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The Spitzer c2d Legacy Results: Star-Formation Rates and Efficiencies; Evolution and Lifetimes

Myers, Philip C.; Dunham, Michael M.; Alcalá, Juan M. +15 more

The c2d Spitzer Legacy project obtained images and photometry with both IRAC and MIPS instruments for five large, nearby molecular clouds. Three of the clouds were also mapped in dust continuum emission at 1.1 mm, and optical spectroscopy has been obtained for some clouds. This paper combines information drawn from studies of individual clouds int…

Spitzer Quasar and Ulirg Evolution Study (QUEST). IV. Comparison of 1 Jy Ultraluminous Infrared Galaxies with Palomar-Green Quasars

Lutz, D.; Genzel, R.; Sturm, E. +16 more

We report the results from a comprehensive study of 74 ultraluminous infrared galaxies (ULIRGs) and 34 Palomar-Green (PG) quasars within z ~ 0.3 observed with the Spitzer Infrared Spectrograph (IRS). The contribution of nuclear activity to the bolometric luminosity in these systems is quantified using six independent methods that span a range in w…

Laboratory Spectra of the CO₂ Bending-Mode Feature in Interstellar Ice Analogues Subject to Thermal Processing

Whittet, D. C. B.; Gerakines, P. A.; White, D. W. +1 more

The infrared absorption features of solid carbon dioxide have been detected by space-based observatories in nearly all lines of sight probing the dense interstellar medium (ISM). It has also been shown that the absorption feature of solid CO₂ near 658 cm^-1 (15.2 µm) should be a sensitive indicator of the physical condit…