Abstract
Using three-dimensional (3D) magnetohydrodynamical (MHD) nested-grid simulations, the fragmentation of a rotating magnetized molecular cloud core is studied. An isothermal rotating magnetized cylindrical cloud in hydrostatic balance is considered. We studied non-axisymmetric evolution of the cloud. It is found that non-axisymmetry hardly evolves in the early phase, but it begins to grow after the gas contracts and forms a thin disk. The disk formation and thus growth of non-axisymmetric perturbation are strongly promoted by rotation and magnetic field strength. We found two types of fragmentations: fragmentation from a ring and that from a bar. These two types of fragmentations occur in thin adiabatic cores with the thickness being smaller than 1/4 of the radial size. For the fragments to survive, they should be formed in a heavily elongated barred core or a flat round disk. In the models showing fragmentation, outflows from respective fragments are found as well as that driven by the rotating bar or the disk.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Abt, H.A.: 1983, ARA,A 21, 343.
Boss, A.P.: 1993, ApJ 410, 157.
Boss, A.P.: 2002, ApJ 568, 743.
Boss, A.P., Myhill, E.A.: 1995, Api 451, 218.
Duquennoy, A., Mayor, M.: 1991, A,A 248, 485.
Fukuda, F., Hanawa, T.: 1999, ApJ 517, 226.
Kroupa, P., Burkert, A.: 2001, Api 555, 945.
Larson, R.B.: 1969, MNRAS 145, 271.
Machida, M.N.: 2003, Binary Star Formation and Mass Outflow in the Molecular Cloud Core, PhD thesis, Hokkaido U.
Matsumoto, T., Hanawa, T., Nakamura, F.: 1997, ApJ 478, 569.
Matsumoto, T., Nakamura, F., Hanawa, T.: 1994, PASJ 46, 243.
Miyama, S.M., Hayashi, C., Narita, S.: 1984, Api 279, 621.
Nakamura, F., Hanawa, T.: 1997, ApJ 480, 701.
Norman, M.L., Wilson, J.R., Barton, R.T.: 1980, Api 239, 968.
Stodólkiewicz, J.S.: 1963, Acta Astron. 13, 30.
Tohline, J.E.: 1982, Fundam. Cosm. Phys. 8, 1.
Tomisaka, K.: 1995, Api 438, 226.
Tomisaka, K.: 1998, Api 502, L163.
Tomisaka, K.: 2000, Api 528, L41.
Tomisaka, K.: 2002, Api 575, 306.
Truelove, J.K., Klein, R.I., Mckee, C.F., Holliman, J.H., Howell, L.H., Greenough, J.A.: 1997, Api 489, L179.
Tsuribe, T., Inutsuka, S.: 1999, Api 523, LI55.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2004 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Tomisaka, K., Machida, M.N., Matsumoto, T. (2004). Contraction and Fragmentation of Magnetized Rotating Clouds and Formation of Binary Systems. In: de Castro, A.I.G., Heyer, M., Vázquez-Semadeni, E., Rebolo, R., Tagger, M., Pudritz, R.E. (eds) Magnetic Fields and Star Formation. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0491-5_23
Download citation
DOI: https://doi.org/10.1007/978-94-017-0491-5_23
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-6602-2
Online ISBN: 978-94-017-0491-5
eBook Packages: Springer Book Archive