Hostname: page-component-857557d7f7-nfgnx Total loading time: 0.001 Render date: 2025-11-22T13:25:19.135Z Has data issue: false hasContentIssue false
  • English
  • Français

VLA Observations of Sgr A

Published online by Cambridge University Press:  04 August 2017

W. M. Goss ,
U. J. Schwarz ,
R. D. Ekers  and
J. H. van Gorkom
W. M. Goss
Affiliation:
Kapteyn Astronomical Institute, Groningen, the Netherlands
U. J. Schwarz
Affiliation:
Kapteyn Astronomical Institute, Groningen, the Netherlands
R. D. Ekers
Affiliation:
NRAO∗, Very Large Array Socorro, New Mexico, U.S.A.
J. H. van Gorkom
Affiliation:
Kapteyn Astronomical Institute, Groningen, the Netherlands

Abstract

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 radio source Sgr A has been mapped with the Very Large Array (VLA) at 6 and 20 cm with an angular resolution of 5″ x 8″ arc. In agreement with the earlier “WORST” map, the non-thermal source Sgr A East shows a shell structure, while the thermal source Sgr A West shows a spiral-like morphology. We suggest that Sgr A East is a supernova remnant (SNR) near the galactic centre. Its surface brightness is the third largest in our galaxy after Cas A and the Crab Nebula. The diameter is 9 pc and the source fits the surface-brightness diameter relationship of Clark and Caswell (1976) if a distance of 10 kpc is assumed.

Information

Type
I. Young Supernova Remnants
Information
Symposium - International Astronomical Union , Volume 101: Supernova Remnants and Their X-Ray Emission , 1983 , pp. 65 - 69
Copyright
Copyright © Reidel 1983 

References

Balick, B., Brown, R.L. 1974, Astrophys. J. 194, 265 CrossRefGoogle Scholar
Bregman, J.D., Schwarz, U.J. 1982, Astron.: Astrophys. 112, L6 Google Scholar
Caswell, J.L., Lerche, I. 1979, Mon. Nat. R. Astrl. Soc. 187, 201 CrossRefGoogle Scholar
Clark, D.H., Caswell, J.L. 1976, Mon. Nat. R. Astr. Soc. 174, 267 CrossRefGoogle Scholar
Downes, D., Martin, A.H.M. 1971, Nature 233, 112 CrossRefGoogle Scholar
Dulk, G.A., Slee, O.B. 1974, Nature 248, 33 CrossRefGoogle Scholar
Ekers, R.D., Lynden-Bell, D. 1971, Astrophys. Letters 9, 189 Google Scholar
Ekers, R.D., Goss, W.M., Schwarz, U.J., Downes, D., Rogstad, D.H. 1975, Astron. Astrophys. 43, 159 Google Scholar
Ekers, R.D., van Gorkom, J.H., Schwarz, U.J., Goss, W.M. 1983, Astron. Astrophys., in press Google Scholar
Gopal - Krishna, , Swarup, G. 1976, Astrophys. Letters 17, 45 Google Scholar
Güsten, R., Downes, D. 1980, Astron. Astrophys. 87, 6 Google Scholar
Jones, T.W. 1974, Astron. Astrophys. 30, 37 Google Scholar
Milne, D.K. 1979, Ast. J. Phys. 32, 83 Google Scholar