Jets From Young Stars V pp 201-222

Part of the Lecture Notes in Physics book series (LNP, volume 791) | Cite as

Jets and Outflows from Collapsing Objects

Chapter

Abstract

Jets and outflows are ubiquitously observed around young stellar objects. There is now strong evidence that these jets are launched from the protostellar disc around the young stars through the coupling of magnetic fields. Magnetic fields threading the pre-stellar molecular cores are dragged inwards during the gravitational collapse and are wound up by the rotating gas in the protostellar disc. The resulting geometry of the magnetic field is that of a hourglass. The magnetic flux is strongly compressed inside the central region and flux lines pointing outwards connecting to the outer region. Additionally, the magnetic field lines anchored to the underlying protodisc are wound up and acquire a strong toroidal component. Such a field configuration, together with the underlying rotor, is known to launch and accelerate material off the disc. This could be the onset of the observed jets around young stellar objects.

In this contribution to the Jetset lecture notes we summarise the research progress in the field of jet launching from collapsing objects. Complying with this workshop on high-performance computing in astrophysics this is done while focusing on results from numerical simulations for this task.

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References

  1. 1.
    Allen, A., Li, Z., Shu, F.H., 2003, Collapse of Magnetized Singular Isothermal Toroids. II. Rotation and Magnetic Braking. ApJ 599, 363–379, DOI 10.1086/379243Google Scholar
  2. 2.
    Alves, J.F., Lada, C.J., Lada, E.A., 2001, Internal structure of a cold dark molecular cloud inferred from the extinction of background starlight. Nature 409, 159–161CrossRefADSGoogle Scholar
  3. 3.
    Andre, P., Ward-Thompson, D., Barsony, M., 2000, From Prestellar Cores to Protostars: The Initial Conditions of Star Formation. Protostars and Planets IV pp 59–+ADSGoogle Scholar
  4. 4.
    Arce, H.G., Shepherd, D., Gueth, F., Lee, C.F., Bachiller, R., Rosen, A., Beuther, H., 2007, Molecular Outflows in Low- and High-Mass Star-forming Regions. In: B. Reipurth, D. Jewitt, K. Keil (eds) Protostars and Planets V, pp 245–260 157, 166Google Scholar
  5. 5.
    Bacciotti, F., Ray, T.P., Mundt, R., Eislöffel, J., Solf, J., 2002, Hubble Space Telescope/STIS Spectroscopy of the Optical Outflow from DG Tauri: Indications for Rotation in the Initial Jet Channel. ApJ 576, 222–231CrossRefADSGoogle Scholar
  6. 6.
    Bachiller, R., 1996, Bipolar Molecular Outflows from Young Stars and Protostars. ARA&A 34, 111–154CrossRefADSGoogle Scholar
  7. 7.
    Bally, J., Reipurth, B., Davis, C.J., 2007, Observations of Jets and Outflows from Young Stars. In: B. Reipurth, D. Jewitt, K. Keil (eds) Protostars and Planets V, pp 215–230Google Scholar
  8. 8.
    Banerjee, R., Pudritz, R.E., 2006, Outflows and jets from collapsing magnetized cloud cores. ApJ 641, 949–+CrossRefADSGoogle Scholar
  9. 9.
    Banerjee, R., Pudritz, R.E., 2007, Massive star formation via high accretion rates and early disk-driven outflows. ApJ 660, 479, astro-ph/0612674Google Scholar
  10. 10.
    Banerjee, R., Pudritz, R.E., Holmes, L., 2004, The formation and evolution of protostellar discs; three-dimensional adaptive mesh refinement hydrosimulations of collapsing, rotating Bonnor-Ebert spheres. MNRAS 355, 248–272CrossRefADSGoogle Scholar
  11. 11.
    Bate, M.R., Burkert, A., 1997, Resolution requirements for smoothed particle hydrodynamics calculations with self-gravity. MNRAS 288, 1060–1072ADSGoogle Scholar
  12. 12.
    Beck, R., 2001, Galactic and Extragalactic Magnetic Fields. Space Sci Rev 99, 243–260, arXiv:astro-ph/0012402Google Scholar
  13. 13.
    Berger, M.J., Colella, P., 1989, Local adaptive mesh refinement for shock hydrodynamics. J Comput Phys 82, 64–84MATHCrossRefADSGoogle Scholar
  14. 14.
    Berger, M.J., Oliger, J., 1984, Adaptive mesh refinement for hyperbolic partial differential equations. J Comput Phys 53, 484–+MATHCrossRefMathSciNetADSGoogle Scholar
  15. 15.
    Beuther, H., Shepherd, D., 2005, Precursors of UCHII Regions and the Evolution of Massive Outflows. In: M.S.N. Kumar, M. Tafalla, P. Caselli (eds) Cores to Clusters: Star Formation with Next Generation Telescopes, pp 105–119Google Scholar
  16. 16.
    Blandford, R.D., Payne, D.G., 1982, Hydromagnetic flows from accretion discs and the production of radio jets. MNRAS 199, 883–903MATHADSGoogle Scholar
  17. 17.
    Bonnor, W.B., 1956, Boyle’s Law and gravitational instability. MNRAS 116, 351–+MathSciNetADSGoogle Scholar
  18. 18.
    Børve, S., Omang, M., Trulsen, J., 2006, Multidimensional MHD Shock Tests of Regularized Smoothed Particle Hydrodynamics. ApJ 652, 1306–1317, DOI 10.1086/508454Google Scholar
  19. 19.
    Boss, A.P., 2002, Collapse and Fragmentation of Molecular Cloud Cores. VII. Magnetic Fields and Multiple Protostar Formation. ApJ 568, 743–753, DOI 10.1086/339040Google Scholar
  20. 20.
    Braithwaite, J., Spruit, H.C., 2004, A fossil origin for the magnetic field in A stars and white dwarfs. Nature 431, 819–821, DOI 10.1038/nature02934Google Scholar
  21. 21.
    Brandenburg, A., Nordlund, A., Stein, R.F., Torkelsson, U., 1995, Dynamogenerated Turbulence and Large-Scale Magnetic Fields in a Keplerian Shear Flow. ApJ 446, 741–+, DOI 10.1086/175831Google Scholar
  22. 22.
    Cabrit, S., Raga, A., Gueth, F., 1997, Models of Bipolar Molecular Outflows. In: B. Reipurth, C. Bertout (eds) Herbig-Haro Flows and the Birth of Stars, IAU Symposium, vol 182, pp 163–180Google Scholar
  23. 23.
    Collins, D.C., Norman, M.L., 2004, Devolopment of an AMR MHD module for the code Enzo. In: Bulletin of the American Astronomical Society, Bullet Am Astron Soc 36, 1605–+Google Scholar
  24. 24.
    Contopoulos, J., 1995, A simple type of magnetically driven jets: An astrophysical plasma gun. ApJ 450, 616–+, DOI 10.1086/176170Google Scholar
  25. 25.
    Contopoulos, J., 1996, General Axisymmetric Magnetohydrodynamic Flows: Theory and solutions. ApJ 460, 185–+, DOI 10.1086/176960Google Scholar
  26. 26.
    Crutcher, R.M., Troland, T.H., Lazareff, B., Paubert, G., Kazès, I., 1999, Detection of the CN Zeeman Effect in Molecular Clouds. ApJ 514, L121–L124 158,CrossRefADSGoogle Scholar
  27. 27.
    Desch, S.J., Mouschovias, T.C., 2001, The magnetic decoupling stage of star formation. ApJ 550, 314–333CrossRefADSGoogle Scholar
  28. 28.
    Donati, J.F., Paletou, F., Bouvier, J., Ferreira, J., 2005, Direct detection of a magnetic field in the innermost regions of an accretion disk. Nature 438, 466–469 169,CrossRefADSGoogle Scholar
  29. 29.
    Duffin, D.F., Pudritz, R.E., 2008, Simulating hydromagnetic processes in star formation: introducing ambipolar diffusion into an adaptive mesh refinement code. MNRAS in press arXiv:0810.0299Google Scholar
  30. 30.
    Ebert, R., 1955, Über die Verdichtung von H I-Gebieten. Mit 5 Textabbildungen. Zap 37, 217–+MATHADSGoogle Scholar
  31. 31.
    Fendt, C., Camenzind, M., 1996, Magnetohydrodynamic Structure of Protostellar Jets. Astrophys Lett Commun 34, 289–+ADSGoogle Scholar
  32. 32.
    Ferreira, J., 1997, Magnetically-driven jets from Keplerian accretion discs. A&A 319, 340–359ADSGoogle Scholar
  33. 33.
    Foster, P.N., Chevalier, R.A., 1993, Gravitational collapse of an isothermal sphere. ApJ 416, 303–+CrossRefADSGoogle Scholar
  34. 34.
    Fromang, S., Hennebelle, P., Teyssier, R., 2005, RAMSES-MHD: an AMR Godunov code for astrophysical applications. In: F. Casoli, T. Contini, J.M. Hameury, L. Pagani (eds) SF2A-2005: Semaine de l’Astrophysique Francaise, pp 743–+Google Scholar
  35. 35.
    Fryxell, B., Olson, K., Ricker, P., Timmes, F.X., Zingale, M., Lamb, D.Q., MacNeice, P., Rosner, R., Truran, J.W., Tufo, H., 2000, FLASH: An adaptive mesh hydrodynamics code for modeling astrophysical thermonuclear flashes. ApJS 131, 273–334CrossRefADSGoogle Scholar
  36. 36.
    Hennebelle, P., Fromang, S., 2008, Magnetic processes in a collapsing dense core. I. Accretion and ejection. A&A 477, 9–24, DOI 10.1051/0004-6361:20078309, arXiv:0709.2886Google Scholar
  37. 37.
    Hosking, J.G., Whitworth, A.P., 2004, Fragmentation of magnetized cloud cores. MNRAS 347, 1001–1010, DOI 10.1111/j.1365-2966.2004.07274.xGoogle Scholar
  38. 38.
    Hosking, J.G., Whitworth, A.P., 2004, Modelling ambipolar diffusion with two-fluid smoothed particle hydrodynamics. MNRAS 347, 994–1000, DOI 10.1111/j.1365-2966.2004.07273.xGoogle Scholar
  39. 39.
    Johns-Krull, C.M., Valenti, J.A., Koresko, C., 1999, Measuring the magnetic field on the classical T Tauri Star BP Tauri. ApJ 516, 900–915CrossRefADSGoogle Scholar
  40. 40.
    Kato, Y., Mineshige, S., Shibata, K., 2004, Magnetohydrodynamic accretion flows: Formation of magnetic tower jet and subsequent quasi-steady state. ApJ 605, 307–320CrossRefADSGoogle Scholar
  41. 41.
    Königl, A., Pudritz, R.E., 2000, Disk winds and the accretion-outflow connection. Protostars and Planets IV pp 759–+ADSGoogle Scholar
  42. 42.
    Lada, C.J., Alves, J.F., Lombardi, M., 2007, Near-Infrared Extinction and Molecular Cloud Structure. In: B. Reipurth, D. Jewitt, K. Keil (eds) Protostars and Planets V, pp 3–15Google Scholar
  43. 43.
    Larson, R.B., 1969, Numerical calculations of the dynamics of collapsing protostar. MNRAS 145, 271–+163ADSGoogle Scholar
  44. 44.
    Levy, E.H., Sonett, C.P., 1978, Meteorite magnetism and early solar system magnetic fields. In: IAU Colloq. 52: Protostars and Planets, pp 516–+Google Scholar
  45. 45.
    Li, P.S., Norman, M.L., Mac Low, M., Heitsch, F., 2004, The formation of self-gravitating cores in turbulent magnetized clouds. ApJ 605, 800–818CrossRefADSGoogle Scholar
  46. 46.
    Lubow, S.H., Papaloizou, J.C.B., Pringle, J.E., 1994, Magnetic field dragging in accretion discs. MNRAS 267, 235–240ADSGoogle Scholar
  47. 47.
    Lynden-Bell, D., 2003, On why discs generate magnetic towers and collimate jets. MNRAS 341, 1360–1372CrossRefADSGoogle Scholar
  48. 48.
    Machida, M.N., Tomisaka, K., Matsumoto, T., 2004, First MHD simulation of collapse and fragmentation of magnetized molecular cloud cores. MNRAS 348, L1–L5CrossRefADSGoogle Scholar
  49. 49.
    Machida, M.N., Matsumoto, T., Hanawa, T., Tomisaka, K., 2005, Collapse and fragmentation of rotating magnetized clouds - II. Binary formation and fragmentation of first cores. MNRAS 362, 382–402, DOI 10.1111/j.1365-2966.2005.09327.x, arXiv:astro-ph/0506440Google Scholar
  50. 50.
    Machida, M.N., Matsumoto, T., Tomisaka, K., Hanawa, T., 2005, Collapse and fragmentation of rotating magnetized clouds – I. Magnetic flux-spin relation. MNRAS 362, 369–381, DOI 10.1111/j.1365-2966.2005.09297.x, arXiv:astroph/0506439Google Scholar
  51. 51.
    Machida, M.N., Inutsuka, Si., Matsumoto, T., 2006, Outflows driven by giant protoplanets. ApJ 649, L129–L132, DOI 10.1086/508256, arXiv:astroph/0604594Google Scholar
  52. 52.
    Machida, M.N., Matsumoto, T., Hanawa, T., Tomisaka, K., 2006, Evolution of Rotating Molecular Cloud Core with Oblique Magnetic Field. ApJ 645, 1227–1245, DOI 10.1086/504423, arXiv:astro-ph/0602034Google Scholar
  53. 53.
    Machida, M.N., Inutsuka, Si., Matsumoto, T., 2007, Magnetic Fields and Rotations of Protostars. ApJ 670, 1198–1213, DOI 10.1086/521779, arXiv:astroph/0702183Google Scholar
  54. 54.
    MachidaMN, Inutsuka, Si., Matsumoto, T., 2008, High- and Low-VelocityMagnetized Outflows in the Star Formation Process in a Gravitationally Collapsing Cloud. ApJ 676, 1088–1108, DOI 10.1086/528364Google Scholar
  55. 55.
    Matsumoto, T., Tomisaka, K., 2004, Directions of outflows, disks, magnetic fields, and rotation of ysos in collapsing molecular cloud cores. ApJ 616, 266–282, astro-ph/0408086Google Scholar
  56. 56.
    Meglicki, Z., 1994, Verification and accuracy of smoothed particle magnetohydrodynamics. Comput Phys Commun 81, 91–104, DOI 10.1016/0010-4655(94)90113-9Google Scholar
  57. 57.
    Mignone, A., Bodo, G., Massaglia, S., Matsakos, T., Tesileanu, O., Zanni, C., Ferrari, A., 2007, PLUTO: A Numerical Code for Computational Astrophysics. ApJS 170, 228–242, DOI 10.1086/513316, arXiv:astro-ph/0701854Google Scholar
  58. 58.
    Mouschovias, T.C., Paleologou, E.V., 1979, The angular momentum problem and magnetic braking - an exact time-dependent solution. ApJ 230, 204–222CrossRefADSGoogle Scholar
  59. 59.
    Mouschovias, T.C., Paleologou, E.V., 1980, Magnetic braking of an aligned rotator during star formation – an exact, time-dependent solution. ApJ 237, 877–899CrossRefADSGoogle Scholar
  60. 60.
    O’Shea, B.W., Bryan, G., Bordner, J., Norman, M.L., Abel, T., Harkness, R., Kritsuk, A., 2004, Introducing Enzo, an AMR Cosmology Application. ArXiv Astrophysics e-prints astro-ph/0403044Google Scholar
  61. 61.
    Ouyed, R., Pudritz, R.E., 1997, Numerical Simulations of Astrophysical Jets from Keplerian Disks. I. Stationary Models. ApJ 482, 712–+, DOI 10.1086/304170Google Scholar
  62. 62.
    Price, D.J., Monaghan, J.J., 2004, Smoothed Particle Magnetohydrodynamics – I. Algorithm and tests in one dimension. MNRAS 348, 123–138, DOI 10.1111/j.1365-2966.2004.07345.x, arXiv:astro-ph/0310789Google Scholar
  63. 63.
    Price, D.J., Monaghan, J.J., 2004, Smoothed ParticleMagnetohydrodynamics – II. Variational principles and variable smoothing-length terms.MNRAS 348, 139–152, DOI 10.1111/j.1365-2966.2004.07346.x, arXiv:astro-ph/0310790Google Scholar
  64. 64.
    Price, D.J., Monaghan, J.J., 2005, Smoothed Particle Magnetohydrodynamics – III. Multidimensional tests and the ▽.B= 0 constraint. MNRAS 364, 384–406, DOI 10.1111/j.1365-2966.2005.09576.x, arXiv:astro-ph/0509083Google Scholar
  65. 65.
    Pudritz, R.E., 1981, Dynamo action in turbulent accretion discs around black holes – part two – the mean magnetic field. MNRAS 195, 897MATHADSGoogle Scholar
  66. 66.
    Pudritz, R.E., 1981, Dynamo action in turbulent accretion discs around black holes. I – The fluctuations. II – The mean magnetic field. MNRAS 195, 881MATHADSGoogle Scholar
  67. 67.
    Pudritz, R.E., 2003, Accretion-Ejection Models of Astrophysical Jets. NATO ASI, Les Houches, Session LXXVIII, Accretion Discs, Jets and High Energy Phenomena in Astrophysicspp p. 187–230Google Scholar
  68. 68.
    Pudritz, R.E., Norman, C.A., 1983, Centrifugally driven winds from contracting molecular disks. ApJ 274, 677–697CrossRefADSGoogle Scholar
  69. 69.
    Pudritz, R.E., Ouyed, R., Fendt, C., Brandenburg, A., 2007, Disk Winds, Jets, and Outflows: Theoretical and Computational Foundations. In: B. Reipurth, D. Jewitt, K. Keil (eds) Protostars and Planets V, pp 277–294Google Scholar
  70. 70.
    Pudritz, R.E., Banerjee, R., Ouyed, R., 2008, The role of jets in the formation of planets, stars, and galaxies. In: Charbrier, G. (ed) Structure formation in the UniverseGoogle Scholar
  71. 71.
    Reipurth, B., Bally, J., 2001, Herbig-Haro Flows: Probes of Early Stellar Evolution. ARA&A 39, 403–455, DOI 10.1146/annurev.astro.39.1.403Google Scholar
  72. 72.
    Ruffert, M., 1992, Collisions between a white dwarf and a main-sequence star. II – Simulations using multiple-nested refined grids. A&A 265, 82–105ADSGoogle Scholar
  73. 73.
    Shepherd, D.S., Churchwell, E., 1996, Bipolar molecular outflows in massive star formation regions. ApJ 472, 225–+, DOI 10.1086/178057Google Scholar
  74. 74.
    Shepherd, D.S., Churchwell, E., 1996, High-velocity molecular gas from high-mass star formation regions. ApJ 457, 267–+, DOI 10.1086/176727Google Scholar
  75. 75.
    Shibata, K., Uchida, Y., 1985, A magnetodynamic mechanism for the formation of astrophysical jets. I – Dynamical effects of the relaxation of nonlinear magnetic twists. PASJ37, 31–46ADSGoogle Scholar
  76. 76.
    Stepinski, T.F., Levy, E.H., 1988, Generation of dynamo magnetic fields in protoplanetary and other astrophysical accretion disks. ApJ 331, 416–434, DOI 10.1086/166569Google Scholar
  77. 77.
    Stone, J.M., Gardiner, T.A., Teuben, P., Hawley, J.F., Simon, J.B., 2008, Athena: A new code for astrophysical MHD. ArXiv e-prints 804, 0804.0402Google Scholar
  78. 78.
    Tomisaka, K., 1998, Collapse-driven outflow in star-forming molecular cores. ApJ 502, L163+CrossRefADSGoogle Scholar
  79. 79.
    Tomisaka, K., 2002, Collapse of rotating magnetized molecular cloud cores and mass outflows. ApJ 575, 306–326CrossRefADSGoogle Scholar
  80. 80.
    Truelove, J.K., Klein, R.I., McKee, C.F., Holliman, J.H., Howell, L.H., Greenough, J.A., 1997, The jeans condition: A new constraint on spatial resolution in simulations of isothermal self-gravitational hydrodynamics. ApJ 489, L179+CrossRefADSGoogle Scholar
  81. 81.
    Uchida, Y., Shibata, K., 1985, Magnetodynamical acceleration of CO and optical bipolar flows from the region of star formation. PASJ37, 515–535ADSGoogle Scholar
  82. 82.
    von Rekowski, B., Brandenburg, A., Dobler, W., Dobler, W., Shukurov, A., 2003, Structured outflow from a dynamo active accretion disc. A&A 398, 825–844, DOI 10.1051/0004-6361:20021699Google Scholar
  83. 87.
    Wang, P., Abel, T., 2009, Magnetohydrodynamic simulations of disk galaxy formation: the magnetization of the cold and warm medium. ApJ 696, 96–109 203Google Scholar
  84. 83.
    Xu, H., Collins, D.C., NormanML, Li, S., Li, H., 2008, A cosmological AMRMHD module for Enzo. ArXiv e-prints 804, 0804.1334Google Scholar
  85. 84.
    Yorke, H.W., Bodenheimer, P., Laughlin, G., 1993, The formation of protostellar disks. I – 1 M(solar). ApJ 411, 274–284CrossRefADSGoogle Scholar
  86. 85.
    Ziegler, E., Dolag, K., Bartelmann, M., 2006, Divergence cleaning techniques in smoothed particle magnetohydrodynamics simulations. Astronomische Nachrichten 327, 607–+, DOI 10.1002/asna.200610602Google Scholar
  87. 86.
    Ziegler, U., 2005, Self-gravitational adaptive mesh magnetohydrodynamics with the NIRVANA code. A&A 435, 385–395, DOI 10.1051/0004-6361:20042451Google Scholar

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© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Institute for Theoretical Astrophysics at the Zentrum für Astronomie of the University HeidelbergHeidlbergGermany

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