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Turbulent Fragmentation and Star Formation

  • Javier Ballesteros-Paredes

Abstract

We review the main results from recent numerical simulations of turbulent fragmentation and star formation. Specifically, we discuss the observed scaling relationships, the “quiescent” (subsonic) nature of many star-forming cores, their energy balance, their synthesized polarized dust emission, the ages of stars associated with the molecular gas from which they have formed, the mass spectra of clumps, and the density and column density probability distribution function of the gas. We then give a critical discussion on recent attempts to explain and/or predict the star formation efficiency and the stellar initial mass function from the statistical nature of turbulent fields. Finally, it appears that turbulent fragmentation alone cannot account for the final stages of fragmentation: although the turbulent velocity field is able to produce filaments, the spatial distribution of cores in such filaments is better explained in terms of gravitational fragmentation.

Keywords

ISM: fragmentation Clouds Turbulence kinematics and dynamics stars: formation 

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References

  1. Arons, J. and Max, C.E.: 1975, ApJL 196, L77.ADSCrossRefGoogle Scholar
  2. Alves, J., Lada, C.J., and Lada, E.A.: 2001, Nature 409, 159.ADSCrossRefGoogle Scholar
  3. Avila-Reese, V. and Vazquez-Semadeni, E.: 2001, Api 553, 645.ADSGoogle Scholar
  4. Ballesteros-Paredes, J.: in: M. Avillez and D. Breitschwerdt eds. From Observations to Self-Consistent Modeling of the Interstellar Medium,Astrophysics and Space Science, in press. Ballesteros-Paredes, J., Hartmann, L., and Vazquez-Semadeni, E.: 1999b, Api 527, 285.Google Scholar
  5. Ballesteros-Paredes, J., Klessen, R.S., and Vazquez-Semadeni, E.: 2003. ApJ in press.Google Scholar
  6. Ballesteros-Paredes, J. and Mac Low, M.: 2002, ApJ 570, 734.ADSCrossRefGoogle Scholar
  7. Ballesteros-Paredes, J. and Vdzquez-Semadeni, E.: 1995, Revista Mexicana de Astronomia y Astrofisica Conference Series 3, 105.ADSGoogle Scholar
  8. Ballesteros-Paredes, J. and Vazquez-Semadeni, E.: 1997, Star Formation Near and Far,81.Google Scholar
  9. Ballesteros-Paredes, J., Vazquez-Semadeni, E., and Scalo, J.: 1999a, Api 515, 286.ADSGoogle Scholar
  10. Blitz, L. and Shu, F.H.: 1980, ApJ 238, 148.ADSCrossRefGoogle Scholar
  11. Blitz, L. and Williams, J.P.: 1997, ApJL 488, L145.ADSCrossRefGoogle Scholar
  12. Bonazzola, S., Heyvaerts, J., Falgarone, E., Perault, M., and Puget, J.L.: 1987, AA 172, 293.ADSGoogle Scholar
  13. Bonnor, W.B.: 1956, MNRAS 116, 351.ADSMathSciNetGoogle Scholar
  14. Brunt, C.: 2003. Api 583, 280.ADSGoogle Scholar
  15. Caselli, P., Benson, P.J., Myers, P.C. and Tafalla, M.: 2002, Api 572, 238.ADSGoogle Scholar
  16. Chandrasekhar, S. and Fermi, E.: 1953, Api 118, 116.ADSMathSciNetGoogle Scholar
  17. Cho, J.,Lazarian, A. and Vishniac, E.: 2002, astro-ph/0205286.Google Scholar
  18. Faundez, S., Bronfman, L., Garay, G., Chini, R., May, J., and Nyman, L.: 2003, AA submitted.Google Scholar
  19. Walder, R. and Folini, D.: 1998, AA 330, L21.ADSGoogle Scholar
  20. Ebert, R.: 1955, Zeitschrift far Astrophysik 36, 222.ADSGoogle Scholar
  21. Elmegreen, B.G.: 1993, in: Protostars and Planets III,p. 97.Google Scholar
  22. Elmegreen, B.G.: 1997, Api 486, 944.ADSGoogle Scholar
  23. Evans, N.J., Rawlings, J.M.C., Shirley, Y.L. and Mundy, L.G.: 2001, Api 557, 193.ADSGoogle Scholar
  24. Gammie, C.F., Y.-T. Lin, Y.-T., Stone, J.M., and Ostriker, E.C.: 2003. Api in press.Google Scholar
  25. Goldreich, P. and Kwan, J.: 1974, Api 189, 441.ADSGoogle Scholar
  26. Goodman, A.A., Barranco, J.A., Wilner, D.J. and Heyer, M.H.: 1998, Api 504, 223. Goodwin, S.P., Whitworth, A.P. and Ward-Thompson, D.: 2004, AandA 414, 633.Google Scholar
  27. Hartmann, L.: 2002, Api 578, 914.ADSGoogle Scholar
  28. Hartmann, L.: 2003, Api 585, 398.ADSGoogle Scholar
  29. Hartmann, L., Ballesteros-Paredes, J. and Bergin, E.A.: 2001, Api 562, 852.ADSGoogle Scholar
  30. Hunter, J.H., Sandford, M.T., Whitaker, R.W. and Klein, R.I.: 1986, Api 305, 309.Google Scholar
  31. Heitsch, F., Mac Low, M., and Klessen, R.S.: 2001a, Api 547, 280.ADSGoogle Scholar
  32. Heitsch, F., Zweibel, E.G., Mac Low, M., Li, P. and Norman, M.L.: 2001b, Api 561, 800.ADSGoogle Scholar
  33. Jijina, J., Myers, P.C. and Adams, F.C.: 1999, ApJS 125, 161.ADSCrossRefGoogle Scholar
  34. Johnstone, D., Wilson, C.D., Moriarty-Schieven, G., Joncas, G., Smith, G., Gregersen, E. and Fich, M.: 2000, Api 545, 327.ADSGoogle Scholar
  35. Kegel, W.H.: 1989, AA 225, 517.ADSGoogle Scholar
  36. Klein, R.I. and Woods, D.T.: 1998, Api 497, 777.ADSGoogle Scholar
  37. Klessen, R.S.: 2000, Api 535, 869.ADSGoogle Scholar
  38. Klessen, R.S.: 2001, Api 556, 837.ADSGoogle Scholar
  39. Klessen, R.S., Ballesteros-Paredes, J., Vâzquez-Semadeni, E. and Durân-Rojas, C.: 2003. Api,submitted.Google Scholar
  40. Klessen, R.S., Heitsch, F., and Mac Low, M.: 2000, Api 535, 887.ADSGoogle Scholar
  41. Kolmogorov, A.N.: 1941, Dokl. Akad. Nauk SSSR 30 301 (reprinted in Proc. R. Soc. London A 434 9 [1991]).Google Scholar
  42. Kolmogorov, A.N.: 1962, J. Fluid Mech. 13, 82.ADSCrossRefzbMATHMathSciNetGoogle Scholar
  43. Koyama, H. and Inutsuka, S.: 2002, ApiL 564, L97.Google Scholar
  44. Kurtz, S., Cesaroni, R., Churchwell, E., Hofner, P. and Walmsley, C.M.: 2000, in: Protostars and Planets IV,p. 299.Google Scholar
  45. Larson, R.B.: 1981, MNRAS 194, 809.ADSGoogle Scholar
  46. Larson, R.B.: 1985, MNRAS 214, 379.ADSGoogle Scholar
  47. Larson, R.B.: 2003, Rep. Prog. Phys.,submitted.Google Scholar
  48. Li,Y., Klessen, R.S. and Mac Low, M.-M.: 2003. Api 592, 975.ADSGoogle Scholar
  49. Mac Low, M.: 1999, Api 524, 169.ADSGoogle Scholar
  50. Mac Low, M.-M. and Klessen, R.S.: 2003, Rev. Mod. Phys. (astro-ph/0301093).Google Scholar
  51. Mac Low, M., Klessen, R.S., Burkert, A. and Smith, M.D.: 1998, Physical Review Letters 80, 27–54.Google Scholar
  52. Molinari, S., Testi, L., Rodriguez, L.F. and Zhang, Q.: 2002, Api 570, 758.ADSGoogle Scholar
  53. Myers, P.C.: 1983, Api 270, 105.ADSGoogle Scholar
  54. Onishi, T., Mizuno, A., Kawamura, A., Ogawa, H. and Fukui, Y.: 1998, Api 502, 296.ADSGoogle Scholar
  55. Ostriker, E.C., Stone, J.M. and Gammie, C.F.: 2001, Api 546, 980.ADSGoogle Scholar
  56. Padoan, P.: 1995, MNRAS 277, 377.ADSGoogle Scholar
  57. Padoan, P., Goodman, A., Draine, B.T., Juvela, M., Nordlund, A. and Rögnvaldsson, Ö. E.: 2001, Api 559, 1005.ADSGoogle Scholar
  58. Padoan, P. and Nordlund, A.: 1999, Api 526, 279.ADSGoogle Scholar
  59. Padoan, P. and Nordlund, Ake 2002, Api 576, 870.ADSGoogle Scholar
  60. Padoan, P., Nordlund, A. and Jones, B.J.T.: 1997, MNRAS 288, 145.ADSCrossRefGoogle Scholar
  61. Palla, F. and Stabler, S.W.: 2000, Api 540, 255.ADSGoogle Scholar
  62. Palla, F. and Stabler, S.W.: 2002, Api 581, 1194.ADSGoogle Scholar
  63. Passot, T. and Vazquez-Semadeni, E.: 1998, Phys. Rev. E 58, 4501.ADSCrossRefGoogle Scholar
  64. Passot, T. and Vazquez-Semadeni, E.: 2003, AA 398, 845.ADSCrossRefzbMATHGoogle Scholar
  65. Sasao, T.: 1973, PASJ 25 1.Google Scholar
  66. Scalo, J.: 1990, ASSL Vol. 162: Physical Processes in Fragmentation and Star Formation, 151.Google Scholar
  67. Scalo, J., Vazquez-Semadeni, E., Chappell, D., and Passot, T.: 1998, Api 504, 835.ADSGoogle Scholar
  68. Shirley, Y.L., Evans, N.J., Rawlings, J.M.C., and Gregersen, E.M.: 2000, ApJS 131, 249.ADSCrossRefGoogle Scholar
  69. Shu, F.H., Adams, F.C., and Lizano, S.: 1987, ARAA 25, 23.ADSCrossRefGoogle Scholar
  70. Stone, J.M., Ostriker, E.C., and Gammie, C.F.: 1998, AWL 508, L99.Google Scholar
  71. Taylor, S.D., Morata, O., and Williams, D.A.: 1996, AA 313, 269.ADSGoogle Scholar
  72. Vazquez-Semadeni, E., Ballesteros-Paredes, J. and Rodriguez, L.F.: 1997, Api 474, 292.ADSGoogle Scholar
  73. Vazquez-Semadeni, E.: 1994, Api 423, 681.ADSGoogle Scholar
  74. Vazquez-Semadeni, E. and García, N.: 2001, Api 557, 727.ADSGoogle Scholar
  75. Vazquez-Semadeni, E., Ballesteros-Paredes, J. and Klessen, R.S.: 2003, Api 585, L131.Google Scholar
  76. Vazquez-Semadeni, E., Shadmehri, M. and Ballesteros-Paredes, J.: 2002. ApJ submitted.Google Scholar
  77. Wada, K. and Norman, C.A.: 2001, Api 547, 172.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • Javier Ballesteros-Paredes
    • 1
  1. 1.Instituto de AstronomíaUNAMMoreliaMexico

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