Hostname: page-component-848d4c4894-wzw2p Total loading time: 0 Render date: 2024-05-16T01:03:02.076Z Has data issue: false hasContentIssue false
  • English
  • Français

HII regions and star formation in the galactic center

Published online by Cambridge University Press:  14 August 2015

P. G. Mezger  and
T. Pauls
P. G. Mezger
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, Federal Republic of Germany
T. Pauls
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, Federal Republic of Germany

Extract

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.

The centimeter wavelength continuum radiation seen toward the Galactic center (Figure 1) is a mixture of thermal (free-free) and nonthermal (synchrotron) radiation which originates in the nucleus and along the line-of-sight. In this review we discuss only the thermal emission (also see Mezger 1974 and Oort 1977). High-frequency radio continuum and recombination line observations show that the thermal radiation comes from extend, low-density (ELD) HII, and a number of giant “radio HII regions” (see Mezger 1978 for definitions). The approximate half-power contour of the ELD HII (labelled EI in Fig. 1), probably represents a superposition of evolved and expanded HII regions. Thermal radiation outside EI comes predominantly from along the line-of-sight (see Pauls and Mezger 1975).

Type
VI. THE GALACTIC NUCLEUS
Information
Symposium - International Astronomical Union , Volume 84: The Large-Scale Characteristics of the Galaxy , 1979 , pp. 357 - 366
Copyright
Copyright © Reidel 1979 

References

Altenhoff, W. J., Downes, D., Pauls, T., and Schraml, J.: 1978, Astron. Astrophys. Suppl., in press.Google Scholar
Alvarez, J. A., Furniss, I., Jennings, R. E., and King, K. J.: 1974, in HII Regions and the Galactic Centre, Proc. Eighth ESLAB Symp., ed. Moorwood, A.F.M. (Neuilley-sur-Seine: ESRO), p. 69.Google Scholar
Bania, T. M.: 1977, Astrophys. J. 216, 381.Google Scholar
Becklin, E. E., Matthews, K., Neugebauer, G., and Willner, S. P.: 1978a, ibid 219, 121.Google Scholar
Becklin, E. E., Matthews, K., Neugebauer, G., and Willner, S. P.: 1978b, ibid 220, 831 Google Scholar
Casse, J. L., and Shaver, P. A.: 1977, Astron. Astrophys. 61, 805.Google Scholar
Churchwell, E., Smith, L. F., Mathis, J., and Mezger, P. G.: 1978, ibid in press.Google Scholar
Downes, D.: 1974, in HII Regions and the Galactic Centre, Proc. Eighth ESLAB Symp., ed. Moorwood, A.F.M. (Neuilley-sur-Seine: ESRO), p. 247.Google Scholar
Ekers, R. D., Goss, W. M., Schwarz, U. J., Downes, D., and Rogstad, D. H.: 1975, Astron. Astrophys. 43, 159.Google Scholar
Fukui, Y., Iguchi, T., Kaifu, N., Chikada, Y., Morimoto, M., Nagane, K., Miyazawa, K., and Miyaji, T.: 1977, Pub. Ast. Soc. Japan 29, 643.Google Scholar
Gardner, F. F., and Whiteoak, J. B.: 1977, Proc. Ast. Soc. Australia 3, 150.Google Scholar
Gatley, I., Becklin, E. E., Werner, M. W., and Wynn-Williams, C. G.: 1977, Astrophys. J. 216, 277.CrossRefGoogle Scholar
Gatley, I., Becklin, E. E., Werner, M. W., and Harper, D. A.: 1978, ibid 220, 822.Google Scholar
Harvey, P. M., Campbell, M. F., and Hoffmann, W. F.: 1976, ibid 205, L69.Google Scholar
Jennings, R. E.: 1975, in Proceedings of the Symposium on HII Regions and Related Topics, eds. Wilson, T. L. and Downes, D. (Springer: Berlin), p. 137.Google Scholar
Kesteven, M. J., and Pedlar, A.: 1977, Mon. Not. Roy. Ast. Soc. 180, 731.Google Scholar
Low, F. J., Kurtz, R. F., Poteet, W. M., and Nishimura, T.: 1977, Astrophys. J. 214, L115.Google Scholar
Mezger, P. G.: 1974, in Proceedings of ESO/SRC/CERN Conference on Research Programs for the Large Space Telescopes, ed. Reig, A. (Geneva: ESO), p. 79.Google Scholar
Mezger, P. G.: 1978, Astron. Astrophys., in press.Google Scholar
Mezger, P. G., Churchwell, E. B., and Pauls, T. A.: 1974, in Stars and the Milky Way System, ed. Marvridis, L. N. (Berlin - Heidelberg - New York: Springer), p. 140.Google Scholar
Neugebauer, G., Becklin, E. E., Matthews, K., and Wynn-Williams, C. G.: 1978, Astrophys. J. 220, 149.Google Scholar
Oort, J. H.: 1977, Ann. Rev. Astr. Ap. 15, 295.Google Scholar
Pauls, T., Mezger, P. G., and Churchwell, E.: 1974, Astron. Astrophys. 34, 327.Google Scholar
Pauls, T., and Mezger, P. G.: 1975, ibid 44, 259.Google Scholar
Pauls, T., Mezger, P. G.: 1978, in preparation.Google Scholar
Pauls, T., Downes, D., Mezger, P. G., and Churchwell, E.: 1976, Astron. Astrophys. 46, 407.Google Scholar
Pedlar, A., Davies, R. D., Hart, L., and Sh-ver, P. A.: 1978, Mon. Not. Roy. Ast. Soc. 182, 473.CrossRefGoogle Scholar
Rieke, G. H., Telesco, C. M., and Harper, D. A.: 1978, Astrophys. J. 220, 556.Google Scholar
Sanders, R. H., Wrixon, G. T., and Mebold, U.: 1977, Astron. Astrophys. 61, 329.Google Scholar
Schmidt, J.: 1978a, dissertation, University of Bonn.Google Scholar
Schmidt, J.: 1978b, in preparation.Google Scholar
Scoville, N. Z.: 1972, Astrophys. J. 175, L127.Google Scholar
Smith, L. F., Biermann, P., and Mezger, P. G.: 1978, Astron. Astrophys. in press.Google Scholar
Thum, C., Mezger, P. G., Pankonin, V., and Schraml, J.: 1978, ibid 64, L17.Google Scholar
Willner, S. P.: 1978, Astrophys. J. 219, 870.Google Scholar
Willner, S. P.: 1977, ibid 218, L103.Google Scholar