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102 papers · 1 filter
The HIFI spectral survey of AFGL 2591 (CHESS). III. Chemical structure of the protostellar envelope
Maja Kazmierczak-Barthel, Dimitri Semenov, Floris van der Tak +2
We aim to understand the rich chemical composition of AFGL 2591, a prototypical isolated high-mass star-forming region. Based on HIFI and JCMT data, the molecular abundances of spe…
Surprising detection of an equatorial dust lane on the AGB star IRC+10216
S. V. Jeffers, M. Min, L. B. F. M. Waters +6
Understanding the formation of planetary nebulae remains elusive because in the preceding asymtotic giant branch (AGB) phase these stars are heavily enshrouded in an optically thic…
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…
The ASTRO-H X-ray Astronomy Satellite
Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley +250
The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions developed by the Institute of Space and Astronautical Science (ISAS), with a planne…
The structure of disks around Herbig Ae/Be stars as traced by CO ro-vibrational emission
G. van der Plas, M. E. van den Ancker, L. B. F. M. Waters +1
We study the emission and absorption of CO ro-vibrational lines in the spectra of intermediate mass pre-main-sequence stars with the aim to determine both the spatial distribution…