期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 394, 期 4, 页码 2266-2282出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2009.14505.x
关键词
supernovae: general; supernovae: individual: SN 2005cs; supernovae: individual: SN 1997D; supernovae: individual: SN 1999br; supernovae: individual: SN 2003Z; galaxies: individual: M51
资金
- Italian Ministry of Education [20060227311-002]
- STFC [ST/G000921/1, PP/D508212/1, PP/C506805/1, ST/G009465/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D508212/1, ST/G000921/1, PP/C506805/1, ST/G009465/1] Funding Source: researchfish
We present the results of the one-year long observational campaign of the type 11 plateau SN 2005cs, which exploded in the nearby spiral galaxy M51 (the Whirlpool galaxy). This extensive data set makes SN 2005cs the best observed low-luminosity, Ni-56-poor type II plateau event so far and one of the best core-collapse supernovae ever. The optical and near-infrared spectra show narrow P-Cygni lines characteristic of this SN family, which are indicative of a very low expansion velocity (about 1000 km s(-1)) of the ejected material. The optical light curves cover both the plateau phase and the late-time radioactive tail, until about 380 d after core-collapse. Numerous unfiltered observations obtained by amateur astronomers give us the rare opportunity to monitor the fast rise to maximum light, lasting about 2 cl. In addition to optical observations, we also present near-infrared light curves that (together with already published ultraviolet observations) allow us to construct for the first time a reliable bolometric light Curve for an object of this class. Finally. comparing the observed data withthose derived front it semi-analytic model, we infer for SN 2005cs a Ni-56 mass of about 3 x 10(-3) M-circle dot a total ejected mass of 8-13 M-circle dot and an explosion energy of about 3 x 10(50) erg.
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