Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
권호 표지
DOI QR코드

DOI QR Code

WATER MASERS FROM THE PROTOSTELLAR DISK AND OUTFLOW IN THE NGC 1333 IRAS 4 REGION

  • Park, Geum-Sook (International Center for Astrophysics, Korea Astronomy and Space Science Institute) ;
  • Choi, Min-Ho (International Center for Astrophysics, Korea Astronomy and Space Science Institute)
  • Published : 2007.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

NGC 1333 is a nearby star forming region, and IRAS 4A and IRAS 4BI are low-mass Class 0 protostars. IRAS 4A is a protobinary system. The NGC 1333 IRAS 4 region was observed in the 22 GHz water maser with a high resolution (0.08") using the Very Large Array. Two groups of masers were detected: one near A2 and the other near BI. Most of the masers associated with A2 are located very close (< 100 AU) to the radio continuum source. They may be associated with the circumstellar disk. Since no maser was detected near AI, the A2 disk is relatively more active than the Al disk. Most of the masers in the BI region are distributed along a straight line, and they are probably related with the outflow. As in many other water maser sources, the IRAS 4 water masers seem to trace selectively either the disk or the outflow. Considering the outflow lifetimes, the disk-outflow dichotomy is probably unrelated with the evolutionary stage of protostars. A possible explanation may be that both the outflow-maser and the disk-maser are rare phenomena and that detecting both kinds of maser around a single protostar may be even rarer.

Keywords

References

  1. Blake, G. A., Sandell, G., van Dishoeck, E. F., Groesbeck, T. D., Mundy, L. G., & Aspin, C. 1995, A molecular line study of NGC 1333/IRAS 4, ApJ, 441, 689 https://doi.org/10.1086/175392
  2. Choi, M. 2001, High-Resolution Observations of the Molecular Clouds in the NGC 1333 IRAS 4 Region, ApJ, 553, 219
  3. Choi, M. 2005, Variability of the NGC 1333 IRAS 4A Outflow: Silicon Monoxide Observations, ApJ, 630, 976 https://doi.org/10.1086/432113
  4. Choi, M., Hodapp, K. W., Hayashi, M., Motohara, K., Pak, S., & Pyo, T. 2006, Variability of the NGC 1333 IRAS 4A Outflow: Molecular Hydrogen and Silicon Monoxide Images, ApJ, 646, 1050 https://doi.org/10.1086/505037
  5. Choi, M, Tatematsu, K., Park, G., & Kang, M. 2007, Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System, ApJ, 667, L183 https://doi.org/10.1086/522116
  6. de Zeeuw, P. T., Hoogerwerf, R., de Bruijne, J. H. J., Brown, A. G. A., & Blaauw, A. 1999, A HIPPARCOS Census of the Nearby OB Associations, AJ, 117, 354 https://doi.org/10.1086/300682
  7. Furuya, R. S., Kitamura, Y., Wootten, A., Claussen, M. J., & Kawabe, R. 2003, Water Maser Survey toward LowMass Young Stellar Objects in the Northern Sky with the Nobeyama 45 Meter Telescope and the Very Large Array, ApJS, 144, 71 https://doi.org/10.1086/342749
  8. Girart, J. M., Roo, R., & Marrone, D. P. 2006, Magnetic Fields in the Formation of Sun-Like Stars, Science, 313, 812 https://doi.org/10.1126/science.1129093
  9. Haschick, A. D., Moran, J. M., Rodriguez, L. F., Burke, B. F., Greenfield, P., & Garcia-Barreto, J. A. 1980, Observations of a compact H II region and water vapor maser sources in the vicinity of the Herbig-Haro objects 7-11, ApJ, 237, 26 https://doi.org/10.1086/183222
  10. Jennings, R. E., Cameron, D. H. M., Cudlip, W., & Hirst, C. J. 1987, IRAS observations of NGC1333, MNRAS, 226, 461 https://doi.org/10.1093/mnras/226.2.461
  11. Lay, O. P., Carlstrom, J. E., & Hills, R. E. 1995, NGC 1333 IRAS 4: Further Multiplicity Revealed with the CSOJCMT Interferometer, ApJ, 452, 73
  12. Looney, L. W., Mundy L. G., & Welch, W. J. 2000, Unveiling the Circumstellar Envelope and Disk: A Subarcsecond Survey of Circumstellar Structures, ApJ, 529, 477 https://doi.org/10.1086/308239
  13. Park, G., & Choi, M. 2007, Observations of Water Masers in the NGC 1333 IRAS 4 Region, ApJ, 664, L99 https://doi.org/10.1086/520810
  14. Reipurth, B., Rodriguez, L. F., Anglada, G., & Bally, J. 2002, Radio Continuum Maps of Deeply Embedded Protostars: Thermal Jets, Multiplicity, and Variability, ApJ, 124, 1045
  15. Rodriguez, L. F., Anglada, G., & Curiel, S. 1999, The Nature of the Radio Continuum Sources Embedded in the HH 7-11 Region and Its Surroundings, ApJS, 125, 427
  16. Rodriguez, L. F., Anglada, G., Torrelles, J. M., MendozaTorres, J. E., Haschick A. D., & Ho, P. T. P. 2002, VLA observations of water maser emission associated with SVS 13 and other sources in NGC 1333, A&A, 389, 572 https://doi.org/10.1051/0004-6361:20020619
  17. Sandell, G., Aspin, C., Duncan, W. D., Russell, A. P. G., & Robson, E. I. 1991, NGC 1333 IRAS 4 - A very young, low-luminosity binary system, ApJ, 376, 17
  18. Torrelles, J. M., Gomez, J. F., Rodriguez, L. F., Ho, P. T. P., Curiel, S., & Vazquez, R. 1997, Radio Continuum-$H_2O$ Maser Systems in NGC 2071: $H_2O$ Masers Tracing a Jet (IRS 1) and a Rotating Proto-planetary Disk of Radius 20 AU (IRS 3), ApJ, 489, 744
  19. Torrelles, J. M., Gomez, J. F., Rodriguez, L. F., Curiel, S., Anglada, G., & Ho, P. T. P. 1998, A Radio Jet-$H_2O$ Maser System in W75N(B) at a 200 AU Scale: Exploring the Evolutionary Stages of Young Stellar Objects, ApJ, 505, 756