Skip to main content Accessibility help
×
Home

Dynamical Influences of the Last Magellanic Interaction on the Magellanic Clouds

  • Kenji Bekki (a1) and Masashi Chiba (a2)

Abstract

We investigate the present distributions of gas and young stars in the Large and Small Magellanic Clouds (LMC and SMC) based on fully self-consistent numerical simulations of the Clouds for the last ∼0.8 Gyr. Our principal results, which can be tested against observations, are as follows. The last dynamical and hydrodynamical interaction between the Clouds about ∼0.2 Gyr ago can form the apparently off-center bar and peculiar Hı spirals of the LMC. The present spatial distributions of young stars with ages less than ∼20 Myr in the LMC can be significantly asymmetric and clumpy owing to the interaction. A small but non-negligible fraction of stellar and gaseous components can be transferred from the SMC into the LMC during the interaction to form diffuse halo components around the LMC. The burst of star formation in the SMC can be synchronized with that of the LMC about 0.2 Gyr ago in some models. New stars can form from gas in the SMC's tidal tails, one of which can be observed as the Magellanic Bridge (MB). The metallicity distribution function of new stars in the MB has a peak of [Fe/H] ∼ −0.8, which is significantly smaller than the stellar metallicity of the SMC. Based on these results, we discuss the origin of 30 Doradus, the southern molecular ridge of the LMC, the globular cluster ESO 121-SC03, metal-poor inter-Cloud stars within the MB, and giant Hı holes of the LMC.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Dynamical Influences of the Last Magellanic Interaction on the Magellanic Clouds
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Dynamical Influences of the Last Magellanic Interaction on the Magellanic Clouds
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Dynamical Influences of the Last Magellanic Interaction on the Magellanic Clouds
      Available formats
      ×

Copyright

Corresponding author

C Corresponding author. Email: bekki@phys.unsw.edu.au

References

Hide All
Bekki, K. & Chiba, M., 2005, MNRAS, 356, 680
Bekki, K. & Chiba, M., 2006, ApJ, 637, L97
Bekki, K., Beasley, M. A., Forbes, D. A. & Couch, W. J., 2004a, ApJ, 602, 730
Bekki, K., Couch, W. J., Beasley, M. A., Forbes, D. A., Chiba, M. & Da Costa, G., 2004b, ApJ, 610, L93
Broeils, A. H. & van Woerden, H., 1994, A&AS, 107, 129
Da Costa, G. S., 1991, in IAU Symp., 148, The Magellanic Clouds, Eds. Haynes, R. & Milne, D. (Dordrecht: Kluwer), 183
de Boer, K. S., Braun, J. M., Vallenari, A. & Mebold, U., 1998, A&A, 329, L49
de Vaucouleurs, G. & Freeman, K. C., 1972, VA, 14, 163
Efremov, Y. N., 2004, ASP Conf. Ser., 316, Order and Chaos in Stellar and Planetary Systems, Eds. Byrd, G., Kholshevnikov, K., Myllri, A., Nikiforov, I. & Orlov, V. (San Francisco: Astronomical Society of the Pacific), 261
Feitzinger, V., Glassgold, A. E., Gerola, H. & Seiden, P. E., 1981, A&A, 98, 371
Freeman, K. C., 1984, in IAU Symp., 108, Structure and Evolution of the Magellanic Clouds, Eds. van den Bergh, S. & Boer, K. S. D. (Dordrecht: Reidel), 107
Fujimoto, M. & Kumai, Y., 1997, AJ, 113, 249
Fukui, Y., et al., 1999, PASJ, 51, 745
Gardiner, L. T. & Noguchi, M., 1996, MNRAS, 278, 191
Gardiner, L. T., Turfus, C. & Putman, M. E., 1998, ApJ, 507, L35
Geisler, D., Bica, E., Dottori, H., Clari, J. J., Piatti, A. E. & Santos, J. F. C. Jr., 1997, AJ, 114, 1920
Girardi, L., Chiosi, C., Bertelli, G. & Bressan, A., 1995, A&A, 298, 877
Harris, J., 2007, ApJ, in press (astro-ph/0612107)
Harris, J. & Zaritsky, D., 2004, AJ, 127, 1531
Irwin, M. J., Demers, S. & Kunkel, W. E., 1990, AJ, 99, 191
Kallivayalil, N., van der Marel, R. P. & Alcock, C., 2006, ApJ, 652, 1213
Kawamura, A., et al., 2007, in preparation
Kennicutt, R. C. Jr., 1998, ARA&A, 36, 189
Kunkel, W. E., Demers, S., Irwin, M. J. & Albert, L., 1997, ApJ, 488, L129
Luks, Th. & Rohlfs, K., 1992, A&A, 263, 41
Mackey, A. D., Payne, M. J. & Gilmore, G. F., 2006, MNRAS, 369, 921
Mateo, M., Hodge, P. & Schommer, R. A., 1986, ApJ, 311, 113
Mizuno, N., Muller, E., Maeda, H., Kawamura, A., Minamidani, T., Onishi, T., Mizuno, A. & Fukui, Y., 2006, ApJ, 643, L107
Murai, T. & Fujimoto, M., 1980, PASJ, 32, 581
Olsen, K. A. G. & Massey, P., 2007, ApJ, 656, L61
Ott, J., et al., 2007, in preparation
Piatti, A. E., Sarajedini, A., Geisler, D., Seguel, J. & Clark, D., 2005, MNRAS, 358, 1215
Rhode, K. L., Salzer, J. J., Westpfahl, D. J. & Radice, L. A., 1999, AJ, 118, 323
Rolleston, W. R. J., Dufton, P. L., McErlean, N. D. & Venn, K. A., 1999, A&A, 348, 728
Selman, F., Melnick, J., Bosch, G. & Terlevich, R., 1999, A&A, 347, 532
Staveley-Smith, L., Kim, S., Calabretta, M. R., Haynes, R. F. & Kesteven, M. J., 2003, MNRAS, 339, 87
Subramaniam, A. & Prabhu, T. P., 2005, ApJ, 625, L47
Susa, H. & Umemura, M., 2004, ApJ, 610, L5
van den Bergh, S., 2000, The Galaxies of the Local Group (Cambridge: Cambridge University Press)
van der Marel, R. P., 2001, AJ, 122, 1827
Vazdekis, A., Casuso, E., Peletier, R. F. & Beckman, J. E., 1996, ApJS, 106, 307
Yoshizawa, A. & Noguchi, M., 2003, MNRAS, 339, 1135
Weinberg, M. D., 2000, ApJ, 532, 922
Westerlund, B. E., 1997, The Magellanic Clouds (Cambridge: Cambridge University Press)
Zaritsky, D. & Harris, J., 2004, ApJ, 604, 167

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed