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An image of the dust sublimation region in the nucleus of NGC 1068
GRAVITY Collaboration, O. Pfuhl, R. Davies +40
We present near-infrared interferometric data on the Seyfert 2 galaxy NGC 1068, obtained with the GRAVITY instrument on the European Southern Observatory Very Large Telescope Inter…
Warm dust surface chemistry. H2 and HD formation
W. F. Thi, S. Hocuk, I. Kamp +4
Molecular hydrogen (H2) is the main constituent of the gas in the planet-forming disks that surround many PMS stars. H2 can be incorporated in the atmosphere of the giant planets.…
Warm dust surface chemistry in protoplanetary disks. Formation of phyllosilicates
W. F. Thi, S. Hocuk, I. Kamp +5
The origin of the reservoirs of water on Earth is debated. The Earth's crust may contain at least three times more water than the oceans. This crust water is found in the form of p…
Radiation thermo-chemical models of protoplanetary disks. Grain and polycyclic aromatic hydrocarbon charging
W. F. Thi, G. Lesur, P. Woitke +3
Context. Disks around pre-main-sequence stars evolve over time by turbulent viscous spreading. The main contender to explain the strength of the turbulence is the Magneto-Rotationa…
Probing the gaseous disk of T Tau N with CN 5-4 lines
L. Podio, I. Kamp, C. Codella +12
We present spectrally resolved Herschel/HIFI observations of the young multiple system T Tau in atomic and molecular lines. While CO, H2O, [C II], and SO lines trace the envelope a…
CO ro-vibrational lines in HD100546: A search for disc asymmetries and the role of fluorescence
R. P. Hein Bertelsen, I. Kamp, M. Goto +5
We have studied the emission of CO ro-vibrational lines in the disc around the Herbig Be star HD100546 with the final goal of using these lines as a diagnostic to understand inner…
Gas lines from the 5-Myr old optically thin disk around HD141569A. Herschel observations and modeling
Wing-Fai Thi, Christophe Pinte, Eric Pantin +20
At the distance of 99-116 pc, HD141569A is one of the nearest HerbigAe stars that is surrounded by a tenuous disk, probably in transition between a massive primordial disk and a de…
Herschel/PACS Survey of protoplanetary disks in Taurus/Auriga -- Observations of [OI] and [CII], and far infrared continuum
Christian D. Howard, Göran Sandell, William D. Vacca +17
The Herschel Space Observatory was used to observe ~ 120 pre-main-sequence stars in Taurus as part of the GASPS Open Time Key project. PACS was used to measure the continuum as wel…
Tracing the Physical Conditions in Active Galactic Nuclei with Time-Dependent Chemistry
Rowin Meijerink, Marco Spaans, Inga Kamp +3
We present an extension of the code ProDiMo that allows for a modeling of processes pertinent to active galactic nuclei and to an ambient chemistry that is time dependent. We prese…
GASPS - a Herschel survey of gas and dust in Protoplanetary Disks: Summary and Initial Statistics
W. R. F. Dent, W. F. Thi, I. Kamp +47
GASPS is a far-infrared line and continuum survey of protoplanetary and young debris disks using PACS on the Herschel Space Observatory. The survey includes [OI] at 63 microns, as…
Nature of the gas and dust around 51 Oph
W. F. Thi, F. Ménard, G. Meeus +11
Circumstellar disc evolution is paramount for the understanding of planet formation. The GASPS program aims at determining the circumstellar gas and solid mass around ~250 pre-main…
Radiation thermo-chemical models of protoplanetary discs. IV Modelling CO ro-vibrational emission from Herbig Ae discs
Wing-Fai Thi, Inga Kamp, Peter Woitke +3
The carbon monoxide rovibrational emission from discs around Herbig Ae stars and T Tauri stars with strong ultraviolet emissions suggests that fluorescence pumping from the ground…
GASPS observations of Herbig Ae/Be stars with PACS/Herschel. The atomic and molecular content of their protoplanetary discs
G. Meeus, B. Montesinos, I. Mendigutia +3
We observed a sample of 20 representative Herbig Ae/Be stars and five A-type debris discs with PACS onboard of Herschel. The observations were done in spectroscopic mode, and cover…
Detection of CH+ emission from the disc around HD100546
W. -F. Thi, F. Ménard, G. Meeus +13
Despite its importance in the thermal-balance of the gas and in the determination of primeval planetary atmospheres, the chemistry in protoplanetary discs remains poorly constraine…
Radiation thermo-chemical models of protoplanetary discs. III. Impact of inner rims on Spectral Energy Distributions
Wing-Fai Thi, Peter Woitke, Inga Kamp
We study the hydrostatic density structure of the inner disc rim around HerbigAe stars using the thermo-chemical hydrostatic code ProDiMo. We compare the Spectral Energy Distributi…