DOI QR코드

DOI QR Code

ATOMIC CARBON IN THE W 3 GIANT MOLECULAR CLOUD

  • SAKAI TAKESHI (Nobeyama Radio Observatory) ;
  • OKA TOMOHARU (Department of Physics, The University of Tokyo) ;
  • YAMAMOTO SATOSHI (Department of Physics, The University of Tokyo)
  • Published : 2005.06.01

Abstract

We have mapped the W 3 giant molecular cloud in the $C^o\;^3P_1-^3 P_o$ ([CI]) line with the Mount Fuji Submillimeter-wave Telescope. The [CI] emission is extended over the molecular cloud, having peaks at three star forming clouds; W 3(Main), W 3(OH), and AFGL 333. The [CI] emission is found to be strong in the AFGL 333 cloud. We have also observed the $C^{18}O,\;CCS,\;N_2H^+$, and $H^{13}CO^+$ lines by using the Nobeyama Radio Observatory 45 m telescope. In the AFGL 333 cloud, we find two massive cores, which are highly gravitationally bound and have no sign of active star formation. The high [$C^o$]/[CO] and [CCS]/[$N_2H^+$] abundance ratios suggest that the AFGL 333 cloud is younger than the W 3(Main) and W 3(OH) clouds.

Keywords

ISM: individual: W 3;ISM: clouds;ISM: atoms;submillimeter [CI] lines

References

  1. Carpenter, John M., Heyer, Mark H., Snell, & Ronald L., 2000, ApJS, 130, 381 https://doi.org/10.1086/317352
  2. Frerking, M. A., Langer, W. D., & Wilson, R. W., 1982, ApJ, 262, 590 https://doi.org/10.1086/160451
  3. Heyer, M. H., Brunt, C., Snell, R. L., Howe, J. E., Schloerb, F. P., & Carpenter, J. M., 1998, ApJS, 115, 241 https://doi.org/10.1086/313086
  4. Hughes, V. A., & Viner, M. R. J., 1982, AJ, 87, 685 https://doi.org/10.1086/113145
  5. Kramer, C., Jakob, H., Mookerjea, B., Schneider, N., Brull, M., & Stutzki, J., 2004, A&A, 424, 887 https://doi.org/10.1051/0004-6361:20047085
  6. Kuboi, N., et al., 2005, ApJ, submitted
  7. Lada, C. J., Elmegreen, B. G., Cong, H.-I., & Thaddeus, P., 1978, ApJL, 226, L39 https://doi.org/10.1086/182826
  8. Lee, H.-H., Herbst, E., Pineau des Forets, G., Roueff, E., & Le Bourlot, J., 1996, A&A, 311, 690
  9. Massey, P., Johnson, K. E., & Degioia-Eastwood, K., 1995, ApJ, 454, 151 https://doi.org/10.1086/176474
  10. Nejad, L. A. M., & Wagenblast, R., 1999, A&A, 350, 204
  11. Oka, T., Iwata, M., Maezawa, H., Ikeda, M., Ito, T., Kamegai, K., Sakai, T., & Yamamoto, S., 2004, ApJ, 602, 803 https://doi.org/10.1086/381082
  12. Plume, R., Jaffe, D. T., Evans, Neal J., II; Martin-Pintado, J., & Gomez-Gonzalez, J., 1997, ApJ, 476, 730 https://doi.org/10.1086/303654
  13. Plume, R., Jaffe, D. T., Tatematsu, K., Evans II, N. J., & Keene, J., 1999, ApJ, 512, 768 https://doi.org/10.1086/306780
  14. Sakai T., Yamamoto, S., et al., 2005, in this issue
  15. Suzuki, H., Yamamoto, S., Ohishi, M., Kaifu, N., Ishikawa, S., Hirahara, Y., & Takano, S., 1992, ApJ, 392, 551 https://doi.org/10.1086/171456
  16. Thronson, H. A., Jr., Campbell, M. F., & Hoffmann, W. F. I., 1980, ApJL, 229, L133 https://doi.org/10.1086/182946
  17. Tieftrunk, A. R., Gaume, R. A., Claussen, M. J., Wilson, T. L., & Johnston, K. J., 1997, A&A, 239, 533
  18. Tieftrunk, A. R., Megeath, S. T., Wilson, T. L., & Rayner, J. T., 1998, A&A, 336, 991
  19. Tielens, A. G. G. M., & Hollenbach, D., 1985, ApJ, 291, 722 https://doi.org/10.1086/163111
  20. Williams, J. P., de Geus, E. J., & Blitz, L., 1994, ApJ, 428, 693 https://doi.org/10.1086/174279
  21. Wilson, T.L., Gaume, R.A., & Johnston, K.J., 1993, ApJ, 402, 230 https://doi.org/10.1086/172126
  22. Yamamoto, S., & Saito, S., 1991, ApJL, 370, L103 https://doi.org/10.1086/185987

Cited by

  1. The gas properties of the W3 giant molecular cloud: a HARP study vol.422, pp.4, 2012, https://doi.org/10.1111/j.1365-2966.2012.20803.x