTRACT We present a sample of 21 hydrogen-free superluminous supernovae (SLSNe-I) and one hydrogen-rich SLSN (SLSN-II) detected during the five-year Dark Energy Survey (DES). These SNe, located in the redshift range 0.220 < z < 1.998, represent the largest homogeneously selected sample of SLSN events at high redshift. We present the observed g, r, i, z light curves for these SNe, which we interpolate using Gaussian processes. The resulting light curves are analysed to determine the luminosity function of SLSNe-I, and their evolutionary time-scales. The DES SLSN-I sample significantly broadens the distribution of SLSN-I light-curve properties when combined with existing samples from the literature. We fit a magnetar model to our SLSNe, and find that this model alone is unable to replicate the behaviour of many of the bolometric light curves. We search the DES SLSN-I light curves for the presence of initial peaks prior to the main light-curve peak. Using a shock breakout model, our Monte Carlo search finds that 3 of our 14 events with pre-max data display such initial peaks. However, 10 events show no evidence for such peaks, in some cases down to an absolute magnitude of <−16, suggesting that such features are not ubiquitous to all SLSN-I events. We also identify a red pre-peak feature within the light curve of one SLSN, which is comparable to that observed within SN2018bsz.