Radio emission from Sgr A and its extended halo

Details Radio emission from Sgr A and its extended halo Radio emission from Sgr A and its extended halo

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aipc..155..127m&link_type=abstract

AIP Conference Proceedings, Volume 155, pp. 127-132 (1987).

Computer Science

10

Scientific paper

Observations of the Sgr A complex with the VLA reveal that the diffuse structure surrounding Sgr A East and West consists of two extended components. One is a 20-pc-diameter halo which appears to be associated with the nonthermal Sgr A-E shell source, and which is elongated along the galactic plane. The second component is a set of narrow radio protrusions from the Sgr A-W complex which run perpendicular to the galactic plane. A few of these protrusions appear to merge smoothly with the arms of the inner ``3-armed spiral'' structure of Sgr A-W. These protrusions are discussed in the context of a model of a directed wind; magnetic fields may play some role in directing and collimating them.
Comparison of low and high-frequency maps reveals that the bulk of Sgr A-W is located in front of Sgr A-E. This supports the notion that Sgr A-E is unrelated to the activity in the galactic nucleus.
New, high-resolution images of the Sgr A-W complex show several new features of the inner few parsecs of the galaxy. Three of these are briefly discussed.

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