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Accretion onto Protoplanetary Discs: Implications for Globular Cluster Evolution

Published online by Cambridge University Press:  31 March 2017

T. P. G. Wijnen ,
O. R. Pols ,
F. I. Pelupessy  and
S. Portegies Zwart
T. P. G. Wijnen
Affiliation:
Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands email: [email protected] Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
O. R. Pols
Affiliation:
Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands email: [email protected]
F. I. Pelupessy
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
S. Portegies Zwart
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
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Abstract

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In the past decade, observational evidence that Globular Clusters (GCs) harbour multiple stellar populations has grown steadily. These observations are hard to reconcile with the classical picture of star formation in GCs, which approximates them as a single generation of stars. Bastian et al. recently suggested an evolutionary scenario in which a second, chemically distinct, population is formed by the accretion of chemically enriched material onto the protoplanetary disc of low-mass stars in the initial GC population. Using assumptions that represent the (dynamical) conditions in a typical GC, we investigate whether a low-mass star surrounded by a protoplanetary disc can accrete sufficient enriched material to account for the observed abundances in ‘second generation’ stars. We compare the outcome of two different smoothed particle hydrodynamics codes and focus on the lifetime and stability of the disc and on the gas accretion rate onto both the star and the disc.

Keywords

accretionaccretion discsprotoplanetary discsplanetary systems: formationstars: formationglobular clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 334 - 335
Copyright
Copyright © International Astronomical Union 2017 

References

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Wijnen, T. P. G., Pols, O. R., Pelupessy, F. I., & Portegies Zwart, S. 2015, submitted to MNRAS Google Scholar