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An Initial Look at the Far Infrared-Radio Correlation within Nearby Star-forming Galaxies using the Spitzer Space Telescope
E. J. Murphy, R. Braun, G. Helou +25
(Abridged) We present an initial look at the far infrared-radio correlation within the star-forming disks of four nearby, nearly face-on galaxies (NGC 2403, NGC 3031, NGC 5194, and…
Protostars, Dust Globules, and a Herbig-Haro Object in the LMC Superbubble N51D
Y. -H. Chu, R. A. Gruendl, C. -H. R. Chen +9
Using Spitzer Space Telescope and Hubble Space Telescope observations of the superbubble N51D, we have identified three young stellar objects (YSOs) in dust globules, and made the…
The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039
D. C. Hines, D. E. Backman, J. Bouwman +17
We report the discovery of a debris system associated with the Myr old G3/5V star HD 12039 using {\it Spitzer Space Telescope} observations from 3.6 -- 160m. An observ…
Understanding Radio-Selected Thermal Sources in M 33: Ultraviolet, Optical, Near-Infrared, Spitzer Mid-Infrared, and Radio Observations
Brent A. Buckalew, Henry A. Kobulnicky, Jonathan M. Darnel +18
We present ultraviolet, optical, near-infrared, Spitzer mid-infrared, and radio images of 14 radio-selected objects in M 33. These objects are thought to represent the youngest pha…
The Excitation of Extended Red Emission: New Constraints on its Carrier From HST Observations of NGC 7023
Adolf N. Witt, Karl D. Gordon, Uma P. Vijh +3
The carrier of the dust-associated photoluminescence process causing the extended red emission (ERE) in many dusty interstellar environments remains unidentified. Several competing…
Spitzer Observations Of The Supergiant Shell Region In IC 2574
John M. Cannon, Fabian Walter, George J. Bendo +15
We present spatially resolved Spitzer imaging of the supergiant shell region of the M81 group dwarf galaxy IC 2574 obtained as part of the Spitzer Infrared Nearby Galaxies Survey.…
Infrared Spectral Energy Distributions of Nearby Galaxies
D. A. Dale, G. J. Bendo, C. W. Engelbracht +25
The Spitzer Infrared Nearby Galaxies Survey (SINGS) is carrying out a comprehensive multi-wavelength survey on a sample of 75 nearby galaxies. The 1-850um spectral energy distribut…
Star Formation in NGC5194 (M51a): The Panchromatic View from GALEX to Spitzer
D. Calzetti, R. C. Kennicutt, L. Bianchi +32
(Abridged) Far ultraviolet to far infrared images of the nearby galaxy NGC5194, from Spitzer, GALEX, Hubble Space Telescope and ground--based data, are used to investigate local an…
The nature of the red disk-like galaxies at high redshift: dust attenuation and intrinsically red stellar populations
D. Pierini, C. Maraston, K. D. Gordon +1
We investigate which conditions of dust attenuation and stellar populations allow models of dusty, continuously star-forming, bulge-less disk galaxies at 0.8<z<3.2 to meet the diff…
Blue Luminescence and the Presence of Small PAHs in the ISM
Uma P. Vijh, Adolf N. Witt, Karl D. Gordon
Blue Luminescence (BL) was first discovered in a proto-planetary nebula, the Red Rectangle (RR) surrounding the post-AGB star HD 44179. BL has been attributed to fluorescence by sm…
Discovery of Five New R Coronae Borealis Stars in the MACHO Galactic Bulge Database
A. Zaniewski, Geoffrey C. Clayton, D. L. Welch +3
We have identified five new R Coronae Borealis (RCB) stars in the Galactic bulge using the MACHO Project photometry database, raising the total number of known Galactic RCB stars t…
Detection of a massive dust shell around the Type II supernova SN 2002hh
M. J. Barlow, B. E. K. Sugerman, J. Fabbri +11
Dust emission from the Type II supernova SN 2002hh in NGC 6946 has been detected at mid-infrared wavelengths by the Spitzer Space Telescope from 590 to 758 days after outburst and…
Formation and Evolution of Planetary Systems: Cold Outer Disks Associated with Sun-like stars
Jinyoung Serena Kim, Dean C. Hines, Dana E. Backman +24
We present the discovery of debris systems around three solar mass stars based upon observations performed with the Spitzer Space Telescope as part of a Legacy Science Program, ``t…
Metallicity Effects on Mid-Infrared Colors and the 8 micron PAH Emission in Galaxies
C. W. Engelbracht, K. D. Gordon, G. H. Rieke +3
We examine colors from 3.6 micron to 24 micron as a function of metallicity (O/H) for a sample of 34 galaxies. The galaxies range over 2 orders of magnitude in metallicity. They di…
Infrared Echoes near the Supernova Remnant Cassiopeia A
O. Krause, G. H. Rieke, S. M. Birkmann +9
Two images of Cassiopeia A obtained at 24 micrometer with the Spitzer Space Telescope over a one year time interval show moving structures outside the shell of the supernova remnan…
FUSE Measurements of Far Ultraviolet Extinction. II. Magellanic Cloud Sight Lines
Stefan I. B. Cartledge, Geoffrey C. Clayton, Karl D. Gordon +8
We present an extinction analysis of 9 paths through the LMC and SMC based on FUSE observations. To date, just two LMC sight lines have probed dust grain composition and size distr…
Far Infrared Observations of Radio Quasars and FR II Radio Galaxies
Y. Shi, G. H. Rieke, D. C. Hines +6
We report MIPS photometry of 20 radio-loud quasars and galaxies at 24 and 70 um (and of five at 160 um). We combine this sample with additional sources detected in the far infrared…
Detection of Near-IR CO Absorption Bands in R Coronae Borealis Stars
Emily D. Tenenbaum, Geoffrey C. Clayton, Martin Asplund +8
R Coronae Borealis (RCB) stars are hydrogen-deficient, carbon-rich pulsating post-AGB stars that experience massive irregular declines in brightness caused by circumstellar dust fo…
FUSE Measurements of Far Ultraviolet Extinction. I. Galactic Sight Lines
U. J. Sofia, M. J. Wolff, B. Rachford +8
We present extinction curves that include data down to far ultraviolet wavelengths (FUV; 1050 - 1200 A) for nine Galactic sight lines. The FUV extinction was measured using data fr…
Reduction Algorithms for the Multiband Imaging Photometer for Spitzer
K. D. Gordon, G. H. Rieke, C. W. Engelbracht +27
We describe the data reduction algorithms for the Multiband Imaging Photometer for Spitzer (MIPS) instrument. These algorithms were based on extensive preflight testing and modelin…
Ultraviolet Dust Grain Properties in Starburst Galaxies: Evidence from Radiative Transfer Modeling and Local Group Extinction Curves
Karl D. Gordon
This paper summarizes the evidence of the ultraviolet properties of dust grains found in starburst galaxies. Observations of starburst galaxies clearly show that the 2175 A feature…
Measuring Extinction Curves of Lensing Galaxies
Christina McGough, Geoffrey C. Clayton, Karl D. Gordon +1
We critique the method of constructing extinction curves of lensing galaxies using multiply imaged QSOs. If one of the two QSO images is lightly reddened or if the dust along both…
A Spitzer Study of Dusty Disks in the Scorpius-Centaurus OB Association
C. H. Chen, M. Jura, K. D. Gordon +1
We have obtained Spitzer Space Telescope MIPS observations of 40 F- and G-type common proper motion members of the Scorpius-Centaurus OB Association with ages between 5 and 20 Myr…