SUPERNOVA 2009kf: AN ULTRAVIOLET BRIGHT TYPE IIP SUPERNOVA DISCOVERED WITH PAN-STARRS 1 AND GALEX
- Astrophysics Research Centre, School of Maths and Physics, Queen's University, BT7 1NN, Belfast (United Kingdom)
- Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States)
- Department of Physics, Harvard University, Cambridge, MA 02138 (United States)
- Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822 (United States)
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Piikkioe, FI 21500 (Finland)
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States)
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218-2463 (United States)
- California Institute of Technology, 1200 East California Blvd., Pasadena, CA 91125 (United States)
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{sub V} = -18.4 mag. The P-Cygni profiles of hydrogen indicate expansion velocities of 9000 km s{sup -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 {approx} 16,000 K) and a large radius (R {approx} 1 x 10{sup 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{sub NUV} = -21.5 {+-} 0.5 mag suggests such SNe could be discovered out to z {approx} 2.5 in the PS1 survey.
- OSTI ID:
- 21451050
- Journal Information:
- Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 717; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
Similar Records
GALEX AND PAN-STARRS1 DISCOVERY OF SN IIP 2010aq: THE FIRST FEW DAYS AFTER SHOCK BREAKOUT IN A RED SUPERGIANT STAR
SN 2013ej: A type IIL supernova with weak signs of interaction