NOAO > Observing Info > Approved Programs > 2005A-0502
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NOAO > Observing Info > Approved Programs > 2005A-0502 |
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PI: Greg Aldering, Lawrence Berkeley National Laboratory, GAldering@lbl.gov
Address: Physics Department, 1 Cyclotron Rd/ MS 50R-5032, Berkeley, CA 94720, USA
CoI: Peter Nugent, LBNL
CoI: Saul Perlmutter, LBNL
CoI: Lifan Wang, LBNL
CoI: Rollin Thomas, LBNL
CoI: Brian Lee, LBNL
CoI: Richard Scalzo, LBNL
Title: IR Observations of Hubble Flow Type Ia Supernovae
Abstract:
We propose to use NOAO facilities to obtain NIR spectroscopy and
photometry of Type Ia supernovae in the smooth Hubble-flow -- where
relative redshifts accurately translate into relative luminosities -- as
the first step in building a statistically significant sample of multi-
epoch NIR spectra and NIR lightcurves. These measurements are central
to advancing our understanding of Type Ia supernova as standardized
distance indicators. Gemini-South with GNIRS will be used to obtain
near-IR spectroscopy at several epochs, while CTIO 4-m with ISPI and
KPNO 4-m with FLAMINGOS will obtain near-IR photometry of these same
Type Ia supernovae. (Both components are essential, as the photometry
will be used to flux-calibrate the spectroscopy while the spectroscopy
will be used to K-correct the photometry.) This work is part of a major
international campaign combining multi-epoch UV HST observations of
these supernovae with ground-based optical and near-IR follow-up
programs including photometry, spectroscopy and spectropolarimetry.
These observations will enable both empirical studies and state-of-the
art modeling of the physics and progenitors of SNe Ia. Our studies will
form the basis for the next phase of precision cosmology measurements
using SNe Ia, and will allow us to fully capitalize on the substantial
past and on-going investments in Type Ia supernova cosmology by NOAO.
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 > 2005A-0502 |
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