Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-12T20:01:48.211Z Has data issue: false hasContentIssue false
  • English
  • Français

Molecular structures of other galaxies compared to that of the galaxy

Published online by Cambridge University Press:  14 August 2015

L. J. Rickard
L. J. Rickard*
Affiliation:
National Radio Astronomy Observatory,∗ Green Bank, W. Va.,U.S.A.

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.

Of the eleven galaxies with detected CO emission, eight have bright nuclear CO sources: M82, NGC 253, M51, NGC 5236, NGC 1068, Maffei 2 (Rickard et al. 1977a,b), NGC 6946, and IC 342 (Morris and Lo 1978). Two have disk-population CO sources and no detectable nuclear source (M31 and M81, Combes et al. 1977a), and one has no obvious nucleus (LMC, Huggins, et al. 1975). Nuclear maxima thus appear to be the rule for galaxies with extensive molecular components, and such a peak is also seen in our Galaxy (e.g., Bania 1977). In Figure 1, I compare the CO data for the nuclei of M82 and M31 with spectra of the Galactic nucleus as it would be seen at their respective distances. (The Galactic spectra were synthesized from the date of Bania [1977], and assume a uniform z-distribution of 30 pc width.) The Galaxy is roughly intermediate, being about one-fifth the intensity of M82 and more than six times the intensity of M31.

Type
VII. COMPARISONS OF OUR GALAXY WITH OTHER GALAXIES
Information
Symposium - International Astronomical Union , Volume 84: The Large-Scale Characteristics of the Galaxy , 1979 , pp. 413 - 416
Copyright
Copyright © Reidel 1979 

References

Bania, T. M.: 1977, Astrophys. J. 216, pp. 381–404.CrossRefGoogle Scholar
Churchwell, E., Witzel, A., Huchtmeier, W., Pauliny-Toth, I., Roland, J. and Sieber, W.: 1977, Astron. Astrophys. 54, pp. 969–971.Google Scholar
Combes, F., Encrenaz, P. J., Lucas, R., and Weliachew, L.: 1977a, Astron. Astrophys. 55 pp. 311–314.Google Scholar
Combes, F., Encrenaz, P. J., Lucas, R., and Weliachew, L.: 1978, Astron. Astrophys. 61, pp. L7–L9.Google Scholar
Elias, J. H., Ennis, D. J., Gezari, D. Y., Hauser, M. G., Houck, J. R., Lo, K. Y., Matthews, K., Nadeau, D., Neugebauer, G., Werner, M. W., and Westbrook, W. E.: 1978, Astrophys. J. 220, pp. 25–41.CrossRefGoogle Scholar
Emerson, D. T.: 1978, Astron. Astrophys. 63, pp. L29–L30.Google Scholar
Gardner, F. F., and Whiteoak, J. B.: 1974, Nature 247, pp. 526–527.CrossRefGoogle Scholar
Gardner, F. F., and Whiteoak, J. B.: 1975, M.N.R.A.S., 173, pp. 77P–81P.CrossRefGoogle Scholar
Gardner, F. F., and Whiteoak, J. B.: 1976, Proc. Astron. Soc. Aust. 3, pp. 63–65.CrossRefGoogle Scholar
Gordon, M. A.: 1978, Astrophys. J. 222, pp. 100–102.CrossRefGoogle Scholar
Gordon, M. A., and Burton, W. B.: 1976, Astrophys. J. 208, pp. 346–353.CrossRefGoogle Scholar
Hildebrand, R. H., Whitcomb, S. E., Winston, R., Steining, R. F., Harper, D. A., and Moseley, S. H.: 1977, Astrophys. J. 216, pp. 698–7C CrossRefGoogle Scholar
Huchtmeier, W., Witzel, A., Kuhr, H., Pauliny-Toth, I., and Roland, J.: 1978, Astron. Astrophys. 64, pp. L21–L24.Google Scholar
Huggins, P. J., Gillespie, A. R., Phillips, T. G., Gardner, F. F., and Knowles, S.: 1975, M.N.R.A.S. 173, pp. 69P–71P.CrossRefGoogle Scholar
Lépine, J.R.D., and Dos Santos, P. M.: 1977, Nature 270, p. 501.CrossRefGoogle Scholar
Morris, M., and Lo, K. Y.: 1978, Astrophys. J., in press.Google Scholar
Nguyen-Q-Rieu, , Mebold, U., Winnberg, A., Guibert, J., and Booth, R.: 1976, Astron. Astrophys. 52, pp. 467–469.Google Scholar
Rickard, L. J., Palmer, P., and Turner, B. E.: 1978, in preparation.Google Scholar
Rickard, L. J., Palmer, P., Morris, M., Turner, B. E., and Zuckerman, B.: 1978a, Astrophys. J. 213, pp. 673–695.CrossRefGoogle Scholar
Rickard, L. J., Palmer, P., Turner, B. E., Morris, M., and Zuckerman, B.: 1977c, Astrophys. J. 214, pp. 390–393.CrossRefGoogle Scholar
Rickard, L. J., Turner, B. E., and Palmer, P.: 1977b, Astrophys. J. (Letters) 218, pp. L51–L55.CrossRefGoogle Scholar
Roberts, W. W., and Burton, W. B.: 1977, in “Topics in Interstellar Matter”, van Woerden, H. (ed.), Reidel, Dordrecht, pp. 195–205.CrossRefGoogle Scholar
Weliachew, L.: 1971, Astrophys. J. (Letters) 167, pp. L47–L52.CrossRefGoogle Scholar
Whiteoak, J. B., and Gardner, F. F.: 1973, Astrophys. Lett. 15, pp. 211–215.Google Scholar
Whiteoak, J. B., and Gardner, F. F.: 1975, Astrophys. J. (Letters) 195, pp. L81–L84.CrossRefGoogle Scholar
Whiteoak, J. B., and Gardner, F. F.: 1976a, M.N.R.A.S. 174, pp. 627–636.CrossRefGoogle Scholar
Whiteoak, J. B., and Gardner, F. F.: 1976b, M.N.R.A.S. 174, pp. 51P–52P.CrossRefGoogle Scholar