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- W2060925100 endingPage "47" @default.
- W2060925100 startingPage "47" @default.
- W2060925100 abstract "SN 2007it is a bright, Type IIP supernova which shows indications of both pre-existing and newly formed dust. The visible photometry shows a bright late-time luminosity, powered by the 0.09 M$_{sun}$ of $^{56}$Ni present in the ejecta. There is also a sudden drop in optical brightness after day 339, and a corresponding brightening in the IR due to new dust forming in the ejecta. CO and SiO emission, generally thought to be precursors to dust formation, may have been detected in the mid-IR photometry of SN 2007it. The optical spectra show stronger than average [O I] emission lines and weaker than average [Ca II] lines, which may indicate a 16 - 27 M$_{sun}$ progenitor, on the higher end of expected Type IIP masses. Multi-component [O I] lines are also seen in the optical spectra, most likely caused by an asymmetric blob or a torus of oxygen core material being ejected during the SN explosion. Interaction with circumstellar material prior to day 540 may have created a cool dense shell between the forward and reverse shocks where new dust is condensing. At late times there is also a flattening of the visible lightcurve as the ejecta luminosity fades and a surrounding light echo becomes visible. Radiative transfer models of SN 2007it SEDs indicate that up to 10$^{-4}$ M$_{sun}$ of new dust has formed in the ejecta, which is consistent with the amount of dust formed in other core collapse supernovae." @default.
- W2060925100 created "2016-06-24" @default.
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- W2060925100 date "2011-03-22" @default.
- W2060925100 modified "2023-10-01" @default.
- W2060925100 title "PHOTOMETRIC AND SPECTROSCOPIC EVOLUTION OF THE IIP SN 2007it TO DAY 944" @default.
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- W2060925100 doi "https://doi.org/10.1088/0004-637x/731/1/47" @default.
- W2060925100 hasPublicationYear "2011" @default.
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