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- W2087012109 abstract "We present spectroscopic and photometric observations of the luminous narrow-line Type IIP (plateau) supernova 1994W. After the plateau phase (t ≳ 120 days), the light curve dropped by ~3.5 mag in V in only 12 days. Between 125 and 197 days after explosion, the supernova faded substantially faster than the decay rate of 56Co, and by day 197 it was 3.6 mag less luminous in R than SN 1987A. The low R luminosity could indicate ≲0.0026+ 0.0017−0.0011 M☉ of 56Ni ejected at the explosion. The emission between 125 and 197 days would in this case be dominated by diffusion of emission from the mantle region, or by an additional power source, presumably circumstellar interaction. Alternatively, the late light curve could have been dominated by 56Co decay. In this case, the mass of the ejected 56Ni would have been 0.015+ 0.012−0.008 M☉, and the rapid fading between 125 and 197 days most likely due to dust formation. Although this value of the mass is higher than in the first case, it is still lower than estimated for any previous Type II supernova." @default.
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- W2087012109 date "1998-02-01" @default.
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- W2087012109 title "A Very Low Mass of<sup>56</sup>Ni in the Ejecta of SN 1994W" @default.
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- W2087012109 doi "https://doi.org/10.1086/305163" @default.
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