Search Publications
The initial conditions of isolated star formation - V. ISOPHOT imaging and the temperature and energy balance of pre-stellar cores
Ward-Thompson, D.; André, P.; Kirk, J. M.
ISO data taken with the long-wavelength imaging photo-polarimeter ISOPHOT are presented of 18 pre-stellar cores at three far-infrared wavelengths, 90, 170 and 200µm. Most of the cores are detected clearly at 170 and 200µm, but only one is detected strongly at 90µm, indicating that mostly they are very cold, with typical temperatu…
The percentage of stellar light re-radiated by dust in late-type Virgo Cluster galaxies
Tuffs, Richard J.; Popescu, Cristina C.
We show that the mean percentage of stellar light re-radiated by dust is ~30 per cent for the Virgo Cluster late-spirals measured with ISOPHOT by Tuffs et al. A strong dependence of this ratio with morphological type was found, ranging from typical values of ~15 per cent for early spirals to up to ~50 per cent for some late spirals. The extreme BC…
A new method for ISOCAM data reduction - II. Mid-infrared extragalactic source counts in the ELAIS Southern field
Pozzi, F.; Franceschini, A.; Serjeant, S. +5 more
We present the 15-µm extragalactic source counts from the Final Analysis Catalogue of the European Large Area ISO Survey (ELAIS) Southern hemisphere field S1, extracted using the Lari method. The large number of extragalactic sources (~350) detected over this area between about 0.5 and 100 mJy guarantee a high statistical significance of the…
The SCUBA 8-mJy survey - II. Multiwavelength analysis of bright submillimetre sources
Ivison, R. J.; Dunlop, J. S.; Serjeant, S. +13 more
We present the results of a multiwavelength study of the 19 most significant submillimetre (submm) sources detected in the SCUBA 8-mJy survey. As described in Scott et al. , this survey covers ~=260arcmin2 using the submillimetre camera SCUBA, to a limiting source detection limit S 850µm ~=8mJy. One advantage of this re…
The dual dust chemistries of planetary nebulae with [WCL] central stars
Barlow, M. J.; Liu, X. -W.; Cohen, Martin +1 more
The rather rare class of central stars of planetary nebulae that show very low-excitation Wolf-Rayet spectra has been a subject of great interest, particularly in the infrared, since its discovery in the late 1960s. Further peculiarities have been found with the advent of infrared spectroscopy from ISO. Notably, these objects simultaneously betray…
Observations of hyperluminous infrared galaxies with the Infrared Space Observatory: implications for the origin of their extreme luminosities
McMahon, Richard; Verma, Aprajita; Rowan-Robinson, Michael +1 more
We present 7-180 µm photometry of a sample of hyperluminous infrared galaxies (HyLIGs) obtained with the photometer and camera mounted on the Infrared Space Observatory. We have used radiative transfer models of obscured starbursts and dusty torii to model their spectral energy distributions (SEDs). We find that IRAS F00235+1024, IRAS F14218…
Observations of the Hubble Deep Field South with the Infrared Space Observatory - II. Associations and star formation rates
Oliver, Seb; Elbaz, David; Franceschini, Alberto +15 more
We present results from a deep mid-infrared survey of the Hubble Deep Field South (HDF-S) region performed at 6.7 and 15µm with the ISOCAM instrument on board the Infrared Space Observatory (ISO ). We find reliable optical/near-infrared associations for 32 of the 35 sources detected in this field by Oliver et al. (Paper I): eight of them are…
Crystalline silicates in the envelopes and discs around oxygen-rich asymptotic giant branch stars
Suh, Kyung-Won
We have modelled dust envelopes and discs around oxygen-rich asymptotic giant branch (AGB) stars using optical properties of amorphous and crystalline silicate dust grains, paying close attention to the infrared observations of the stars including the Infrared Space Observatory (ISO ) data. Using the opacity functions for various mixtures of amorp…
Observations of the Hubble Deep Field South with the Infrared Space Observatory - I. Observations, data reduction and mid-infrared source counts
Oliver, Seb; Elbaz, David; Franceschini, Alberto +14 more
We present results from a deep mid-infrared survey of the Hubble Deep Field South (HDF-S) region performed at 6.7 and 15µm with the ISOCAM instrument on board the Infrared Space Observatory (ISO ). The final map in each band was constructed by the co-addition of four independent rasters, registered using bright sources securely detected in a…
The 69-µm forsterite band as a dust temperature indicator
Waters, L. B. F. M.; Ade, P. A. R.; Barlow, M. J. +6 more
A band of pure crystalline forsterite (100 per cent Mg2SiO4) occurs at 69.67µm at room temperature (295K) for olivines with >~10 per cent Fe the corresponding feature is at >~73µm. The Mg-rich forsterite feature is observed in a variety of ISO LWS spectra, but the corresponding Fe-rich olivine feature is not…