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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 ,
Olga P. Stoyanovskaya  and
Olga A. Stadnichenko
Valeriy N. Snytnikov
Affiliation:
Boreskov Institute of Catalysis SB RAS Pr. Academika Lavrentieva, 5, 630090, Novosibirsk, Russia email: snyt@catalysis.ru, stop@catalysis.ru, zasypoa@catalysis.ru 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: snyt@catalysis.ru, stop@catalysis.ru, zasypoa@catalysis.ru 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: snyt@catalysis.ru, stop@catalysis.ru, zasypoa@catalysis.ru 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.

Keywords

Young Stellar Object (YSO) class O-Igravitational instabilityself-gravitating clump formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S310: Complex Planetary Systems , July 2014 , pp. 225 - 226
Copyright
Copyright © International Astronomical Union 2014 

References

Snytnikov, V. N. & Stoyanovskaya, O. P., 2013, MNRAS, 428, 2CrossRefGoogle Scholar
Snytnikov, V. N., Stoyanovskaya, O. P., & Stadnichenko, O. A., 2013, EPJ Web of Conferences, 46, 07004Google Scholar
Snytnikov, V. N. & Stadnichenko, O. A., 2011, Astron. Rep., 55, 214.Google Scholar
Herbst, E. & van Dishoeck, E. F., 2009, Ann. Rev. Astron. and Astrophys., 47, 427Google Scholar