Michael P. Fitzgerald

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Job enrichment is one method that has been used to increase employee satisfaction and work motivation. Hackman and Oldham's (1976) job characteristics model has served as the foundation for many job enrichment efforts. In particular, a considerable amount of research has been devoted to the study of the job characteristics-job satisfaction relation. The(More)
Fomalhaut, a bright star 7.7 parsecs (25 light-years) from Earth, harbors a belt of cold dust with a structure consistent with gravitational sculpting by an orbiting planet. Here, we present optical observations of an exoplanet candidate, Fomalhaut b. Fomalhaut b lies about 119 astronomical units (AU) from the star and 18 AU of the dust belt, matching(More)
We report the first scattered light detection of a dusty debris disk surrounding the F2V star HD 15115 using the Hubble Space Telescope in the optical, and Keck adaptive optics in the near-infrared. The most remarkable property of the HD 15115 disk relative to other debris disks is its extreme length asymmetry. The east side of the disk is detected to ∼315(More)
We report the detection of a ring of warm dust in the edge-on disk surrounding HD 32297 with the GeminiN/MICHELLE mid-infrared imager. Our N-band image shows elongated structure consistent with the orientation of the scattered-light disk. The Fν(11.2μm) = 49.9±2.1 mJy flux is significantly above the 28.2±0.6 mJy photosphere. Subtraction of the stellar point(More)
Using the Advanced Camera for Surveys aboard the Hubble Space Telescope, we have discovered dust-scattered light from the debris disk surrounding the F2 V star HD 15745. The circumstellar disk is detected between 2.0 and 7.5 radius, corresponding to 128–480 AU radius. The circumstellar disk morphology is asymmetric about the star, resembling a fan, and(More)
Debris disks around main sequence stars are produced by the erosion and evaporation of unseen parent bodies, which are potential building blocks of planets. Such planets may imprint dynamical signatures on the structure of the debris disk. AUMicroscopii (GJ 803) is a compelling object to study in the context of disk evolution across different spectral(More)
We present the first detection and mapping of the HD 32297 debris disk at 1.3 mm with the Combined Array for Research in Millimeter-wave Astronomy (CARMA). With a subarcsecond beam, this detection represents the highest angular resolution (sub)mm debris disk observation made to date. Our model fits to the spectral energy distribution from the CARMA flux and(More)
The Gemini Planet Imager is a dedicated facility for directly imaging and spectroscopically characterizing extrasolar planets. It combines a very high-order adaptive optics system, a diffraction-suppressing coronagraph, and an integral field spectrograph with low spectral resolution but high spatial resolution. Every aspect of the Gemini Planet Imager has(More)
We present the first scattered light images of debris disks around a K star (HD 53143) and an F star (HD 139664) using the coronagraphic mode of the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope (HST). With ages 0.3 1 Gyr, these are among the oldest optically detected debris disks. HD 53143, viewed ∼45 from edge-on, does not show(More)