Search Publications
Centimetre-wave continuum radiation from the ρ Ophiuchi molecular cloud
Paladini, Roberta; Lim, Tanya; Casassus, Simon +8 more
The ρ Oph molecular cloud is undergoing intermediate-mass star formation. Ultraviolet radiation from its hottest young stars heats and dissociates exposed layers, but does not ionize hydrogen. Only faint radiation from the Rayleigh-Jeans tail of ~10-100 K dust is expected at wavelengths longwards of ~3 mm. Yet cosmic background imager (CBI) observ…
The mid-infrared [SIV]/[NeII] versus [NeIII]/[NeII] correlation
Groves, Brent; Nefs, Bas; Brandl, Bernhard
The mid-infrared (MIR) ratio [NeIII]15.6µm/[NeII]12.8µm is a strong diagnostic of the ionization state of emission-line objects, due to its use of only strong neon emission lines only weakly affected by extinction. However, this ratio is not available to ground-based telescopes as only a few spectroscopic windows …
High-resolution polarimetry of Parsamian 21: revealing the structure of an edge-on FUOri disc
Apai, D.; Ábrahám, P.; Kóspál, Á. +6 more
We present the first high spatial resolution near-infrared direct and polarimetric observations of Parsamian 21, obtained with the Nasmyth Adaptive Optics System-CONICA instrument at the Very Large Telescope (VLT). We complemented these measurements with archival infrared observations, such as Hubble Space Telescope (HST)/Wide Field Planetary Came…
Physical parameters for Orion KL from modelling its ISO high-resolution far-IR CO line spectrum
White, G. J.; Barlow, M. J.; Cernicharo, J. +5 more
As part of the first high-resolution far-infrared (far-IR) spectral survey of the Orion Kleinmann-Low (KL) region, we observed 20 CO emission lines with Jup = 16 to 39 (upper levels from ~752 to 4294 K above the ground state). Observations were taken using the Long Wavelength Spectrometer on board the Infrared Space Observatory (ISO), i…
IRAS22036+5306: an Al2O3 oxide-dominated post-AGB star
Maldoni, M. M.; Ireland, T. R.; Robinson, G.
Radiative transfer modelling of the Infrared Space Observatory (ISO) spectrum of IRAS22036+5306 has shown that its unusual 11-µm band can be suitably modelled with an alumina-olivine mixture substantially dominated by the former. The results of this work add further credence to recent findings that significant amounts of Al2O…