New structures near the compact radio source at the Galactic Centre

Details New structures near the compact radio source at the Galactic Centre New structures near the compact radio source at the Galactic Centre

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.348...45y&link_type=abstract

Nature (ISSN 0028-0836), vol. 348, Nov. 1, 1990, p. 45-47. Research supported by Northwestern University and NSF.

Astronomy and Astrophysics

Astronomy

44

Black Holes (Astronomy), Galactic Nuclei, Radio Sources (Astronomy), Stellar Mass, High Resolution, Maximum Entropy Method, Spatial Resolution

Scientific paper

High-resolution radio images made at 2-cm wavelength of the central arcsec of the Galaxy are presented. Sgr A(asterisk) is surrounded by at least four satellite radio features. Interpreted as thermally emitting blobs of plasma, they typically have sizes less than 1700 AU and are within a projected distance of 3500 from Sgr A(asterisk). Another set of larger radio features, 2-4 arcsec from Sgr A(asterisk), shows a regular progression of galactocentric distance with position angle. From the placement and appearance of all these structures, it is suggested that they are physically associated with Sgr A(asterisk). If this is so, they can be used as probes of the immediate vicinity of the possible massive black hole at the Galactic Center.

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