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The chemistry of episodic accretion

Published online by Cambridge University Press:  12 October 2020

C. Rab Open the ORCID record for C. Rab [Opens in a new window] ,
V. Elbakyan ,
E. Vorobyov ,
A. Postel ,
M. Güdel ,
O. Dionatos Open the ORCID record for O. Dionatos [Opens in a new window] ,
M. Audard ,
I. Kamp Open the ORCID record for I. Kamp [Opens in a new window] ,
W.-F. Thi  and
P. Woitke
C. Rab
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, the Netherlands email: [email protected]
V. Elbakyan
Affiliation:
Research Inst. of Physics, Southern Federal Uni., Stachki 194, Rostov-on-Don 344090, Russia
E. Vorobyov
Affiliation:
Research Inst. of Physics, Southern Federal Uni., Stachki 194, Rostov-on-Don 344090, Russia University of Vienna, Dept. of Astrophysics, Türkenschanzstr. 17, 1180 Wien, Austria
A. Postel
Affiliation:
Department of Astronomy, University of Geneva, Ch. d’Ecogia 16, 1290 Versoix, Switzerland
M. Güdel
Affiliation:
University of Vienna, Dept. of Astrophysics, Türkenschanzstr. 17, 1180 Wien, Austria
O. Dionatos
Affiliation:
University of Vienna, Dept. of Astrophysics, Türkenschanzstr. 17, 1180 Wien, Austria
M. Audard
Affiliation:
Department of Astronomy, University of Geneva, Ch. d’Ecogia 16, 1290 Versoix, Switzerland
I. Kamp
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, the Netherlands email: [email protected]
W.-F. Thi
Affiliation:
MPE, Giessenbachstrasse 1, 85748 Garching, Germany
P. Woitke
Affiliation:
SUPA, School of Physics & Astronomy, University of St. Andrews, St. Andrews KY16 9SS, UK
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Abstract

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Episodic accretion is an important process in the evolution of young stars and their surroundings. A consequence of an episodic accretion event is a luminosity burst, which heats the protostellar environment and has a long lasting impact on the chemical evolution of the disk and envelope of young stars. We present a new model for the chemistry of episodic accretion based on the 2D radiation thermo-chemical disk code ProDiMo. We discuss the impact of an episodic accretion burst on the chemical evolution of CO and its observables. Furthermore we present a model for the outbursting source V883 Ori where we fitted available observational data to get an accurate physical structure that allows for a detailed study of the chemistry.

Keywords

stars: pre–main-sequenceaccretionaccretion disks(stars:) circumstellar matterastrochemistryradiative transfermethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 440 - 442
Copyright
© International Astronomical Union 2020

References

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