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Powerful H Emission and Star Formation on the Interacting Galaxy System Arp 143: Observations with Spitzer and GALEX
P. Beirão, P. N. Appleton, B. R. Brandl +3
We present new mid-infrared (m) and ultraviolet (1539 -- 2316 Å) observations of the interacting galaxy system Arp 143 (NGC 2444/2445) from the Spitzer Space Telescope and…
Average Infrared Galaxy Spectra From Spitzer Flux Limited Samples
Daniel W. Weedman, James R. Houck
The mid-infrared spectroscopic analysis of a flux-limited sample of galaxies with fv(24um) > 10 mJy is presented. Sources observed are taken from the Spitzer First Look Survey (FLS…
The Magellanic zoo: Mid-infrared Spitzer spectroscopy of evolved stars and circumstellar dust in the Magellanic Clouds
G. C. Sloan, K. E. Kraemer, P. R. Wood +4
We observed a sample of evolved stars in the Large and Small Magellanic Clouds (LMC and SMC) with the Infrared Spectrograph on the Spitzer Space Telescope. Comparing samples from t…
The Most Luminous Starbursts in the Universe
Daniel W. Weedman, James R. Houck
A summary of starburst luminosities based on PAH features is given for 243 starburst galaxies with 0 < z < 2.5, observed with the Spitzer Infrared Spectrograph. Luminosity vLv(7.7u…
Spitzer IRS Spectra of Optically Faint IRAS Sources
Lusine Sargsyan, Areg Mickaelian, Daniel Weedman +1
Extragalactic sources from the IRAS Faint Source Catalog (FSC) which have the optically faintest magnitudes (E > 18) were selected by spatial coincidence with a source in the FIRST…
Spitzer Mid-Infrared Spectroscopy of Distant X-ray Luminous AGN
Kate Brand, Dan W. Weedman, Vandana Desai +7
We present mid-infrared spectroscopy of a sample of 16 optically faint infrared luminous galaxies obtained with the Infrared Spectrograph (IRS) on the Spitzer Space Telescope. Thes…
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…
Blue Compact Dwarf Galaxies with Spitzer: The Infrared/Radio Properties
Yanling Wu, V. Charmandaris, J. R. Houck +4
We study the correlation between the radio, mid-infrared and far-infrared properties for a sample of 28 blue compact dwarf (BCD) and low metallicity star-forming galaxies observed…
Spatially Resolved Spitzer-IRS Spectroscopy of the Central Region of M82
P. Beirão, B. R. Brandl, P. N. Appleton +6
We present high spatial resolution (~ 35 parsec) 5-38 um spectra of the central region of M82, taken with the Spitzer Infrared Spectrograph. From these spectra we determined the fl…
Dust Properties and Star-Formation Rates in Star-Forming Dwarf Galaxies
J. L. Rosenberg, Yanling Wu, Emeric Le Floc'h +5
We have used the Spitzer Space Telescope to study the dust properties of a sample of star-forming dwarf galaxies. The differences in the mid-infrared spectral energy distributions…
Chemical composition and mixing in giant HII regions: NGC3603, 30Doradus, and N66
V. Lebouteiller, J. Bernard-Salas, B. Brandl +5
We investigate the chemical abundances of NGC3603 in the Milky Way, of 30Doradus in the Large Magellanic Cloud, and of N66 in the Small Magellanic Cloud. Mid-infrared observations…
Elemental Abundances of Blue Compact Dwarfs from mid-IR Spectroscopy with Spitzer
Yanling Wu, J. Bernard-Salas, V. Charmandaris +4
We present a study of elemental abundances in a sample of thirteen Blue Compact Dwarf (BCD) galaxies, using the 10--37m high resolution spectra obtained with Spitzer/IRS.…
Obscuration in extremely luminous quasars
M. Polletta, D. Weedman, S. Hoenig +3
The spectral energy distributions and infrared (IR) spectra of a sample of obscured AGNs selected in the mid-IR are modeled with recent clumpy torus models to investigate the natur…
Neon and Sulfur Abundances of Planetary Nebulae in the Magellanic Clouds
J. Bernard-Salas, S. R. Pottasch, S. Gutenkunst +2
The chemical abundances of neon and sulfur for 25 planetary nebulae (PNe) in the Magellanic Clouds are presented. These abundances have been derived using mainly infrared data from…
Spitzer Mid-Infrared Spectroscopy of 70um-Selected Distant Luminous Infrared Galaxies
Kate Brand, Dan W. Weedman, Vandana Desai +7
We present mid-infrared spectroscopy obtained with the Spitzer Space Telescope of a sample of 11 optically faint, infrared luminous galaxies selected from a Spitzer MIPS 70um imagi…
The Neon Abundance in the Ejecta of QU Vul From Late-Epoch IR Spectra
Robert D. Gehrz, Charles E. Woodward, L. Andrew Helton +10
We present ground-based SpectroCam-10 mid-infrared, MMT optical, and Spitzer Space Telescope IRS mid-infrared spectra taken 7.62, 18.75, and 19.38 years respectively after the outb…
Spitzer Spectra of a 10 mJy Galaxy Sample and the Star Formation Rate in the Local Universe
J. R. Houck, D. W. Weedman, E. Le Floc'h +1
A complete flux-limited sample of 50 galaxies is presented having f_ν(24um) > 10mJy, chosen from a survey with the Multiband Imaging Photometer on Spitzer (MIPS) of 8.2 deg^{2} wit…
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…
Spitzer/IRS Imaging and Spectroscopy of the luminous infrared galaxy NGC 6052 (Mrk 297)
D. G. Whelan, D. Devost, V. Charmandaris +2
We present photometric and spectroscopic data of the interacting starburst galaxy NGC 6052 obtained with the Spitzer Space Telescope. The mid-infrared (MIR) spectra of the three br…
The Dust and Gas Around beta Pictoris
C. H. Chen, A. Li, C. Bohac +12
We have obtained Spitzer IRS 5.5 - 35 micron spectroscopy of the debris disk around beta Pictoris. In addition to the 10 micron silicate emission feature originally observed from t…
PAH Strength and the Interstellar Radiation Field around the Massive Young Cluster NGC3603
V. Lebouteiller, B. Brandl, J. Bernard-Salas +2
We present spatial distribution of polycyclic aromatic hydrocarbons and ionized gas within the Galactic giant HII region NGC3603. Using the IRS instrument on board the Spitzer Spac…
Crystalline silicates and dust processing in the protoplanetary disks of the Taurus young cluster
Dan M. Watson, Jarron M. Leisenring, Elise Furlan +15
We characterize the crystalline silicate content and spatial distribution of small dust grains in a large sample of protoplanetary disks in the Taurus-Auriga young cluster, using S…
Dust in the Extremely Metal-Poor Blue Compact Dwarf Galaxy IZw18: The Spitzer Mid-Infrared View
Yanling Wu, V. Charmandaris, L. K. Hunt +5
IZw18, a blue compact dwarf (BCD) galaxy with the 2nd lowest metallicity measured in a star-forming object, has been observed with all three instruments on board the Spitzer Space…