SN 2005cs in M51 II. Complete Evolution in the Optical and the Near-Infrared - Astrophysics > Astrophysics of GalaxiesReport as inadecuate




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Abstract: We present the results of the one year long observational campaign of thetype II-plateau SN 2005cs, which exploded in the nearby spiral galaxy M51 theWhirlpool Galaxy. This extensive dataset makes SN 2005cs the best observedlow-luminosity, 56Ni-poor type II-plateau event so far and one of the bestcore-collapse supernovae ever. The optical and near-infrared spectra shownarrow P-Cygni lines characteristic of this SN family, which are indicative ofa very low expansion velocity about 1000 km-s of the ejected material. Theoptical light curves cover both the plateau phase and the late-time radioactivetail, until about 380 days after core-collapse. Numerous unfilteredobservations obtained by amateur astronomers give us the rare opportunity tomonitor the fast rise to maximum light, lasting about 2 days. In addition tooptical observations, we also present near-infrared light curves that togetherwith already published UV observations allow us to construct for the firsttime a reliable bolometric light curve for an object of this class. Finally,comparing the observed data with those derived from a semi-analytic model, weinfer for SN 2005cs a 56Ni mass of about 0.003 solar masses, a total ejectedmass of 8-13 solar masses and an explosion energy of about 3 x 10^50 erg.



Author: A. Pastorello, S. Valenti, L. Zampieri, H. Navasardyan, S. Taubenberger, S. J. Smartt, A. A. Arkharov, O. Baernbantner, H. Barwig

Source: https://arxiv.org/







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