University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, January 29th 2016
2:30 pm:
Speaker: Robert Gehrz, MIfA, University of Minnesota
Subject: Infrared Observations of Novae in the SOFIA Era

Classical novae may contribute to some of the isotopic anomalies that are
present in the remnants of the primitive solar system. We describe the way
infrared (IR) photometric and spectroscopic observations can quantify the
physical parameters of nova explosions and their contributions to the
Inter-Stellar Medium (ISM). Metal abundances in the ejecta can be deduced
from both IR dust emission features and forbidden line emission. We show
that some novae have produced ejecta extremely overabundant in CNO, Ne,
Mg, Al, and Si. The properties of nova dust are compared to those of
grains in pre-planetary nebulae and comet nuclei. We describe space
observations of novae from the Spitzer Space Telescope and anticipate the
impact that the new NASA Stratospheric Observatory for Infrared Astronomy
(SOFIA) will have on future infrared studies of novae.

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