Search Publications
Neptune's HCl upper limit from Herschel/HIFI
Irwin, P. G. J.; Teanby, N. A.; Gould, B.
Here we search for hydrogen chloride (HCl) in Neptune's stratosphere using observations of the 1876.22 GHz J=3-2 transition from the Heterodyne Instrument for the Far-Infrared (HIFI) on Herschel. Observations comprise a 7.2 hr disc-averaged integration, originally designed to investigate stratospheric methane. Significant HCl emission was not dete…
Neptune's carbon monoxide profile and phosphine upper limits from Herschel/SPIRE: Implications for interior structure and formation
Irwin, P. G. J.; Teanby, N. A.; Moses, J. I.
On Neptune, carbon monoxide and phosphine are disequilibrium species, and their abundance profiles can provide insights into interior processes and the external space environment. Here we use Herschel/SPIRE (Spectral and Photometric Imaging REceiver) observations from 14.9-51.5 cm-1 to obtain abundances from multiple CO and PH3
Haumea's thermal emission revisited in the light of the occultation results
Fornasier, S.; Lellouch, E.; Marton, G. +9 more
A recent multi-chord occultation measurement of the dwarf planet (136108) Haumea (Ortiz et al., 2017) revealed an elongated shape with the longest axis comparable to Pluto's mean diameter. The chords also indicate a ring around Haumea's equatorial plane, where its largest moon, Hi'iaka, is also located. The Haumea occultation size estimate (size o…
Corrigendum to "Neptune's carbon monoxide profile and phosphine upper limits from Herschel/SPIRE" (Icarus, vol 319, p86-98, 2019)
Irwin, P. G. J.; Teanby, N. A.; Moses, J. I.
The authors would like to publish the below information which was incorrectly published in its original version.
Retrieval of H2O abundance in Titan's stratosphere: A (re)analysis of CIRS/Cassini and PACS/Herschel observations
Lellouch, E.; Irwin, P. G. J.; Teanby, N. A. +6 more
Since its first measurement 20 years ago by the Infrared Space Observatory (ISO), the water (H2O) mole fraction in Titan's stratosphere remains uncertain due to large differences between the determinations from available measurements. More particularly, the recent measurements made from the Herschel observatory (PACS and HIFI) estimated…
The abundance, vertical distribution and origin of H2O in Titan’s atmosphere: Herschel observations and photochemical modelling
Hartogh, Paul; Lellouch, Emmanuel; Lara, Luisa M. +4 more
Disk-averaged observations of water vapor in Titan’s atmosphere acquired with the Herschel satellite are reported. We use a combination of unresolved measurements of three H2O rotational lines at 66.4, 75.4 and 108.0 µm with the PACS instrument, and spectrally-resolved observations of two other transitions at 557 GHz (538 µm…