SN 2009kf : a UV bright type IIP supernova discovered with Pan-STARRS 1 and GALEX
| Autor: | Botticella, M. T., Trundle, C., Pastorello, A., Rodney, S., Rest, A., Gezari, S., Smartt, S. J., Narayan, G., Huber, M. E., Tonry, J. L., Young, D., Smith, K., Bresolin, F., Valenti, S., Kotak, R., Mattila, S., Kankare, E., Wood-Vasey, W. M., Riess, A., Neill, J. D., Forster, K., Martin, D. C., Stubbs, C. W., Burgett, W. S., Chambers, K. C., Dombeck, T., Flewelling, H., Grav, T., Heasley, J. N., Hodapp, K. W., Kaiser, N., Kudritzki, R., Luppino, G., Lupton, R. H., Magnier, E. A., Monet, D. G., Morgan, J. S., Onaka, P. M., Price, P. A., Rhoads, P. H., Siegmund, W. A., Sweeney, W. E., Wainscoat, R. J., Waters, C., Waterson, M. F., Wynn-Williams, C. G. |
|---|---|
| Rok vydání: | 2010 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/2041-8205/717/1/L52 |
| Popis: | We present photometric and spectroscopic observations of a luminous type IIP Supernova 2009kf discovered by the Pan-STARRS 1 (PS1) survey and detected also by GALEX. The SN shows a plateau in its optical and bolometric light curves, lasting approximately 70 days in the rest frame, with absolute magnitude of M_V = -18.4 mag. The P-Cygni profiles of hydrogen indicate expansion velocities of 9000km/s 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 modelled with a black-body with a hot effective temperature (T ~16,000 K) and a large radius (R ~1x10^{15} cm). The bright bolometric and NUV luminosity, the lightcurve 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 (CSM). 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. Comment: Accepted for publication in APJL |
| Databáze: | arXiv |
| Externí odkaz: |
|