Hostname: page-component-745bb68f8f-v2bm5 Total loading time: 0 Render date: 2025-02-03T09:01:43.742Z Has data issue: false hasContentIssue false
  • English
  • Français

7.11. Inside the central cavity

Published online by Cambridge University Press:  25 May 2016

Peter G. Mezger  and
Sabine Philipp
Peter G. Mezger
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Sabine Philipp
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany Institut für Theoretische Astrophysik Tiergartenstrasse 15, 69121 Heidelberg, 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 Circum-Nuclear Disk (CND) is probably a by-product of the explosive event which created Sgr A East. Its inner edge of radius R ~ 1.7pc is well developed and comprises the Central Cavity (CC) which is filled with ~ 260 M⊙ of ionized gas. ISM appears to flow through the CND into the Central Cavity at a rate of M ~ 0.01 M⊙yr−1. Dust and Lyman continuum luminosities of the central 1.25 parsec, corrected for photons not absorbed by dust and gas inside the CC are ~ 108L⊙ and ~ 1051 Lyc photons s−1, most of which are provided by a cluster of 24 hot and massive stars, which also provide ~ 1/3 of the integrated K-band flux density (see the recent review by Mezger et al., 1996). A larger number of cool M- and K-giants and more than a million low-mass MS stars provide the remaining flux density, which comes from a diffuse background emission first seen in our NIR mosaic maps (Zylka et al., 1997).

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 313 - 314
Copyright
Copyright © Kluwer 1998 

References

Duschl, W.J., 1997, in these proceedings.Google Scholar
Mezger, P.G., Duschl, W.J., Zylka, R., 1996, A&AR, 7, 4.Google Scholar
Philipp, S., Zylka, R., Mezger, P.G. et al., 1997, in prep.Google Scholar
Zylka, R. et al., 1997, in these proceedings.Google Scholar