106 citations · 297 across the 14 of their papers we have counts for
6 papers · 1 filter
A tale of two isotopes: Spatial variation in HCN fractionation toward young cores
Sigurd S. Jensen, Silvia Spezzano, Olli Sipilä +3
Context. Isotopic fractionation can serve as a powerful tracer of the chemical evolution during star and planet formation. To accurately interpret observations, it is crucial to id…
A 3D physico-chemical model of a pre-stellar core. II. Dynamic chemical evolution in a pre-stellar core model using tracer particles
S. S. Jensen, S. Spezzano, P. Caselli +3
This work explores the differences between static and dynamically evolving physico-chemical models of pre-stellar cores. A 3D MHD model of a pre-stellar core embedded in a dynamic…
Rejuvenating infall: a crucial yet overlooked source of mass and angular momentum
M. Kuffmeier, S. S. Jensen, T. Haugbølle
MHD models and the observation of accretion streamers confirmed that protostars can undergo late accretion events after the initial collapse phase. To provide better constraints, w…
ALMA observations of water deuteration: A physical diagnostic of the formation of protostars
S. S. Jensen, J. K. Jørgensen, L. E. Kristensen +5
The deuterium fractionation of water can serve as a tracer for the chemical and physical evolution of water during star formation and can constrain the origin of water in Solar Sys…
Episodic accretion: the interplay of infall and disc instabilities
Michael Kuffmeier, Søren Frimann, Sigurd S. Jensen +1
Using zoom-simulations carried out with the adaptive mesh-refinement code RAMSES with a dynamic range of up to we investigate the accretion profil…
Explaining the luminosity spread in young clusters: proto and pre-main sequence stellar evolution in a molecular cloud environment
Sigurd S. Jensen, Troels Haugbølle
Hertzsprung-Russell diagrams of star forming regions show a large luminosity spread. This is incompatible with well-defined isochrones based on classic non-accreting protostellar e…