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Lack of PAH emission toward low-mass embedded young stellar objects
V. C. Geers, E. F. van Dishoeck, K. M. Pontoppidan +4
PAHs have been detected toward molecular clouds and some young stars with disks, but have not yet been associated with embedded young stars. We present a sensitive mid-IR spectrosc…
Coagulation of small grains in disks: the influence of residual infall and initial small-grain content
C. Dominik, C. P. Dullemond
Turbulent coagulation in protoplanetary disks is known to operate on timescale far shorter than the lifetime of the disk. In the absence of mechanisms that replenish the small dust…
A representative particle approach to coagulation and fragmentation of dust aggregates and fluid droplets
A. Zsom, C. P. Dullemond
Context: There is increasing need for good algorithms for modeling the aggregation and fragmentation of solid particles (dust grains, dust aggregates, boulders) in various astrophy…
Soft X-ray components in the hard state of accreting black holes
Caroline D'Angelo, Dimitrios Giannios, Cornelis Dullemond +1
Recent observations of two black hole candidates (GX 339-4 and J1753.5-0127) in the low-hard state (L_X/L_Edd ~ 0.003-0.05) suggest the presence of a cool accretion disk very close…
Planetesimal formation around the snow line in MRI-driven turbulent protoplanetary disks
F. Brauer, Th. Henning, C. P. Dullemond
The formation of planetesimals in protoplanetary disks due to collisional sticking of smaller dust aggregates has to face at least two severe obstacles, namely the rapid loss of ma…
Size-sorting dust grains in the surface layers of protoplanetary disks
C. P. Dullemond, C. Dominik
Aims: We wish to investigate what the effect of dust sedimentation is on the observed 10 mum feature of protoplanetary disks and how this may affect the interpretation of the obser…