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Silicates in Ultra-Luminous Infrared Galaxies
M. M. Sirocky, N. A. Levenson, M. Elitzur +2
We analyze the mid-infrared (MIR) spectra of ultraluminous infrared galaxies (ULIRGs) observed with the Spitzer Space Telescope's Infrared Spectrograph. Dust emission dominates the…
The nature of star formation in distant ultraluminous infrared galaxies selected in a remarkably narrow redshift range
D. Farrah, C. Lonsdale, D. Weedman +6
We present mid-infrared spectra of thirty two high redshift ultraluminous infrared galaxies, selected via the stellar photospheric feature at rest-frame 1.6um, and an observed-fram…
Decomposing Dusty Galaxies. I. Multi-Component Spectral Energy Distribution Fitting
J. A. Marshall, T. L. Herter, L. Armus +4
We present a new multi-component spectral energy distribution (SED) decomposition method and use it to analyze the ultraviolet to millimeter wavelength SEDs of a sample of dusty in…
High resolution mid-infrared spectroscopy of ultraluminous infrared galaxies
D. Farrah, J. Bernard-Salas, H. W. W. Spoon +8
(Abridged) We present R~600, 10-37um spectra of 53 ULIRGs at z<0.32, taken using the IRS on board Spitzer. All of the spectra show fine structure emission lines of Ne, O, S, Si and…
The distribution of silicate strength in Spitzer spectra of AGNs and ULIRGs
Lei Hao, D. W. Weedman, H. W. W. Spoon +4
A sample of 196 AGNs and ULIRGs observed by the Infrared Spectrograph (IRS) on Spitzer is analyzed to study the distribution of the strength of the 9.7 micron silicate feature. Ave…
Mid-IR Galaxy Classification Based on Silicate Obscuration and PAH Equivalent Width
H. W. W. Spoon, J. A. Marshall, J. R. Houck +5
We present a new diagnostic diagram for mid-infrared spectra of infrared galaxies based on the equivalent width of the 6.2 micron PAH emission feature and the strength of the 9.7 m…