Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.357..308w&link_type=abstract
Nature (ISSN 0028-0836), vol. 357, no. 6376, May 28, 1992, p. 308-310. Research supported by NASA.
Astronomy and Astrophysics
Astronomy
26
Galactic Nuclei, Galactic Structure, High Temperature Gases, Radio Sources (Astronomy), Brightness Temperature, Ionized Gases, Milky Way Galaxy, Proportional Counters, Stellar Winds
Scientific paper
Radio continuum observations have shown a chain of blobs of emission leading from SgrA* to a small cavity which is located in one of the ionized gas streamers (the Bar) that orbit SgrA* and which is associated with hot gas. Further high-resolution radio images are presented here which show that the blobs are connected to SgrA* by a ridge of emission. It is suggested that the blobs are formed by the interaction of stellar winds from the IRS16 cluster with the gravitational potential of SgrA*. The hot gas then results from the dissipation of the kinetic energy of the blobs as they collide with the orbiting ionized streamer. These collisions are of dynamical significance for the motion of the Bar around the Galactic Center, and there should be detectable variability in the structure on a timescale of 10 yrs.
Wardle Mark
Yusef-Zadeh Farhad
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