Details

Autor(en) / Beteiligte

• Pian, E
• Tomasella, L
• Cappellaro, E
• Benetti, S
• Mazzali, P A
• Baltay, C
• Branchesi, M
• Brocato, E
• Campana, S
• Copperwheat, C
• Covino, S
• D'Avanzo, P
• Ellman, N
• Grado, A
• Melandri, A
• Palazzi, E
• Piascik, A
• Piranomonte, S
• Rabinowitz, D
• Raimondo, G
• Smartt, S J
• Steele, I A
• Stritzinger, M
• Yang, S
• Ascenzi, S
• Della Valle, M
• Gal-Yam, A
• Getman, F
• Greco, G
• Inserra, C
• Kankare, E
• Limatola, L
• Nicastro, L
• Pastorello, A
• Pulone, L
• Stamerra, A
• Stella, L
• Stratta, G
• Tartaglia, L
• Turatto, M

Titel

Optical photometry and spectroscopy of the low-luminosity, broad-lined Ic supernova iPTF15dld

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2017-04, Vol.466 (2), p.1848-1848

Ort / Verlag

London: Oxford University Press

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Core-collapse stripped-envelope supernova (SN) explosions reflect the diversity of physical parameters and evolutionary paths of their massive star progenitors. We have observed the Type Ic SN iPTF15dld (z = 0.047), reported by the Palomar Transient Factory. Spectra were taken starting 20 rest-frame days after maximum luminosity and are affected by a young stellar population background. Broad spectral absorption lines associated with the SN are detected over the continuum, similar to those measured for broad-lined, highly energetic SNe Ic. The light curve and maximum luminosity are instead more similar to those of low luminosity, narrow-lined Ic SNe. This suggests a behaviour whereby certain highly stripped-envelope SNe do not produce a large amount of 56Ni, but the explosion is sufficiently energetic that a large fraction of the ejecta is accelerated to higher than usual velocities. We estimate SN iPTF15dld had a main-sequence progenitor of 20-25 M..., produced a super( 56)Ni mass of ~0.1-0.2 M..., had an ejecta mass of [2-10] M..., and a kinetic energy of [1-18] x 10 super( 51) erg. (ProQuest: ... denotes formulae/symbols omitted.)