Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21536306l&link_type=abstract
American Astronomical Society, AAS Meeting #215, #363.06; Bulletin of the American Astronomical Society, Vol. 42, p.551
Mathematics
Logic
Scientific paper
We will present a submillimeter (submm) to mid-infrared (mid-IR) observational assessment of star-formation in a small sample of elliptical galaxies known to be rich in cold-gas and -dust and have merger morphological traces. The galaxies star-formation was first inferred from submm observations of excess continuum emission and then independently confirmed with mid-IR spectroscopic detections of PAH emission. The PAH data were obtained exploiting the superior sensitivity Spitzer's Infrared Spectrograph (IRS) and are been used to quantify and compare the radiation field associated with the star-formation in local regions within and among the sample galaxies. If the star-formation is a result of a merger or accretion event, the level of the star-formation can be used quantify its beginning and evolution, and thus time since the merger event that triggered the star-formation. In this light, the presented study will not only demonstrate the usefulness of mid-IR spectroscopy (from IRS or, e.g., future instruments on SOFIA) in determining star-formation constraints of these galaxies but also of their evolutionary sequence (or ageing).
Bregman Jesse D.
Davidson Jacqueline
Leeuw Lerothodi
Temi Pasquale
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