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Supernova 2009kf: An Ultraviolet Bright Type IIP Supernova Discovered with Pan-STARRS 1 and GALEX

Botticella, M. T. and Neill, J. D. and Forster, K. and Martin, D. C. (2010) Supernova 2009kf: An Ultraviolet Bright Type IIP Supernova Discovered with Pan-STARRS 1 and GALEX. Astrophysical Journal Letters, 717 (1). L52-L56. ISSN 2041-8205. doi:10.1088/2041-8205/717/1/L52.

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We present photometric and spectroscopic observations of a luminous Type IIP Supernova (SN) 2009kf discovered by the Pan-STARRS 1 (PS1) survey and also detected by the Galaxy Evolution Explorer. The SN shows a plateau in its optical and bolometric light curves, lasting approximately 70 days in the rest frame, with an absolute magnitude of M_V = -18.4 mag. The P-Cygni profiles of hydrogen indicate expansion velocities of 9000 km s^(-1) at 61 days after discovery which is extremely high for a Type IIP SN. SN 2009kf is also remarkably bright in the near-ultraviolet (NUV) and shows a slow evolution 10-20 days after optical discovery. The NUV and optical luminosity at these epochs can be modeled with a blackbody with a hot effective temperature (T ~ 16,000 K) and a large radius (R ~ 1 × 10^(15) cm). The bright bolometric and NUV luminosity, the light curve peak and plateau duration, the high velocities, and temperatures suggest that 2009kf is a Type IIP SN powered by a larger than normal explosion energy. Recently discovered high-z SNe (0.7 < z < 2.3) have been assumed to be IIn SNe, with the bright UV luminosities due to the interaction of SN ejecta with a dense circumstellar medium. UV-bright SNe similar to SN 2009kf could also account for these high-z events, and its absolute magnitude M_(NUV) = -21.5 ± 0.5 mag suggests such SNe could be discovered out to z ~ 2.5 in the PS1 survey.

Item Type:Article
Related URLs:
URLURL TypeDescription
Neill, J. D.0000-0002-0466-1119
Forster, K.0000-0001-5800-5531
Martin, D. C.0000-0002-8650-1644
Additional Information:© 2010 The American Astronomical Society. Received 2010 January 29; accepted 2010 May 12; published 2010 June 16. The PS1 Surveys have been made possible through contributions of the Institute for Astronomy at the University of Hawaii in Manoa, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, Johns Hopkins University, the University of Durham, the University of Edinburgh, the Queens University Belfast, the Harvard-Smithsonian Center for Astrophysics, and the Los Cumbres Observatory Global Telescope Network, Incorporated. This work is also based on observations collected at LT, WHT and NOT (La Palma), and Gemini (Hawaii). This work, conducted as part of the award “Understanding the lives of massive stars from birth to supernovae” (S.J.S.) made under the European Heads of Research Councils and European Science Foundation EURYI Awards scheme, see M.T.B. thanks E. Cappellaro, L. Zampieri, and S. Benetti for helpful discussions. S.M. and E.K. acknowledge support from the Academy of Finland (project:8120503).
Group:Space Radiation Laboratory, Space Astrophysics Laboratory
Funding AgencyGrant Number
Academy of Finland8120503
Subject Keywords:stars: evolution; supernovae: general; supernovae: individual (2009kf)
Issue or Number:1
Classification Code:PACS: 95.80.+p; 97.10.Fy; 97.10.Ri; 97.60.Bw; 95.85.Kr
Record Number:CaltechAUTHORS:20100720-100110749
Persistent URL:
Official Citation:M. T. Botticella et al 2010 ApJ 717 L52 doi: 10.1088/2041-8205/717/1/L52
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19121
Deposited By: Tony Diaz
Deposited On:05 Aug 2010 17:51
Last Modified:08 Nov 2021 23:49

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