Detection of warm water vapour in Taurus protoplanetary discs by Herschel
P Rivi�re-Marichalar, F M�nard, WF Thi, I Kamp…�- Astronomy &�…, 2012 - aanda.org
Line spectra of 68 Taurus T Tauri stars were obtained with the Herschel-PACS
(Photodetector Array Camera and Spectrometer) instrument as part of the GASPS (GAS
evolution in Protoplanetary Systems) survey of protoplanetary discs. A careful examination
of the linescans centred on the [OI] 63.18 μm fine-structure line unveiled a line at 63.32 μm
in some of these spectra. We identify this line with the 8 18→ 7 07 transition of ortho-water. It
is detected confidently (ie,> 3σ) in eight sources, ie,~ 24% of the sub-sample with gas-rich�…
(Photodetector Array Camera and Spectrometer) instrument as part of the GASPS (GAS
evolution in Protoplanetary Systems) survey of protoplanetary discs. A careful examination
of the linescans centred on the [OI] 63.18 μm fine-structure line unveiled a line at 63.32 μm
in some of these spectra. We identify this line with the 8 18→ 7 07 transition of ortho-water. It
is detected confidently (ie,> 3σ) in eight sources, ie,~ 24% of the sub-sample with gas-rich�…
Gas modelling in the disc of HD 163296
We present detailed model fits to observations of the disc around the Herbig Ae star HD
163296. This well-studied object has an age of~ 4 Myr, with evidence of a circumstellar disc
extending out to~ 540 AU. We use the radiation thermo-chemical disc code ProDiMo to
model the gas and dust in the circumstellar disc of HD 163296, and attempt to determine the
disc properties by fitting to observational line and continuum data. These include new
Herschel/PACS observations obtained as part of the open-time key program GASPS (GAS in�…
163296. This well-studied object has an age of~ 4 Myr, with evidence of a circumstellar disc
extending out to~ 540 AU. We use the radiation thermo-chemical disc code ProDiMo to
model the gas and dust in the circumstellar disc of HD 163296, and attempt to determine the
disc properties by fitting to observational line and continuum data. These include new
Herschel/PACS observations obtained as part of the open-time key program GASPS (GAS in�…
An integrated approach to evaluate emerging contaminants in drinking water
The chemical stock of emerging contaminants in Brazilian drinking water is of great interest
due to the poor water quality at surface water intakes. In addition, little is known about the
effect of some contaminants, such as endocrine disrupting chemicals (EDCs), which may be
present in both raw and treated water. The aim of this work was to evaluate selected
emerging contaminants in Brazilian waters using both chemical and biological analyses.
Sampling sites were established in different municipalities based upon raw water quality�…
due to the poor water quality at surface water intakes. In addition, little is known about the
effect of some contaminants, such as endocrine disrupting chemicals (EDCs), which may be
present in both raw and treated water. The aim of this work was to evaluate selected
emerging contaminants in Brazilian waters using both chemical and biological analyses.
Sampling sites were established in different municipalities based upon raw water quality�…