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NGC 6153: a super-metal-rich planetary nebula?
Barlow, M. J.; Cohen, M.; Liu, X. -W. +3 more
We have obtained deep optical spectra of the planetary nebula NGC 6153, both along its minor axis and by uniformly scanning a long slit across the whole nebula. The scanned spectra, when combined with the nebular total Hβ flux, yield integrated fluxes for all the lines (~400) in our spectra, which are rich in strong recombination lines from C, N, …
The European Large Area ISO Survey - I. Goals, definition and observations
Elbaz, D.; Genzel, R.; Omont, A. +67 more
We describe the European Large Area ISO Survey (ELAIS). ELAIS was the largest single Open Time project conducted by ISO, mapping an area of 12deg2 at 15µm with ISOCAM and at 90µm with ISOPHOT. Secondary surveys in other ISO bands were undertaken by the ELAIS team within the fields of the primary survey, with 6deg2…
Quantitative analysis of WC stars: constraints on neon abundances from ISO-SWS spectroscopy
Hillier, D. John; Morris, Patrick W.; Crowther, Paul A. +3 more
Neon abundances are derived in four Galactic WC stars - γ2Vel (WR11, WC8+O7.5III), HD156385 (WR90, WC7), HD192103 (WR135, WC8) and WR146 (WC5+O8) - using mid-infrared fine-structure lines obtained with ISO-SWS. Stellar parameters for each star are derived using the non-local thermodynamic equilibrium model atmospheric code of Hillier &a…
The European Large Area ISO Survey - II. Mid-infrared extragalactic source counts
McMahon, Richard G.; Serjeant, Stephen; Clements, David L. +20 more
We present preliminary source counts at 6.7 and 15µm from the preliminary analysis of the European Large Area ISO Survey, with limiting flux densities of ~2mJy at 15µm and ~1mJy at 6.7µm. We separate the stellar contribution from the extragalactic using identifications with automated plate measurement sources made with the likeli…
The European Large Area ISO Survey - III. 90-µm extragalactic source counts
Genzel, R.; Danese, L.; Puget, J. -L. +17 more
We present results and source counts at 90µm extracted from the preliminary analysis of the European Large Area ISO Survey (ELAIS). The survey covered about 12deg2 of the sky in four main areas and was carried out with the ISOPHOT instrument onboard the Infrared Space Observatory (ISO). The survey is at least an order of magnitude…
Hot dust in two hard Chandra X-ray sources
Fabian, A. C.; Gandhi, P.; Wilman, R. J.
The two brightest hard X-ray sources discovered serendipitously by Chandra in the field of the lensing cluster A2390 are found to have ISOCAM counterparts at 6.7 and 15µm. We use this fact, together with their non-detection by SCUBA at 850µm, as the basis for dusty radiative transfer modelling of their infrared spectral energy distribu…
The infrared jet in 3C 66B
Hardcastle, M. J.; Birkinshaw, M.; Worrall, D. M. +1 more
We present images of infrared (IR) emission from the radio jet in 3C 66B. Data at three wavelengths (4.5, 6.75 and 14.5µm) were obtained using the Infrared Space Observatory. The 6.75-µm image clearly shows an extension aligned with the radio structure. The jet was also detected in the 14.5-µm image, but not at 4.5µm. The r…