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Detection of the Water Reservoir in a Forming Planetary System
The Heterodyne Instrument for the Far-Infrared on board the Herschel Space Observatory has detected emission lines from both spin isomers of cold water vapor from the disk around the young star TW Hydrae, hinting at a water ice reservoir equivalent to several thousand Earth oceans in mass. Expand
Water in star-forming regions with Herschel (WISH). II. Evolution of 557 GHz 110-101 emission in low-mass protostars
Context. Water is a key tracer of dynamics and chemistry in low-mass star-forming regions, but spectrally resolved observations have so far been limited in sensitivity and angular resolution, andExpand
Water deuterium fractionation in the low-mass protostar NGC1333-IRAS2A
Context. Although deuterium enrichment of water may provide an essential piece of information in the understanding of the formation of comets and protoplanetary systems, only a few studies up to nowExpand
Water in star-forming regions with Herschel (WISH) - III. Far-infrared cooling lines in low-mass young stellar objects
Context. Understanding the physical phenomena involved in the earlierst stages of protostellar evolution requires knowledge of the heating and cooling processes that occur in the surroundings of aExpand
First Detection of Water Vapor in a Pre-stellar Core
Water is a crucial molecule in molecular astrophysics as it controls much of the gas/grain chemistry, including the formation and evolution of more complex organic molecules in ices. Pre-stellarExpand
Modelling Herschel observations of hot molecular gas emission from embedded low-mass protostars
Aims. Young stars interact vigorously with their surroundings, as evident from the highly rotationally excited CO (up to Eu/k = 4000 K) and H2O emission (up to 600 K) detected by the Herschel SpaceExpand
APEX-CHAMP+ high-J CO observations of low-mass young stellar objects - I. The HH 46 envelope and outflow
Context. The spectacular outflow of HH 46/47 is driven by HH 46 IRS 1, an embedded Class I Young Stellar Object (YSO). Although much is known about this region from extensive optical and infraredExpand
Waterfalls around protostars. Infall motions towards Class 0/I envelopes as probed by water
Context. For stars to form, material must fall inwards from core scales through the envelope towards the central protostar. While theories of how this takes place have been around for some time, theExpand
Complex molecules toward low-mass protostars: the Serpens Core
Gas-phase complex organic molecules are commonly detected toward high-mass protostellar hot cores. Detections toward low-mass protostars and outflows are comparatively rare, and a larger sample isExpand
Embedded protostars in the dust, ice, and gas in time (DIGIT) Herschel key program: continuum SEDs, and an inventory of characteristic far-infrared lines from PACs spectroscopy
We present 50-210 μm spectral scans of 30 Class 0/I protostellar sources, obtained with Herschel-PACS, and 0.5-1000 μm spectral energy distributions, as part of the Dust, Ice, and Gas in Time KeyExpand