Paul Alexander - 'Mid-IR observations and modelling of NGC 520 and Arp 220'
We present mid-IR imaging with MICHELLE for NGC520 and Arp 220. We use these data together with data from the radio, through far-infrared and near-IR to constrain the star formation history of the systems. Detailed modelling of the mid-IR spectral features allows us to constrain the ionisation fraction of PAH and the grain-size distribution. We find that while little change to the Galactic grain-size distribution is required to model NGC520, we require a significant change to the size-distribution of small grains / PAHs.

Janet Bowey - 'Laboratory and observational studies of oxygen-rich dust in the Mid-Infrared'
Amorphous silicate dust has been identified in many astrophysical environments (YSOs, the ISM and surrounding evolved stars) by means of broad emission and absorption bands centred near 10 and 20 micron. However, 20 to 100 micron spectra obtained with the Infrared Space Observatory contain features of many crystalline silicates including forsterite olivine and other unidentified minerals. I shall discuss the identification of new minerals with new laboratory data obtained in collaboration with A. M. Hofmeister of Washington University.

Matt Burleigh - 'Searching for dying solar systems: planets around white dwarf stars'
Low luminosity white dwarf stars allow us to search for massive planetary and brown dwarf companions in wide orbits by direct imaging in the infra-red. The youngest, nearest white dwarf stars are descended from main sequence A and B stars, and so by targeting these objects we are in effect probing the frequency of massive planetary companions to early-type stars (which are not the primary target of current radial velocity surveys). We have a large programme on the Gemini and VLT telescopes to search for planetary companions to white dwarfs via deep near-IR imaging. The Spitzer satellite observatory now allows us to extend our programme to the mid-IR, where the contrast between star and planet will be more favourable, and where debris dust disks may also be revealed. The existence of such disks would help to explain the peculiar metal abundance patterns seen in some white dwarf atmospheres.

Monica Grady - 'Laboratory-based infrared studies of astrophysical dust'
Using state-of-the-art laboratory instrumentation, we are attempting to determine directly the chemistry, mineralogy, structure and spectral characteristics of dust grains from a variety of astrophysically-significant environments (as represented by cosmic dust particles and separates from meteorites), and to compare the results with data obtained on dust in situ by ground- and space-based instrumentation.

Mikako Matsuura - 'Mid-infrared observations of late-type stars'
The low and intermediate stars experience a large mass loss in the late stage of evolution. During the asymptotic giant branch (AGB) phase, stars lose mass at a rate of about 10^{-8} - 10^{-4} solar mass per year and circumstellar envelopes are developed. Using Spitzer space telescope, we have obtained mid-infrared spectra of AGB stars in the Large Magellanic Cloud. Several kinds of dust and molecules from circumstellar envelope and stellar atmosphere are detected. We discuss how the dust and molecular features develop, and they are different from those found in galactic AGB stars. The remnant of AGB mass loss is found as a nebula around the post-AGB stars and planetary nebulae (PNe) which are in the following evolutionary stage after AGB phase. Mixed chemistry is known in some of post-AGB stars and PNe; in a single object, both PAHs and (crystalline) silicates are detected. In theory, these two kinds of dust grains can not be formed at the same time from the same gas. It has been proposed that these dust grains were formed in different time, and should be found in spatially separated places. Using mid-infrared images of post-AGB stars and PNe obtained with TIMMI-2, we show the location of PAHs in these objects, and discuss the locations of PAHs is spatially separated from that of crystalline silicates.

Radmila Topalovic - 'Unidentified Infrared Emission in the Red Rectangle'
Spectra of the unidentified IR emission from the Red Rectangle in the mid-IR region (using MICHELLE on UKIRT) have been investigated as a function of distance from the central binary star HD 44179. The evolution of the spectral profiles of these bands provides useful insight into the nature of the carriers and suggests the possible appearance of different carriers along the biconical interfaces of this unusual protoplanetary nebula.

Serena Viti - 'High resolution water spectra of low mass stars using Michelle'
I will highlight the fundamental importance of high resolution mid-infrared observations using Michelle on Gemini in the determination of the effective temperatures for M and brown dwarfs. In the 10-12 microns region, individual rotational water vapour transitions are present. Our investigations of these transitions in sunspots show that a large dynamic range is available for temperature analysis and that they are more straight forward to model than the vibration-rotation transitions which dominate the spectral energy distribution of M dwarfs at shorter wavelengths. High resolution observations of this mid-IR region for dwarfs can only be done with Michelle on Gemini.

Ian Waddington - 'The Spitzer Wide-area Infrared Extragalactic survey'
SWIRE is the largest of the Spitzer Space Telescope legacy surveys. We are imaging an area of approximately 50 square degrees in all seven bands (3.6-160 microns). I will present some early results from the survey, focussing particularly on the large-scale clustering of galaxies selected at 3.6 microns.

Mark Wyatt - 'Mid-IR Imaging of Warm Debris Disks'
The few Vega-type stars whose dusty debris disks have been resolved show this dust lies in cool Kuiper belt-like rings. However, roughly half of all debris disk candidates exhibit little or no cool dust, since their dust emission peaks at around 25 microns. By analogy with the solar system, these warm disks would lie mid-way between the asteroid and Kuiper belt regions in their systems. As such these disks could represent the Kuiper belt-like rings of truncated planetary systems, or the destruction of massive interplanetary asteroid/comet belts. In this talk I will present the results of a mid-IR imaging programme of warm debris disk candidates undertaken using TIMMI2 and TReCS.