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Observations of water with Herschel/HIFI toward the high-mass protostar AFGL 2591
Y. Choi, F. F. S. van der Tak, E. F. van Dishoeck +2
Water is a sensitive tracer of physical conditions in star-forming regions because of its large abundance variations between hot and cold regions. We use spectrally resolved observ…
Ro-vibrational excitation of an organic molecule (HCN) in protoplanetary disks
Simon Bruderer, Daniel Harsono, Ewine F. van Dishoeck
(Abridged) Organic molecules are important constituents of protoplanetary disks. Their ro-vibrational lines observed in the near- and mid-infrared are commonly detected toward T Ta…
Herschel Survey of Galactic OH+, H2O+, and H3O+: Probing the Molecular Hydrogen Fraction and Cosmic-Ray Ionization Rate
Nick Indriolo, D. A. Neufeld, M. Gerin +19
In diffuse interstellar clouds the chemistry that leads to the formation of the oxygen bearing ions OH+, H2O+, and H3O+ begins with the ionization of atomic hydrogen by cosmic rays…
Astrochemistry of dust, ice and gas: introduction and overview
Ewine F. van Dishoeck
A brief introduction and overview of the astrochemistry of dust, ice and gas and their interplay is presented, aimed at non-specialists. The importance of basic chemical physics st…
Gas and dust structures in protoplanetary disks hosting multiple planets
P. Pinilla, M. de Juan Ovelar, S. Ataiee +4
Transition disks have dust-depleted inner regions and may represent an intermediate step of an on-going disk dispersal process, where planet formation is probably in progress. Rece…
Herschel/PACS view of disks around low-mass stars and brown dwarfs in the TW Hya association
Yao Liu, Gregory J. Herczeg, Munan Gong +6
We conducted Herschel/PACS observations of five very low-mass stars or brown dwarfs located in the TW Hya association with the goal of characterizing the properties of disks in the…