NOAO > Observing Info > Approved Programs > 2012A-0295
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NOAO > Observing Info > Approved Programs > 2012A-0295 |
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PI: Eric Y. Hsiao, Carnegie Institution of Washington, hsiao@lco.cl
Address: Carnegie Observatories, Las Campanas Observatory, Casilla 601, La Serena, Chile
CoI: Peter Hoeflich, Florida State University
CoI: Tiara Diamond, Florida State University
CoI: Christopher R. Burns, Carnegie Institution of Washington
CoI: Christopher L. Gerardy, Florida State University
CoI: Nidia Morrell, Carnegie Institution of Washington
CoI: Brendan Penney, Florida State University
CoI: Mark M. Phillips, Carnegie Institution of Washington
CoI: Christopher J. Pritchet, University of Victoria
CoI: Maximilian Stritzinger, Stockholm Observatory
Title: Late-time near-infrared spectroscopy of SN 2011fe
Abstract:
While Type Ia supernovae (SNe Ia) are playing an instrumental role in
deciphering the nature of dark energy, aspects of their progenitors and
explosions still remain unknown. The proximity of SN 2011fe allows it to stay
brighter than H=17 well beyond one year past explosion and provides a unique
opportunity to make exquisitely detailed near-infrared (NIR) spectroscopic
observations of a SN Ia at late epochs. We propose to observe the evolution
of the 1.65 um [Fe II] line of SN 2011fe at four epochs between 150 and 300
days past B-band maximum. The emission profiles of the well-isolated NIR [Fe
II] lines will trace out the global kinematic distribution of radioactive
material in the expanding supernova ejecta. These pioneering observations
will allow us to probe both the magnetic field in the progenitor star and the
three-dimensional distribution of iron group elements in the expanding
ejecta. The findings will have direct consequences for the use of SNe Ia in
high precision cosmology.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2012A-0295 |
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