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MOLECULAR OUTFLOWS AND THE FORMATION PROCESS OF VERY LOW-MASS OBJECTS

  • PHAN-BAO, NGOC (Department of Physics, International University-Vietnam National University HCM) ;
  • DANG-DUC, CUONG (Department of Physics, International University-Vietnam National University HCM) ;
  • LEE, CHIN-FEI (Institute of Astronomy and Astrophysics, Academia Sinica) ;
  • HO, PAUL T.P. (Institute of Astronomy and Astrophysics, Academia Sinica)
  • Received : 2014.11.30
  • Accepted : 2015.06.30
  • Published : 2015.09.30

Abstract

We present observational results characterizing molecular outflows from very low-mass objects in ${\rho}$ Ophiuchi and Taurus. Our results provide us with important implications that clarify the formation process of very low-mass objects.

Acknowledgement

Supported by : National Foundation for Science and Technology Development (NAFOS-TED)

References

  1. Andre, P., Ward-Thompson, D., & Greaves, J., 2012, Interferometric Identification of a Pre-Brown Dwarf, Science, 337, 69 https://doi.org/10.1126/science.1222602
  2. Baraffe, I., Chabrier, G., & Gallardo, J., 2009, Episodic Accretion at Early Stages of Evolution of Low-Mass Stars and Brown Dwarfs: A Solution for the Observed Luminosity Spread in H-R Diagrams?, ApJ, 702, L27 https://doi.org/10.1088/0004-637X/702/1/L27
  3. Bonnell, I. A., Clark, P., & Bate, M. R., 2008, Gravitational Fragmentation and the Formation of Brown Dwarfs in Stellar Clusters, MNRAS, 389, 1556 https://doi.org/10.1111/j.1365-2966.2008.13679.x
  4. Bourke, T. L., Crapsi, A., & Myers, P. C., et al., 2005, Discovery of a Low-Mass Bipolar Molecular Outflow from L1014-IRS with the Submillimeter Array, ApJ, 633, L129 https://doi.org/10.1086/498449
  5. Hartigan, P., Edwards, S., & Ghandour, L., 1995, Disk Accretion and Mass Loss from Young Stars, ApJ, 452, 736 https://doi.org/10.1086/176344
  6. Kumar, S. S., 1963, The Structure of Stars of Very Low Mass, ApJ, 137, 1121 https://doi.org/10.1086/147589
  7. Levreault, R. M., 1988a, A search for Molecular Outflows toward the re-main-sequence Objects, ApJS, 67, 283 https://doi.org/10.1086/191275
  8. Levreault, R. M., 1988b, Molecular Outflows and Mass Loss in the pre-main-sequence Stars, ApJ, 330, 897 https://doi.org/10.1086/166520
  9. Luhman, K. L., Joergens, V., Lada, C., Muzerolle, J., Pascucci, I., & White, R., 2007, The Formation of Brown Dwarfs: Observations, in Protostars and Planets V, ed. B. Reipurth, D. Jewitt, & K. Keil (Tucson: Univ. Arizona Press), 443
  10. Muzerolle, J., Hillenbrand, L., Calvet, N., Briceno, C., & Hartmann, L., 2003, Accretion in Young Stellar/Substellar Objects, ApJ, 592, 266 https://doi.org/10.1086/375704
  11. Nakajima, T., Oppenheimer, B. R., Kulkarni, S. R., Golimowski, D. A., Matthews, K., & Durrance, S. T., 1995, Discovery of a Cool Brown Dwarf, Nature, 378, 463 https://doi.org/10.1038/378463a0
  12. Natta, A., Testi, L., Muzerolle, J., Randich, S., Comeron, F., & Persi, P., 2004, Accretion in Brown Dwarfs: An Infrared View, A&A, 424, 603 https://doi.org/10.1051/0004-6361:20040356
  13. Padoan, P., & Nordlund, A. 2004, The "Mysterious" Origin of Brown Dwarfs, ApJ, 617, 559 https://doi.org/10.1086/345413
  14. Palau, A., et al., 2014, IC 348-SMM2E: A Class 0 Proto-Brown Dwarf Candidate Forming as a Scaled-Down Version of Low-Mass Stars, MNRAS, 444, 833 https://doi.org/10.1093/mnras/stu1461
  15. Parker, N. D., Padman, R., & Scott, P. F., 1991, Outflows in Dark Clouds - Their Role in Protostellar Evolution, MNRAS, 252, 442 https://doi.org/10.1093/mnras/252.3.442
  16. Phan-Bao, N., et al., 2008, First Confirmed Detection of a Bipolar Molecular Outflow from a Young Brown Dwarf, ApJ, 689, L141 https://doi.org/10.1086/595961
  17. Phan-Bao, N., Lee, C.-F., Ho, P. T. P., & Tang, Y.-W., 2011, Molecular Outflows in the Substellar Domain: Millimeter Observations of Young Very Low Mass Objects in Taurus and rho Ophiuchi, ApJ, 735, 14 https://doi.org/10.1088/0004-637X/735/1/14
  18. Phan-Bao, N., Lee, C.-F., Ho, P. T. P., Dang-Duc, C., & Li, D., 2014, Characterization of Molecular Outflows in the Substellar Domain, ApJ, 795, 70 https://doi.org/10.1088/0004-637X/795/1/70
  19. Rebolo, R., Zapatero Osorio, M. R., & Martin, E. L., 1995, Discovery of a brown dwarf in the Pleiades star cluster, Nature, 377, 129 https://doi.org/10.1038/377129a0
  20. Whelan, E. T., Ray, T. P., Bacciotti, F., Natta, A., Testi, L., & Randich, S., 2005, A Resolved Outflow of Matter from a Brown Dwarf, Nature, 435, 652 https://doi.org/10.1038/nature03598
  21. White, R. J., & Basri, G., 2003, Very Low Mass Stars and Brown Dwarfs in Taurus-Auriga, ApJ, 582, 1109 https://doi.org/10.1086/344673
  22. Whitworth, A., Bate, M. R., Nordlund, A., Reipurth, B., & Zinnecker, H., 2007, The Formation of Brown Dwarfs:Theory, in Protostars and Planets V, ed. B. Reipurth, D. Jewitt, & K. Keil (Tucson: Univ. Arizona Press), 459