Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-23T20:51:02.178Z Has data issue: false hasContentIssue false
  • English
  • Français

The Bias of Molecular Clump Identification Programs: the Example of the Carina Molecular Clouds

Published online by Cambridge University Press:  05 March 2013

N. Schneider  and
K. Brooks
N. Schneider*
Affiliation:
OASU/L3AB, 33270 Floirac, France
K. Brooks*
Affiliation:
European Southern Observatory, Casilla 19001 Santiago, Chile Departamento de Astronomia, Universidad de Chile, Santiago, Chile
*
DE-mail: [email protected]
EE-mail: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A large scale 12CO J = 1 → 0 molecular line map of the Carina molecular cloud complex was obtained with the Mopra radio telescope in order to investigate its spatial and kinematic structure. The data show a complex velocity structure in two distinct cloud regions — the Northern and Southern Carina clouds. Two different clump identification methods (GAUSSCLUMPS and CLUMPFIND) were applied to the data. Though both algorithms find a similar clump mass spectral index (1.95 and 1.8, respectively), the properties of the clumps (mass, size, virial equilibrium) differ significantly. We discuss possible explanations for this discrepancy and question the validity of the Larson relations which could be an artifact of the limited spatial resolution and dynamic range of the observations.

Keywords

ISM: moleculesISM: individual Carinamethods: data analysis
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Issue 3 , 2004 , pp. 290 - 301
Copyright
Copyright © Astronomical Society of Australia 2004

References

Ballesteros-Paredes, J., Vazquez-Semadeni, E., & Scalo, J. 1999, ApJ, 512, 286 Google Scholar
Ballesteros-Paredes, J., & Mac Low, M. 2002, ApJ, 570, 734 CrossRefGoogle Scholar
Bally, J., Langer, W., Stark, A., et al. 1987, ApJ, 312, L45 Google Scholar
Bertoldi, F., & McKee, C. 1992, ApJ, 395, 140 Google Scholar
Blitz, L., & Williams, J. P. 1997, ApJ, 488, L145 Google Scholar
Brand, J., & Wouterloot, J. G. A. 1995, A&A, 303, 851 Google Scholar
Brand, J., Wouterloot, J. G. A., Rudolph, A. L., & de Geus, E. J. 2001, A&A, 377, 644 Google Scholar
Brooks, K. J., Whiteoak, J. B., & Storey, J. W. V. 1998, PASA, 15, 202 CrossRefGoogle Scholar
Brooks, K. J., Burton, M. G., Rathborne, J. M., et al. 2000, MNRAS, 319, 95 CrossRefGoogle Scholar
Brooks, K. J., Cox, P., Schneider, N., et al. 2003, A&A, 412, 751 Google Scholar
Carpenter, J. M., & Sanders, D. B. 1998, AJ, 116, 1856 Google Scholar
Carr, J. S. 1987, ApJ, 323, 170 Google Scholar
Chiéze, J.-P., & Pineau Des Forets, G. 1987, A&A, 183, 98 Google Scholar
Combes, F. 1991, ARA&A, 29, 195 Google Scholar
Cox, P., & Bronfman, L. 1995, A&A, 299, 583 Google Scholar
Dame, T. M., Koper, E., Israel, F. P., & Thaddeus, P. 1993, ApJ, 418, 730 CrossRefGoogle Scholar
Elmegreen, B. G. 2000, ApJ, 539, 342 Google Scholar
Elmegreen, B. G., & Falgarone, E. 1996, ApJ, 471, 816 CrossRefGoogle Scholar
Feinstein, A. 1995, RevMexAA (Serie de Conferencias), 2, 57 Google Scholar
Falgarone, E., & Puget, J. L. 1986, A&A, 162, 235 Google Scholar
Fukui, Y., Onishi, T., Abe, R., et al. 1999, PASJ, 51, 751 Google Scholar
Genzel, R. 1999, Saas-Fee Course 21, ed. D. Pfenniger (Berlin: Springer)Google Scholar
de Graauw, T., Lidholm, S., & Fitton, B. 1981, A&A, 102, 257 Google Scholar
Grabelsky, D. A., Cohen, R. S., Bronfman, L., & Thaddeus, P. 1988, ApJ, 331, 181 Google Scholar
Heithausen, A., Bensch, F., Stutzki, J., et al. 1998, A&A, 331, L65 Google Scholar
Heyer, M. H., & Tereby, S. 1998, ApJ, 502, 265 CrossRefGoogle Scholar
Heyer, M. H., Carpenter, J. M., & Snell, R. L. 2001, ApJ, 551, 852 CrossRefGoogle Scholar
Kaufman, M. J., Wolfire, M. G., Hollenbach, D. J., & Luhman, M. L. 1999, ApJ, 527, 795 Google Scholar
Kegel, W. H. 1989, A&A, 225, 517 Google Scholar
Klessen, R., Burkert, A., & Bate, M. R. 1998, ApJ, 501, L205 CrossRefGoogle Scholar
Klessen, R., & Burkert, A. 2001, ApJ, 549, 386 CrossRefGoogle Scholar
Kramer, C., Stutzki, J., & Winnewisser, G. 1996, A&A, 307, 915 Google Scholar
Kramer, C., Stutzki, J., Röhrig, R., et al. 1998, A&A, 329, 249 Google Scholar
Lada, E. A., Bally, J., & Stark, A. A. 1991, ApJ, 368, 432 CrossRefGoogle Scholar
Larson, R. B. 1981, MNRAS, 194, 809 CrossRefGoogle Scholar
Loren, R. B. 1989, ApJ, 338, 902 Google Scholar
Mac Laren, I., Richardson, K. M., & Wolfendale, A. W. 1988, ApJ, 333, 821 CrossRefGoogle Scholar
Mac Low, M., & Klessen, R. S. 2004, RvMP, in pressGoogle Scholar
Maddalena, J., Moscowitz, J., Thaddeus, P., & Morris, M. 1986, ApJ, 303, 375 Google Scholar
Mc Kee, C. F., & Tan, J. C. 2003, ApJ, 585, 850 Google Scholar
Megeath, S. T., Cox, P., Bronfman, L., & Roelfsema, P. R. 1996, A&A, 305, 296 Google Scholar
Motte, F., André, P., & Neri, R. 1998, A&A, 336, 150 Google Scholar
Myers, P. 1983, ApJ, 270, 105 Google Scholar
Nagahama, T., Mizuno, A., Ogawa, H., et al. 1998, AJ, 116, 336 CrossRefGoogle Scholar
Price, S. D. 1995, SSRv, 74, 81 Google Scholar
Rathborne, J. M., Burton, M. G., Brooks, K. J., et al. 2002, MNRAS, 331, 85 CrossRefGoogle Scholar
Rees, M. J. 1986, MNRAS, 218, 25 CrossRefGoogle Scholar
Saito, H., Tachihara, K., Onishi, T., et al. 1999, PASJ, 51, 819 Google Scholar
Saito, H., Mizuno, N., & Morigichi, Y. 2001, PASJ, 53, 1037 Google Scholar
Salpeter, E. E. 1955, ApJ, 121, 161 Google Scholar
Scalo, J. 1990, Physical Processes in Fragmentation and Star Formation, pp. 151–176 (Dordrecht: Kluwer)Google Scholar
Schneider, N., Stutzki, J., Winnewisser, G., et al. 1998, A&A, 335, 1049 Google Scholar
Simon, R., Jackson, J. M., Clemens, D. P., et al. 2001, ApJ, 551, 747 Google Scholar
Smith, N., Egan, M. P., Carey, S., et al. 2000, ApJ, 532, L145 Google Scholar
Solomon, P. M., Rivolo, A. R., Barret, J., et al. 1987, ApJ, 319, 730 Google Scholar
Strong, J., Bloemen, J., Dame, T., et al. 1988, A&A, 207, 1 Google Scholar
Stutzki, J. 1993, Reviews in Modern Astronomy, 6, pp. 209–232 Google Scholar
Stutzki, J., & Güsten, R. 1990, ApJ, 356, 513 Google Scholar
Tapia, M., Roth, M., Vázquez, R. A., & Feinstein, A. 2003, MNRAS, 339, 44 Google Scholar
Tatematsu, K. 1999, Proc. of Star Formation, 72 Google Scholar
Testi, L., & Sargent, A. 1998, ApJL, 508, 91 Google Scholar
Williams, J. P., de Geus, E. J., & Blitz, L. 1994, ApJ, 428, 693 Google Scholar
Ward-Thomnpson, D. 2002, Science, 295, 76 Google Scholar
Williams, J. P., Blitz, L., & Stark, A. 1995, ApJ, 451, 252 Google Scholar
Williams, J. P., & Blitz, L. 1998, ApJ, 494, 657 Google Scholar
Yamaguchi, N., Mizuno, N., Saito, H., et al. 1999, PASJ, 51, 791 Google Scholar
Yamaguchi, N., Ezawa, H., & Kawabe, R. 2003, IAU, 221, 236 Google Scholar
Zhang, X., Lee, Y., Bolatto, A., & Stark, A. A. 2001, ApJ, 553, 274 Google Scholar
Zimmermann, T., & Ungerechts, H. 1990, A&A, 238, 337 Google Scholar