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SN 2005cs in M51 – II. Complete evolution in the optical and the near-infrared

Pastorello, A. and Valenti, S. and Zampieri, L. and Navasardyan, H. and Taubenberger, S. and Smartt, S. J. and Arkharov, A. A. and Bärnbantner, O. and Barwig, H. and Benetti, S. and Birtwhistle, P. and Botticella, M. T. and Cappellaro, E. and Del Principe, M. and Di Mille, F. and Di Rico, G. and Dolci, M. and Elias-Rosa, N. and Efimova, N. V. and Fiedler, M. and Harutyunyan, A. and Höflich, P. A. and Kloehr, W. and Larionov, V. M. and Lorenzi, V. and Maund, J. R. and Napoleone, N. and Ragni, M. and Richmond, M. and Ries, C. and Spiro, S. and Temporin, S. and Turatto, M. and Wheeler, J. C. (2009) SN 2005cs in M51 – II. Complete evolution in the optical and the near-infrared. Monthly Notices of the Royal Astronomical Society, 394 (4). pp. 2266-2282. ISSN 0035-8711.

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We present the results of the one-year long observational campaign of the type II 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, ^(56)Ni-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 d. 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 with those derived from a semi-analytic model, we infer for SN 2005cs a ^(56)Ni mass of about 3 × 10^(−3) M⊙, a total ejected mass of 8–13 M⊙ and an explosion energy of about 3 × 10^(50) erg .

Item Type:Article
Related URLs:
URLURL TypeDescription
Valenti, S.0000-0001-8818-0795
Taubenberger, S.0000-0002-4265-1958
Smartt, S. J.0000-0002-8229-1731
Benetti, S.0000-0002-3256-0016
Cappellaro, E.0000-0001-5008-8619
Elias-Rosa, N.0000-0002-1381-9125
Maund, J. R.0000-0003-0733-7215
Additional Information:© 2009 The Authors. Journal compilation © 2009 RAS. Accepted 2009 January 13. Received 2009 January 12; in original form 2008 December 8. SB, EC and MTB are supported by the Italian Ministry of Education via the PRIN 2006 n.2006022731-002. This paper is partially based on observations obtained with the Hobby–Eberly Telescope, which is a joint project of the University of Texas at Austin, the Pennsylvania State University, Stanford University, Ludwig-Maximilians-Universität München and Georg- August-Universität Göttingen. This paper is also based on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated on the island of La Palma by the Fundaci´on Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica), with the William Herschel and Liverpool Telescopes operated on the island of La Palma by the Isaac Newton Group at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias, and with the AZT-24 Telescope (Campo Imperatore, Italy) operated jointly by Pulkovo observatory (St Petersburg, Russia) and INAF Observatorio Astronomico di Roma/Collurania. The paper made also use of observations collected at the INAF-Asiago Observatory and at the Centro Astron´omico Hispano Alem´an (CAHA) at Calar Alto, operated jointly by the Max-Planck-Institut für Astronomie and the Instituto de Astrof´ısica de Andaluc´ıa (CSIC). We acknowledge the amateur astronomers U. Bietola (Gruppo Imperiese Astrofili,, P. Corelli (Mandi Observatory), P. Marek (Skymaster Observatory, Variable Star Section of Czech Astronomical Society, http://www.skymaster. cz/), C. McDonnell, T. Scarmato ( infosis/homepage/astronomia/comet1.html), I. Uhl and the group of the Osservatorio Astronomico Geminiano Montanari ( for providing us their original observations. This manuscript made use of information contained in the Bright Supernova web pages (maintained by the priceless work of D. Bishop), as part of the Rochester Academy of Sciences (
Funding AgencyGrant Number
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)20060227311-002
Subject Keywords:supernovae: general; supernovae: individual: SN 2005cs; supernovae: individual: SN 1997D; supernovae: individual: SN 1999br; supernovae: individual: SN 2003Z; galaxies: individual: M51
Issue or Number:4
Record Number:CaltechAUTHORS:20090908-142312842
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:15677
Deposited By: Tony Diaz
Deposited On:14 Sep 2009 16:38
Last Modified:20 Nov 2019 04:35

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