Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-23T10:59:25.790Z Has data issue: false hasContentIssue false

Dense molecular clouds and associated star formation in the Magellanic Clouds

Published online by Cambridge University Press:  01 August 2006

Mónica Rubio*
Affiliation:
Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile email: [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.

Multiwavelengths studies of massive star formation regions in the LMC and SMC reveal that a second generation of stars is being formed in dense molecular clouds located in the surroundings of the massive clusters. These dense molecular clouds have survived the action of massive star UV radiation fields and winds and they appear as compact dense H2 knots in regions of weak CO emission. Alternatively, we have found that large molecular clouds, probably remnants of the parental giant molecular clouds where the first generation of stars were formed, are suffering the interaction of the winds and UV radiation field in their surfaces in the direction of the central massive cluster or massive stars. These molecular regions show 1.2 mm continuum emission form cold dust and they show embedded IR sources as determined from deep ground base JHKs imaging. The distribution of young IR sources as determined from their Mid IR colors obtained by SPITZER concentrate in the maxima of CO and dust emission. IR spectroscopy of the embedded sources with high IR excess confirm their nature as massive young stellar objects (MYSO's). Our results are suggestive of contagious star formation where triggering and induced star formation could be taking place.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

Bik, A., Kaper, L., & Waters, L. B. F. M 2006, A&A 455, 561Google Scholar
Bloemen, J. B. G., M., Strong, A. W., et al. 1986, A&A 154, 25Google Scholar
Bolatto, A., Simon, J., Stanimirovic, S. et al. 2006, ApJ (Submitted)Google Scholar
Bot, C., 2005, PhD thesis, Universite Louis Pasteur, StrasbourgGoogle Scholar
Bot, C., Boulanger, F., Rubio, M., & Rantakyrö, F. 2006, ApJ (Submitted)Google Scholar
Boulanger, F., & Rubio, M. 2006, in: Infante Rubio, L. M., & Torres-Peimbert, S. (eds.), Keys to Spitzer Observations of Luminous Star Forming Regions, RevMexAC (Instituto de Astronomia: UNAM), vol. 26, p. 5Google Scholar
Contursi, A., Lequeux, J., Cesarsky, D., et al. 2000, A&A 362, 310Google Scholar
Elmegreen, B. G., Kimura, T., & Tosa, M. 1995, ApJ 451, 675CrossRefGoogle Scholar
Fukui, Y., Mizuno, N., Yamaguchi, R., et al. 1999, PASJ 51, 745CrossRefGoogle Scholar
Galliano, F., Madden, S. C., Jones, A. P., et al. 2003, A&A 407, 159Google Scholar
Lequeux, J., Le Bourlot, J., Des Forets, G., et al. 1994, A&A 292, 371Google Scholar
Leroy, A., Bolatto, A., Stanimirovic, S. et al. 2006, In preparationGoogle Scholar
Mizuno, N., Rubio, M., Mizuno, A. et al. 2001, PASJ 53, 971CrossRefGoogle Scholar
Nota, A., Sirianni, M., Sabbi, E., et al. , 2006, ApJ 640, L29CrossRefGoogle Scholar
Perez, L. 2005, MSc thesis, Universidad de Chile, Santiago, ChileGoogle Scholar
Poglitsch, A., Krabbe, A., Madden, S. C., et al. 2006, ApJ 454, 293CrossRefGoogle Scholar
Reynolds, R. J. 1992, ApJ 392, L35CrossRefGoogle Scholar
Rubio, M., Lequeux, J., Boulanger, F. et al. , 1993a, A&A 271, 1Google Scholar
Rubio, M., Barbá, R. H., Walborn, N., et al. 1998, A&A 271, 1Google Scholar
Rubio, M., Contursi, A., Lequeux, J., et al. 2000, A&A 359, 1139Google Scholar
Rubio, M., Boulanger, F., Rantakyrö, F., & Contursi, A. 2004, A&A 425, L1Google Scholar
Rubio, M., & Barbá, R. H. 2006, ApJL (Submitted)Google Scholar
Simon, J., Bolatto, A., Whitney, B. et al. , 2006, in preparationGoogle Scholar
Walborn, N. R., Barbá, R.H., Brandner, W. et al. 1999, AJ 117, 225CrossRefGoogle Scholar