Abstract
We report new echelle observations of the kinematics of 30 HII regions in the LMC, including the 30 Doradus giant HII region. All of the HII regions possess supersonic velocity dispersions, which can be attributed to a combination of turbulent motions and discrete velocity splitting produced by stellar winds and/or embedded supernova remnants (SNRs). The core of 30 Dor is unique, with a complex velocity structure that parallels its chaotic optical morphology. We use our calibrated echelle data to measure the physical properties and energetic requirements of these velocity structures. The most spectacular structures in 30 Dor are several fast expanding shells, which appear to be produced at least partially by SNRs.
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References
Arsenault, R., & Roy, J.-R. 1988,A&A,201, 199
Chu, Y.-H. and Kennicutt, R.C. 1986,ApJ,311, 85
Chu, Y.-H. and Kennicutt, R.C. 1988a,AJ,95, 1111
Chu, Y.-H. and Kennicutt, R.C. 1988b,AJ,96, 1874
Chu, Y.-H. and Kennicutt, R.C. 1993a, submitted toApJ
Chu, Y.-H. and Kennicutt, R.C. 1993b, in preparation
Chu, Y.-H., Kennicutt, R.C., Schommer, R.A., and Laff, J. 1992,AJ,103, 1545
Chu, Y.-H. and Mac Low, M.-M. 1990,ApJ,365, 510
Chu, Y.-H., Mac Low, M.-M., Garcia-Segura, Wakker, and Kennicutt 1993,ApJ, in press
Conti, P.S., Garmany, C.D., and Massey, P. 1986,AJ,92, 48
Gallagher, J.S., and Hunter, D.A. 1983,ApJ,274, 141
Hippelein, H. H. 1986,A&A,160, 374
Hippelein, H. and Fried, J.W. 1984,A&A,141, 49
Lucke, P.B. 1971,ApJS,255, 73
Lucke, P.B. and Hodge, P.W. 1970,AJ,75, 171
Mac Low, M.-M. and MCray, R. 1988,ApJ,324, 776
McCray, R. and Kafatos, M.C. 1987,ApJ,317, 190
Massey, P., Garmany, G.D., Silkey, M., and Degioia-Eastwood, K. 1989,AJ,97, 107
Meaburn, J. 1980,MNRAS,192, 365
Meaburn, J. 1981,MNRAS,196, 19p
Meaburn, J. 1984,MNRAS,211, 521
Meaburn, J. 1988,MNRAS,235, 375
Melnick, J. 1977,ApJ,213, 15
Melnick, J. 1980,A&A,86, 304
Rosa, M., & Solf, J. 1984,A&A,130, 29
Roy, J.-R., Arsenault, R., and Joncas, G. 1986,ApJ,300, 624
Skillman, E.D., & Balick, B. 1984,ApJ,280, 580
Smith, M.G. and Weedman, D.W. 1970,ApJ,161, 33
Smith, M.G. and Weedman, D.W. 1971,ApJ,169, 271
Smith, M.G. and Weedman, D.W. 1972,ApJ,172, 307
Smith, M.G. and Weedman, D.W. 1973,ApJ,179, 461
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Chu, Y.H., Kennicutt, R.C. Internal motions of HII regions and giant HII regions. Astrophys Space Sci 216, 253–262 (1994). https://doi.org/10.1007/BF00982502
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DOI: https://doi.org/10.1007/BF00982502