Search Publications
Interstellar Ice: The Infrared Space Observatory Legacy
Whittet, D. C. B.; Tielens, A. G. G. M.; Boogert, A. C. A. +1 more
We present 2.5-30 µm spectra from the Short-Wavelength Spectrometer of the Infrared Space Observatory for a total of 23 sources. The sources include embedded young stellar objects spanning a wide range of mass and luminosity, together with field stars sampling quiescent dark clouds and the diffuse interstellar medium. Expanding on results of…
The 24 Micron Source Counts in Deep Spitzer Space Telescope Surveys
Rigby, J. R.; Le Floc'h, E.; Dole, H. +20 more
Galaxy source counts in the infrared provide strong constraints on the evolution of the bolometric energy output from distant galaxy populations. We present the results from deep 24 µm imaging from Spitzer surveys, which include ~5×104 sources to an 80% completeness of ~=60 µJy. The 24 µm counts rapidly rise at near-Eu…
The Anatomy of Star Formation in NGC 300
Helou, G.; Roussel, H.; Fazio, G. G. +19 more
The Spitzer Space Telescope was used to study the mid- to far-infrared properties of NGC 300 and to compare dust emission to Hα to elucidate the heating of the interstellar medium (ISM) and the star formation cycle at scales smaller than 100 pc. The new data allow us to discern clear differences in the spatial distribution of 8 µm dust emiss…
Polycyclic Aromatic Hydrocarbon Contribution to the Infrared Output Energy of the Universe at z ~= 2
Le Floc'h, E.; Dole, H.; Lagache, G. +10 more
We present an updated phenomenological galaxy evolution model to fit the Spitzer 24, 70, and 160 µm number counts, as well as all the previous mid- and far-infrared observations. Only a minor change of the comoving luminosity density distribution in the previous model (Lagache, Dole, & Puget), combined with a slight modification of the s…
The Nature of Faint 24 Micron Sources Seen in Spitzer Space Telescope Observations of ELAIS-N1
Elbaz, D.; Reach, W. T.; Chary, R. +7 more
The Spitzer Space Telescope has undertaken the deepest ever observations of the 24 µm sky in the European Large Area ISO Survey (ELAIS-N1) field, with the Multiband Imaging Photometer (MIPS) instrument, as part of GOODS Science Verification observations. We present completeness-corrected extragalactic source counts down to 24 µm flux d…
Cold Dust in Early-Type Galaxies. I. Observations
Brighenti, Fabrizio; Mathews, William G.; Bregman, Jesse D. +1 more
We describe far-infrared observations of early-type galaxies selected from the Infrared Space Observatory (ISO) archive. This rather inhomogeneous sample includes 39 giant elliptical galaxies and 14 S0 (or later) galaxies. These galaxies were observed with the array photometer PHOT on-board the ISO satellite using a variety of different observing …
Imaging of the Supernova Remnant Cassiopeia A with the Multiband Imaging Photometer for Spitzer (MIPS)
Egami, E.; Gehrz, R. D.; Krause, O. +20 more
We present new images of the supernova remnant (SNR) Cas A observed in the 24 and 70 µm bands of the Spitzer Space Telescope (Spitzer). The IR emission correlates well with the Si X-ray and optical [S II] emission but poorly with either the synchrotron-dominated radio structure or the continuum X-ray emission. The IR is therefore dominated b…
The Off-Nuclear Starbursts in NGC 4038/4039 (The Antennae Galaxies)
Surace, J. A.; Fazio, G. G.; Huang, J. -S. +7 more
Imaging of the Antennae galaxies (NGC 4038/4039) with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope reveals large concentrations of star-forming activity away from both nuclei of the two merging galaxies. These images confirm earlier findings based on Infrared Space Observatory (ISO) data with lower angular resolution. The sh…
Extragalactic Source Counts at 24 Microns in the Spitzer First Look Survey
Im, M.; Frayer, D. T.; Helou, G. +18 more
We present the Spitzer Multiband Imaging Photometer 24 µm source counts in the Extragalactic First Look Survey (FLS) main, verification, and European Large Area ISO Survey N1 fields. Spitzer's increased sensitivity and efficiency in large areal coverage over previous infrared telescopes, coupled with the enhanced sensitivity of the 24 µ…
Classification of Spectra from the Infrared Space Observatory PHT-S Database
Kraemer, Kathleen E.; Price, Stephan D.; Walker, Helen J. +1 more
We have classified over 1500 infrared spectra obtained with the PHT-S spectrometer aboard the Infrared Space Observatory according to the system developed for the Short Wavelength Spectrometer (SWS) spectra by Kraemer et al. The majority of these spectra contribute to subclasses that are either underrepresented in the SWS spectral database or cont…