Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1111..253g&link_type=abstract
PROBING STELLAR POPULATIONS OUT TO THE DISTANT UNIVERSE: CEFALU 2008, Proceedings of the International Conference. AIP Conferen
Astronomy and Astrophysics
Astronomy
Supernova Remnants, Astronomical Observations, Radiative Transfer, Scattering
Scientific paper
We present serendipitous GALEX detections of fast rising Ultraviolet emission from two SNLS Type II plateau supernovae at z = 0.185 and 0.324. SNLS optical photometry and VLT spectroscopy 2 weeks after the GALEX detections link the onset of the UV emission to the time of shock breakout. The UV light curves are in good agreement with our models for the immediate aftermath of shock breakout in a red supergiant (RSG) progenitor. We do not observe, and the GALEX observations likely missed, the bright (MFUV~-20), short (<1 hr) radiative precursor predicted from stellar evolution models for the structure of the RSG envelope. Based on the observed detection efficiency of our study we make predictions for the detection rage of shock breakouts from Type II SNe by the GALEX Time Domain Survey in parallel with Pan-STARRS 1.
Dessart Luc
Gezari Suvi
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