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Missing water in Class I protostellar disks
Daniel Harsono, Magnus Persson, Alyssa Ramos +10
Water is a key volatile that provides insights into the initial stages of planet formation. The low water abundances inferred from water observations toward low-mass protostellar o…
Nitrogen isotope fractionation in protoplanetary disks
Ruud Visser, Simon Bruderer, Paolo Cazzoletti +3
Aims: The two stable isotopes of nitrogen, 14N and 15N, exhibit a range of abundance ratios both inside and outside the solar system. The elemental ratio in the solar neighborhood…
Imaging the water snowline in a protostellar envelope with HCO
Merel L. R. van 't Hoff, Magnus V. Persson, Daniel Harsono +5
Snowlines are key ingredients for planet formation. Providing observational constraints on the locations of the major snowlines is therefore crucial for fully connecting planet com…
Oxygen budget in low-mass protostars: the NGC1333-IRAS4A R1 shock observed in [OI] at 63 um with SOFIA-GREAT
L. E. Kristensen, A. Gusdorf, J. C. Mottram +5
In molecular outflows from forming low-mass protostars, most oxygen is expected to be locked up in water. However, Herschel observations have shown that typically an order of magni…
Outflows, infall and evolution of a sample of embedded low-mass protostars. The William Herschel Line Legacy (WILL) survey
J. C. Mottram, E. F. van Dishoeck, L. E. Kristensen +22
[Abridged] We present spectroscopic observations in HO, CO and related species with \textit{Herschel} HIFI and PACS, as well as ground-based follow-up with the JCMT and APEX…
Water around IRAS15398-3359 observed with ALMA
P. Bjerkeli, J. K. Jørgensen, E. A. Bergin +9
How protostars accrete mass is one of the fundamental problems of star formation. High column densities and complex kinematical structures make direct observations challenging and…