241 citations · 2.3k across the 71 of their papers we have counts for
18 papers · 1 filter
Encounter-driven accretion in young stellar clusters - A connection to FUors?
S. Pfalzner
Context: The brightness of FUors increases by several magnitudes within one to several years. The currently favoured explanation for this brightness boost is that of dramatically r…
Encounters in the ONC - observing imprints of star-disc interactions
C. Olczak, S. Pfalzner, A. Eckart
The external destruction of protoplanetary discs in a clustered environment acts mainly due to two mechanisms: gravitational drag by stellar encounters and evaporation by strong st…
Accretion bursts in young stars driven by cluster environment
S. Pfalzner, J. Tackenberg, M. Steinhausen
The standard picture of accretion is a steady flow of matter from the disc onto the young star - a concept which assumes the star-disc system to be completely isolated. However, in…
Quasi-binarity of massive stars in young dense clusters - the case of the ONC
S. Pfalzner, C. Olczak
Observations indicate that in young stellar clusters the binary fraction for massive stars is higher than for solar mass stars. For the Orion Nebula Cluster (ONC) there is a binary…
The nearby QSO host I Zw 1: The stellar disk and adjacent objects
J. Scharwaechter, A. Eckart, S. Pfalzner +2
The relation between tidal interactions, starbursts, and the onset and/or fueling of active galactic nuclei (AGN) is a matter of debate. I Zw 1 is considered as the prototypical na…
Cluster-assisted accretion for massive stars
S. Pfalzner
Gravitational interactions in very young high-density stellar clusters can to some degree change the angular momentum in the circumstellar discs surrounding initially the majority…