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Can we expect the massive discs around young stellar objects class O-I to be a birthplace of planetesimal?

Published online by Cambridge University Press:  05 January 2015

Valeriy N. Snytnikov
Affiliation:
Boreskov Institute of Catalysis SB RAS Pr. Academika Lavrentieva, 5, 630090, Novosibirsk, Russia email: [email protected], [email protected], [email protected] Novosibirsk State University, Str. Pirogova, 2, 630090, Novosibirsk, Russia
Olga P. Stoyanovskaya
Affiliation:
Boreskov Institute of Catalysis SB RAS Pr. Academika Lavrentieva, 5, 630090, Novosibirsk, Russia email: [email protected], [email protected], [email protected] Novosibirsk State University, Str. Pirogova, 2, 630090, Novosibirsk, Russia
Olga A. Stadnichenko
Affiliation:
Boreskov Institute of Catalysis SB RAS Pr. Academika Lavrentieva, 5, 630090, Novosibirsk, Russia email: [email protected], [email protected], [email protected] Novosibirsk State University, Str. Pirogova, 2, 630090, Novosibirsk, Russia
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Abstract

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Possibility of large bodies formation in massive discs of young stellar objects (YSO) class O-I was investigated. On the stage of YSO O-I the whole of factors: chemical composition of gas and solids, chemical catalytic reactions, the disc self-gravitation, the increased ratio of solids to gas surface density, adiabatic gas cooling provides favorable conditions for gravitational instabilities development. We simulated 3D dynamics of gas and dust under self-consistent gravitational field and reproduced the formation and evolution of the disc around the protostar. We found that for stars of Solar mass there are regimes when the disc of variable mass is unstable for the development of fast gravitational instabilities.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2014 

References

Snytnikov, V. N. & Stoyanovskaya, O. P., 2013, MNRAS, 428, 2CrossRefGoogle Scholar
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