Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-12T11:46:20.799Z Has data issue: false hasContentIssue false
  • English
  • Français

Molecular Clouds in Dwarf Irregular Galaxies

Published online by Cambridge University Press:  14 August 2015

C. Henkel
C. Henkel*
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 5300 Bonn 1, F.R.G.

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 study of molecular clouds in dwarf galaxies was, until recently, an arduous task and provided detections in only a handful of sources (see Thronson and Bally 1986; Wiklind et al. 1986; Tacconi and Young 1987; Arnoult et al. 1988). Line strengths observed in CO were small (<100mK) and measurements were confined to one position per source, thus inhibiting any detailed work. However, dwarf galaxies appear to be much more abundant than either spirals or large ellipticals and play an important role in our understanding of star and galaxy formation (see e.g. Gerola et al. 1980; Gallagher and Hunter 1984; Silk et al. 1987). With small rotational velocities (typically 50-lOOkms-1), the absence of density waves, and low metallicities, they provide, by "local" standards, an interstellar environment with even more extreme conditions than the outer Galaxy. Detailed molecular studies are hence important.

Type
Joint Commission Meeting
Information
Highlights of Astronomy , Volume 8: Highlights of Astronomy. As presented at the XXth General Assembly of the IAU, 1988 , 1989 , pp. 597 - 598
Copyright
Copyright © Kluwer 1989

References

Becker, R., Appenzeller, I., Wiklind, T., Wouterloot, J.G.A., Henkel, C., Wilson, T.L., Diamond, P.: 1988, Astron. Ges. Abstract Ser. 1, 42 Google Scholar
Becker, R., Schilke, P., Henkel, C.: 1989, Astron. Astrophys., in pressGoogle Scholar
Cohen, R.S. et al.: 1988, Astrophys. J. 331, L95 Google Scholar
Dekel, A., Silk, J.: 1986, Astrophys. J. 303, 39 Google Scholar
Elmegreen, B.G., Elmegreen, D.M.: 1987, Astrophys. J. 320, 182 CrossRefGoogle Scholar
Gallagher, J.S., Hunter, D.A.: 1984, Ann. Rev. Astron. Astrophys. 22, 37 Google Scholar
Gerola, H., Seiden, P.E., Schulman, L.S.: 1980, Astrophys. J. 242, 517 Google Scholar
Henkel, C., Wouterloot, J.G.A., Bally, J.: 1986, Astron. Astrophys. 155, 193 Google Scholar
Ohta, K., Sasaki, M., Saito, M.: 1988, Pub. Astron. Soc. Japan, in pressGoogle Scholar
Silk, J., Wyse, R.F.G., Shields, G.A.: 1987, Astrophys. J. 322, L59 Google Scholar
Tacconi, L.J., Young, J.S.: 1987, Astrophys. J. 322, 681 Google Scholar
Thronson, H.A., Bally, J.: 1986, in “Star Formation in Galaxies”, NASA Conf.Pub. 2466, ed. Persson, C.J., p. 267 Google Scholar
Wiklind, T., Henkel, C.: 1989, Astron. Astrophys., submittedGoogle Scholar
Wiklind, T., Rydbeck, G.: 1986, Astron. Astrophys. 164, L22 Google Scholar